687 results about "Shared secret" patented technology

The invention discloses an industrial internet data security communication method based on hybrid anti-quantum cryptography, which relates to the technical field of data communication, and comprises the following steps: acquiring a key pair and an anti-quantum security certificate; sending a connection request to data receiver equipment to complete certificate credibility authentication, and sending an anti-quantum security certificate of the equipment; receiving a shared key seed sent by the data receiver equipment; decrypting the encapsulated ciphertext to obtain a shared key seed, and generating a corresponding shared key according to the same shared key generation algorithm as the data receiver equipment; the method comprises the following steps of: signing original data by using a signature private key, splicing a signature and the original data to obtain spliced data, encrypting the spliced data by using a shared key based on an AES-256-GCM algorithm to obtain an encrypted ciphertext and an ML-DSA signature, and sending the encrypted ciphertext to data receiver equipment. According to the method, the key distribution step is simplified, the signature verification calculation overhead is optimized, and the data communication efficiency is improved.

The invention discloses an anti-quantum security identity authentication method and system, a medium and equipment. The method comprises the following steps: S1, a client, a service server and a key distribution center perform key configuration by adopting a digital signature algorithm; s2, the client sends an authentication request to the authentication server, and receives an authentication response with a bill granted bill returned by the authentication server; s3, the client sends a bill request to the bill issuing server, and receives a bill response with the service bill returned by the bill issuing server; s4, the client generates a client key exchange public key by adopting a first key exchange algorithm and sends an access request, the service server calculates a shared key and a ciphertext after receiving the public key, generates an access response comprising the ciphertext and identity information encrypted by using the shared key, and returns the access response to the client; and S5, the client receives the access response and obtains the shared key, and performs encrypted communication with the service server by using the shared key. The method has forward safe quantum attack resistance and strong identity authentication.

The invention discloses an interface authentication method, system and device based on a national cryptographic algorithm and a medium, belongs to the technical field of computer security, and aims to solve the technical problem of how to realize identity authentication, data encryption, integrity verification and replay attack protection of interface interaction and meet the security requirement of a key information system. According to the technical scheme, the method comprises the following steps: system initialization: a server and a client respectively generate SM2 key pairs, the client and the server exchange public keys through a secure channel, and a mapping relation between the public key of the opposite side and an identity label is stored; session key negotiation: exchanging a temporary public key based on an SM2-ECDH algorithm, calculating a shared secret value, and deriving an SM4 session key through a KDF; the client side carries out SM3 hash and SM2 signature on request parameters, and the server side verifies the signature and verifies a timestamp and a random number to resist replay attacks; and session key updating: triggering key updating according to a preset condition, and encrypting the new key negotiation message by using the original session key.

The invention discloses an anti-quantum security data transmission authentication method based on an SLH-DSA, and aims to cope with communication security challenges in a quantum computing environment. The device generates a key pair locally in a registration phase and applies for an anti-quantum identity certificate from a certificate agent. In the authentication stage, a user exchanges an identity certificate and a key parameter to realize identity authentication and negotiate a shared key. In the data transmission stage, a session key is dynamically derived by using a shared key, data is encrypted in combination with a national secret symmetric encryption algorithm SM4, and integrity verification is performed by using an anti-quantum signature algorithm. The method gives consideration to security, lightweight and performance, has quantum attack resistance and forward security, is suitable for application scenarios with high data security requirements, such as industrial Internet of Things and smart power grids, and has good application prospects and popularization values.

The invention discloses a high-load data steganography method, system and device and a medium, and the method comprises the steps: obtaining secret data of a power system, and converting the secret data into a novenary sequence; a quantum key distribution system is utilized to generate a shared key, the novenary sequence is encrypted through an encryption key, encrypted information is obtained, and the shared key comprises the encryption key and a mapping key; determining a corresponding first unit matrix from a preset mapping library based on the mapping key, and performing non-overlapping tiling on the first unit matrix in a two-dimensional plane to obtain a second-order reference matrix; and scanning a preset carrier image into a non-overlapping first pixel pair sequence according to a Hilbert curve, and embedding the encrypted information into the first pixel pair sequence by using the second-order reference matrix to obtain a steganographic image, so that the data transmission security can be improved.

An apparatus and system for privacy protection for Ambient Internet-of-Things (A-IoT) devices are disclosed. A-IoT devices transmit obfuscated identifiers (OIDs) instead of actual identifiers, which are de-obfuscated by the network to retrieve the original identifiers. The device identifiers are obfuscated using shared secret parameters and periodically updated configurations. Hash-based lightweight privacy mechanisms, temporary identifiers (TempIDs), and pseudonym generation may be used to ensure secure communication and prevent replay attacks.

The invention discloses a data security transmission method and system with anti-quantum security, and relates to the technical field of data transmission, and the method comprises the steps: obtaining information which comprises an identity identifier, a temporary public key, a temporary secret value and a validity period demand of a user; generating a public key and a private key of the user based on an ML-DSA signature algorithm; sending an authentication request to a CA authentication center according to the information and a public key of the user, and receiving a certificate authenticated, signed and issued by the CA authentication center; exchanging and verifying the credentials of each other with other users; and after the certificate verification is passed, responding to the data transmission instruction, calling and executing a temporary shared key generation module, outputting a temporary shared key, and then sending data to other users or receiving data from other users based on an SM4 algorithm and an ML-DSA signature algorithm according to the temporary shared key. According to the invention, the cost and risk during upgrading and updating of the system are reduced.

The invention provides a secure communication method and system based on a QRNG and a Beidou positioning terminal. A sending end and a receiving end of communication preset a pre-shared initial key, and a space-time reference parameter group is obtained through Beidou positioning; a secret key packaging secret key is generated by using a national secret SM4 algorithm; monitoring time-space parameter deviation in a communication process in real time, and triggering a key updating protocol when the time-space parameter deviation exceeds a threshold value; and after the receiving end verifies the Hash verification value, decrypting to obtain the primary encryption key, and restoring the plaintext data. According to the system, the generated true random number sequence is used as an encryption key, so that the unpredictability and randomness of the key are fundamentally enhanced, and quantum computing attack and man-in-the-middle attack are effectively resisted. The use of the pre-shared key mechanism and the key packaging key improves the response speed and efficiency of the communication system. And meanwhile, the position parameter and the timestamp are deeply fused to the key generation process, so that the spatio-temporal information is more difficult to counterfeit, and the defense capability of the system is further improved.

Presented herein are systems and methods of generating security-aware tokens. A token may include (i) a first signature encrypted by the second service and (ii) an identification of the plurality of databases accessible using the first token. When a processor determines that the token is valid, the processor may generate a second signature using an encryption key of the first service and a third signature using the shared key of the second service. Thereby a second token derivative of the first token can be created to include (i) the second signature of the first service, (ii) the third signature generated from the shared key of the second service, and (iii) the identification of the plurality of databases accessible using the second token.

The invention discloses a national secret algorithm data encryption transmission method and system. The method comprises the steps of obtaining to-be-encrypted data and network parameters, establishing a Bayesian network probability ablation model, performing Monte Carlo sampling ablation national secret encryption and evaluating attack risks, and generating a probability security encryption strategy; and extracting a Brinell feature set, constructing a long and short-term memory network time prediction model, and optimizing by using a simulated annealing algorithm to obtain an optimal encryption parameter configuration sequence. Generating a key pair according to the sequence and SM2, establishing a shared key by means of an elliptic curve Diffie-Hellman protocol, deriving an SM4 session key through SM3, and establishing a hybrid encryption key system; constructing a teacher and student network model, optimizing multi-thread scheduling through adversarial distillation training and a retrieval enhancement technology, and generating a multi-thread parallel encryption architecture; and network parameters are monitored in real time, a reinforcement learning adaptive decision engine is constructed, a strategy is dynamically adjusted, and adaptive encryption transmission is completed. According to the invention, the optimal balance between the security and the efficiency in the data encryption transmission process is realized.

Systems, devices, and methods are provided for cryptographic co-dependent across multiple roots of trust. A device may comprise two or more co-dependent roots of trust, such as a trusted execution environment (TEE) of a main application processor and a cryptographic subsystem comprising a cryptographic processor. A server may validate digital signatures generated by each co-dependent root of trust that is known for the device and then provide the device with cryptographic material that can be used to establish a shared secret. The shared secret may be used by the device to request the performance of a sensitive operation.

The invention discloses an iframe two-way encryption communication method and system based on a network target range, and belongs to the technical field of network security. In the aspect of data communication of iframes of a front-end platform and a third-party platform, security is enhanced, a digital certificate is generated through an ECDH key pair, and a foundation is laid for identity verification; then TCP handshake is simulated to establish a reliable channel, and two-way identity authentication resisting replay attack is achieved through two-way certificate verification and random number exchange; then negotiating a shared key by using ECDH, deriving a dynamic session key through an HKDF algorithm, and ensuring forward confidentiality; and finally, real-time data encryption and integrity verification are carried out by adopting AES-GCM, and the anti-leakage capability is continuously improved through a timing key rotation mechanism. The whole process fuses the characteristics of quantum computing resistance, low resource consumption, efficient transmission and the like, an end-to-end secure communication normal form is provided for Web application, and cross-session key confusion is prevented.

The invention relates to the technical field of power data transmission, and discloses a power data key negotiation and symmetric encryption method, system and device and a medium, and the method comprises the steps: obtaining target power data, and carrying out the first preprocessing of the target power data; performing second preprocessing on the target power data; obtaining a target statistical feature of the gray matrix according to the first preprocessing result, and generating a first replacement structure in combination with a target shared key obtained after the second preprocessing; and encrypting the target power data according to the first replacement structure. According to the invention, the security of the power data is greatly improved. In the power data transmission process, through the method of the invention, it can be ensured that data is not stolen or tampered in the transmission process, and the risk of data leakage is effectively prevented. Meanwhile, the implementation steps of the method are simple and clear, the method is easy to popularize and apply in various power systems, and a powerful guarantee is provided for stable operation of the power systems.

The invention relates to the technical field of electric power communication security, in particular to a power grid data secure transmission system and method based on quantum cryptography and a medium, comprising: a power grid data access module extracts identities of a power grid data request end and a target response end; the quantum key distribution module obtains an original shared key pre-stored by the two communication parties, and generates a quantum key according to the one-time session password and the original shared key; the communication security management module analyzes the shared key information from the quantum key received by the target response end to obtain analyzed shared key information, and performs communication security verification on the original shared key and the analyzed shared key information; and the power grid security communication module encrypts the to-be-transmitted power grid data when the communication security verification result is that the verification is passed, and transmits the power grid encrypted data to the target response end. Through cooperation mechanisms such as quantum key dynamic distribution and security verification, security protection of power grid data transmission is realized, and power grid data communication security is improved.

The invention provides an anti-quantum fuzzy keyword processing method and system and electronic equipment, and relates to the technical field of networks and security. The method comprises the following steps: a client performs wildcard character extension on a keyword set based on a target shared key, generates an encryption index, performs authentication encryption on file identifiers by using the target shared key, forms an encrypted file identifier set, constructs an index table, and uploads the index table and the encrypted file set to a cloud server. The server generates a second wildcard character set according to the query keyword and a fault-tolerant threshold value, generates a trap door set based on the same target shared key and a pseudo-random function and sends the trap door set to the cloud server, and the cloud server traverses the index table, compares the index table with the trap door set and sends the trap door set to the server; and finding out the matched target encryption index and the associated target encryption file identifier and returning the matched target encryption index and the associated target encryption file identifier to the server, and decrypting and acquiring the target file from the cloud server by the server. In this way, high-safety, high-efficiency and extensible privacy protection search service is achieved.

The invention discloses a distributed key generation method and device based on an SM2 algorithm, a medium and equipment. The method comprises the following steps: determining a class group encryption key, a class group decryption key and a corresponding first zero knowledge proof through public parameters generated based on the SM2 distributed key; each participant shares respective secret share based on the class group encryption key, the class group decryption key and the first zero-knowledge proof, and creates a second zero-knowledge proof indicating that sharing is correct; each parameter party collects honest distribution shares and decryption shares based on the second zero knowledge proof, calculates a part of private keys and a part of public keys according to the decrypted secret shares, and creates a third zero knowledge proof indicating correct decryption; according to the third zero knowledge proof, partial public keys of participants correctly executing decryption operation are determined to reconstruct a global public key, the secret is shared by using a polynomial, each participant can contribute a part of shares, and a distributed secret key is generated without any credible setting.

The invention provides an inter-micro-service dynamic secure communication method and device based on chaos cryptography. The method comprises the steps that a service provider instance registers a public key and chaos initial parameters to a service registration center; before calling, the service consumer instance acquires a public key and a chaos initial parameter of a target service provider instance from a service registration center; the service consumer instance performs key negotiation with the acquired public key by using a private key of the service consumer instance to determine a shared key; performing key derivation on the shared key and the chaotic initial parameter to generate an initial key; respectively using the initial keys to initialize the chaotic system so as to generate synchronous encryption key streams; and the two communication parties perform real-time stream encryption and decryption on the communication data between the micro-services by using the encryption key stream. The unpredictability of a chaotic system and modern cryptography can be combined, and a micro-service design mode is deeply integrated, so that a lightweight and high-security communication security mechanism which does not need to share a key in advance and can be adaptive to dynamic change of service is realized.

The invention discloses an authenticable key exchange method and application based on SM2 signature. The method comprises the following steps: a communication participant negotiates to select an elliptic curve and a base point and discloses parameters; each participant generates a private key and a corresponding public key, and the public keys are exchanged through a communication channel; carrying out key negotiation based on elliptic curve point multiplication operation to generate a shared key; each participant signs the related information of the shared key or the public key by using an SM2 signature method to generate a signature result; and the participant verifies the validity of the signature by using the public key of the opposite side through exchanging the signature result and related parameters, thereby realizing identity authentication and key integrity verification. According to the SM2 signature method, a public key and signature parameters are generated through elliptic curve point multiplication operation, and signature and verification are achieved based on the asymmetric relation between a private key and the public key. According to the invention, communication party identity authentication, data integrity verification and key confidentiality protection are realized, and the security and efficiency of key exchange in a cloud computing environment are improved.

The invention discloses a QKD system authentication method and device based on fusion of QRNG and PQC, and belongs to the technical field of information security, and the method comprises the following steps: S1, constructing a key encryption module based on QRNG and PQC, and when a QKD system starts a key negotiation process, carrying out identity verification based on a digital certificate to determine a negotiation object; s2, generating an encrypted random number based on a QRNG in a key encryption module, and obtaining a shared key between negotiation objects based on the encrypted random number and a PQC in a key encryption algorithm; and S3, generating a message authentication code based on the shared key, and performing authentication based on the message authentication code. The technical problem that the complexity is difficult to reduce while the security is improved in the prior art is solved, and the flexibility and expandability of authentication are also improved.

Embodiments described herein provide for a non-transitory machine-readable medium storing instructions to cause one or more processor to perform operations to share a set of keys used to communicate with a wireless accessory device. By sharing the set of keys, functionality of the wireless accessory device can be delegated by an owner to other individuals.

The present disclosure provides systems and methods for providing secure CAN communications. Exemplary embodiments of the present disclosure provide secure CAN communication between vehicle components. According to an embodiment, a method for providing may include: generating, by at least one processing unit of a transmitter, a one-time password (OTP); acquiring, by at least one processing unit of the transmitter, a master key provided in advance to the transmitter and the receiver; deriving, by at least one processing unit of the transmitter, a shared key based on the OTP and the master key; generating, by at least one processing unit of the transmitter, a message authentication code (MAC) based on the derived shared key; attaching, by at least one processing unit of the transmitter, the MAC to the message; and transmitting the attached message to the receiver via the CAN bus by at least one processing unit of the transmitter.

The invention discloses a channel security transmission method for protecting data privacy of an edge gateway of the Internet of Things, and relates to the technical field of security and privacy protection of the Internet of Things, and the method comprises the steps: constructing an edge gateway security architecture, generating a quantum key through a QKD module based on the constructed edge gateway security architecture, and generating sensitivity data through an IPS vNSF; calculating noise based on the sensitivity data, generating disturbance data based on the noise, calculating a shared key, generating an encryption key in combination with the quantum key and the shared key, segmenting the encryption key through Shamir secret sharing, and encrypting and decrypting the key; encrypting the noise by using the decrypted key, generating global noise based on the encrypted noise, and calculating secondary disturbance data based on the global noise; and generating coded data based on the secondary disturbance data, and generating reconstruction data based on the coded data. According to the invention, the comprehensive security authority of the edge gateway in the aspects of key security and privacy protection intensity is improved.

Provided are communication methods and communication devices. One method comprises: on the basis of a shared key, a first device generates a first key; the first device receives a second random number of a second device; on the basis of the first key, the first device generates first authentication information of the first device; and the first device sends a first message to the second device, the first message comprising the first authentication information, and the first authentication information being generated according to one or more of the following information: device information, service-related information, an identifier of a device forwarding the first message, and a first random number and a second random number of the first device.

A method, apparatus, system, and non-transitory computer readable medium for performing user verification and authentication may include receiving a network request from a client device associated with an online service in response to a user access attempt of the online service associated with a user, the network request including message recipient information for a mobile-terminated (MT) short message service (SMS) message and a unique one-time password or pin (OTP) code associated with the user, calculating at least one first signature based on the network request and a shared secret key, the shared secret key shared with the client device, the at least one first signature associated with the user, transmitting a network response to the client device, the network response causing the client device to transmit a call-to-action (CTA) message to at least one user device associated with the user, and determining a status of the user access attempt.

Embodiments are directed to methods and systems for crypto-agile encryption and decryption. A computer system can possess a protocol file that identifies one or more cryptographic software modules. Using these cryptographic software modules, the computer system can generate a plurality of shared secrets and a session key, then use the session key to encrypt a message. The message can be sent to a server computer that can subsequently decrypt the message. At a later time, the protocol file can be updated to identify a different set of cryptographic software modules, which can be used to encrypt messages. Further, the server computer can transmit additional cryptographic software modules to the computer system, enabling the computer system to use those cryptographic software modules to generate cryptographic keys. As such, the cryptographic protocol file can be changed in response to changes in the cryptographic needs of the computer system.

Techniques and methods are described to generate a shared secret key using channel characteristics between a transmitting device and a receiving device. A public key is transmitted to a communication device over a first wireless channel and a second wireless channel that is different from the first wireless channel. From the communication device, a first signal and a second signal both carrying the public key are received over the first wireless channel and the second wireless channel, respectively. Based on the first signal and the public key, a first channel response is calculated and, based on the second signal and the public key, a second channel response is calculated. The secret key is determined based on the first and second channel response. In this way, the generation of a channel-based shared secret key becomes more secure and robust against eavesdropping of illegitimate users, allowing for secure communication.

A system performs a set of cryptographic operations at least by utilizing an API to cause execution of a set of one or more secure element (SE) applications within the SE platform runtime environment of a first computing entity. The set of cryptographic operations include generating a first shared secret, generating a ciphertext at least by encapsulating the first shared secret with a first public key associated with a second computing entity in accordance with an encapsulation algorithm, and transmitting the ciphertext from the first computing entity to the second computing entity. The second computing entity derives the first shared secret by decapsulating the ciphertext with a private key corresponding to the first public key. The first computing entity and the second computing entity then exchange at least one encrypted message, encrypted with an encryption key that includes, or is based at least in part on, the first shared secret.

The invention relates to a secure transmission method and system for encrypted network data. According to the method, a resource state vector is generated by collecting resource state data of Internet of Things equipment, and an environmental risk level is evaluated by using a pre-training decision model in combination with attacked information; performing content feature scanning on the to-be-transmitted data, and performing data sensitivity grading based on key field identification; querying an encryption decision matrix according to the resource state vector, the environmental risk level and the data sensitivity level, and determining a target encryption scheme; a private key and a public key are dynamically generated at an equipment end, a shared key seed is calculated after the public key is exchanged with a communication opposite end, and a target encryption scheme and the shared key seed are used for encrypting data to generate a transmission frame; periodically optimizing the encryption decision matrix through a reinforcement learning algorithm based on encryption time consumption, resource consumption and transmission success rate indexes; the encryption strength is adaptively adjusted, resource utilization is optimized while the security is ensured, and the overall efficiency of the system is improved through continuous feedback optimization.

Some embodiments are directed to a communication system comprising a one or more clients, a server and a middlebox. The middlebox may access to the multiple short-term server private keys of the server. The middlebox may recover a shared key that is negotiated between server and client by decapsulating encapsulation data using a stored client public key and a server private key from the key storage.

The invention discloses an anti-quantum key packaging method and device, a medium and equipment, and the method comprises the steps that a first node generates a first public key and a first private key based on an asymmetric encryption algorithm, and generates a second public key and a second private key based on an anti-quantum encryption algorithm; sending the first public key and the second public key to a second node, so that the second node encrypts a third public key based on the second public key to obtain a public key ciphertext, and generates a shared key based on the first public key and a third private key; receiving a public key ciphertext sent by the second node, and decrypting the public key ciphertext based on the second private key to obtain a third public key; generating the shared key based on a third public key and the first private key; wherein the third public key and the third private key are generated by the second node based on an asymmetric encryption algorithm. According to the invention, by combining an anti-quantum encryption algorithm and a widely used asymmetric encryption algorithm, a secure key exchange mechanism which can resist future quantum computing threats and has high compatibility is provided.