576results about How to "Implement encryption" patented technology

This invention discloses a CPK trustable certification system with a chip including special COS, CPK algorithm, ID certificates, signature protocol, a cryptographic key exchange protocol, a ciphering algorithm and HASH function and divided into intelligent card, USB Key, Flash card and cell phone SIM card. One chip can bear the functions of a cipher machine, signature verification, cryptographic key storage and management.

The invention provides a chip of a consumable container, which comprises a storage module, a control module, an interface module and a data safety module. The storage module is used for storing initial data, printing data, control data and key data; the interface module is used for realizing data communication between the storage module and the control module; the data safety module is respectively connected with the interface module and the control module, and is used for identifying a type and a content of data communicated between a printer and the chip, encrypting matched data in a selected safe mode and decrypting the data; the control module is connected with the storage module and is used for controlling data communication between the chip and the printer and the access operation of the data of the storage module and external data and sending a corresponding control command to the chip according to a safety module processing result so as to realize data communication; and the same keys are stored in the printer and the chip. The invention also provides a data communication method for the chip, the consumable container with the chip structure, and imaging equipment with the consumable container. The safety of the communication data of the chip can be protected.

The present invention discloses a method for encrypting the file in the digital medium playing system and the encrypted file structure thereof, wherein, the method comprises the following procedures: (1) dividing the file to a plurality of segments according to the format character of the file; (2) encrypting the segment content which needs to be encrypted; (3) including paragraph identifier in each segment; and (4) forming all the key values correlative to the file to a key list which is used for transmitting to the subscriber. The encrypted file structure comprises a medium file which is composed of a plurality of segments and a key list that is composed of a plurality of key index values and the corresponding keys. Each segment comprises medium content and the segment length field which is used for indicating the total length of this segment of data. The invention possesses the advantage that the functions of speeding, quickly returning, jumping broadcasting and the like are realized and the security of the encrypted file is increased.

The invention discloses an intelligent manufacturing special network data acquisition scheduling system. On the basis of conception of forwarding and control plane separation, a 4G special line intelligent scheduling system facing intelligent manufacturing is constructed, moreover, the system further satisfies concentrated scheduling and decentralized domain management functions, flexible network resource calling and rapid disposition capability are realized, standard northwards API interfaces are provided for the external, and concentrated management of wireless access equipment, on-demand scheduling and rapid security and other value-added service business opening are realized through SDN and NFV technologies. The system comprises five parts, including an internal network connected with manufacturing equipment in enterprises, a wireless access network based on 4G, a novel wireless access gateway connected with the internal network and an external network, a cloud platform used for carrying out concentrated network scheduling management, and various applications for intelligent manufacturing. The full-network configuration is realized through employing the cloud platform, network interconnection is realized through the novel access gateway, for network element functions, an SDN method is employed to separate a control plane from a data plane in an adaptive mode.

The present invention relates to a DNA dynamic coding based colored image encryption method, comprising: obtaining a key through a colored plain-text image; by the key, calculating an initial value and a parameter of a chaotic system used in scrambling and diffusion processes; substituting the initial value and the parameter to the chaotic system for iteration to obtain W1 and W2, obtaining a scrambling matrix K from W1, obtaining an integer matrix Y and an index matrix Ind from W2, and performing DNA coding on Y according to the index matrix Ind; and performing scrambling on the plain-text image row by row by using the matrix K, then performing coding and diffusion until all rows finish DNA coding, and finally performing decoding and recomposing on a DNA matrix, to obtain a final colored ciphertext image. According to the method, a function SHA256 is used to generate the key, so that the key space is expanded; the generation of the key depends on a plain-text, so that plain-text attack can be effectively resisted; chaotic characteristics are combined with DNA dynamic coding, so that the security is further improved; and meanwhile, scrambling and diffusion operations are performed according to the row of images, so that parallel computing is facilitated and the efficiency is improved.

The invention discloses a image counterfeit deterrence method based on the chaotic feature, comprising: first, by the chaotic mapping system, using the information needed keep secret and counterfeit deterrence to generate the chaotic sequence which is used to encode the information, then, printing the encoded information to the two-dimension bar code image according to the PDF417 bar code; collecting the two-dimension bar code image by the scanner, and operating the preprocessing of image segmentation, filtration, geometric correction and stratified on collected image, then decoding the bar code according to the decoding rule of national standard PDF417 bar code to attain the chaotic encoded information carried by bar code image. The invention fully utilizes the features of chaotic system and two-dimension bar code technique which are combined for image counterfeit deterrence. The invention has the characters as strong secret-keeping property and large information carried, while it can recognize automatically.

The invention belongs to the technical field of information safety, and relates to a database transparent encryption method supporting ciphertext indexes. The method is realized on the basis of a view mechanism and a trigger mechanism of a database system and transparently provides automatic encryption and decryption for users by using the view and the trigger. Under the condition of data inquiry, data is decrypted in the process of filling the view; and when novel data is inserted into a table or the data is corrected, the trigger is utilized for the encryption of the data and the maintenance of the ciphertext indexes. The method for realizing the ciphertext indexes comprises: establishing an auxiliary data structure for realizing the ciphertext indexes and an inquiry and maintenance algorithm on the basis of the database table and SQL language; and utilizing an index extension mechanism of a database system to realize the call and maintenance of the ciphertext indexes. The method is completely transparent as for the database-based application system, does not need to change the prior application system after the deployment of a database security enhancing system, and can guarantee high efficiency of ciphertext retrieval.

The invention discloses a method of a terminal for encrypting videoconference data, which comprises the following steps: generating a network authentication token (AUTN) by a terminal in authentication with a videoconference server; carrying random passwords (RAND) by the videoconference server in media format negotiation requests sent to the terminal after the authentication is succeeded; calculating an encryption key by the terminal by combining the AUTN and the RAND; carrying out negotiation of encryption key and encryption calculation with the videoconference server; and carrying out encryption communication between the two parties after the negotiation is unified. The invention also discloses a system of a terminal for encrypting videoconference data. The method and the system can be used for encrypting videoconference data and ensuring the confidential transmission of the videoconference data. Because user names registered in each terminal are different in a videoconference, encryption keys generated by each terminal are different. In the communication between a terminal and a server, the invention can effectively prevent a third party from eavesdropping.

The invention discloses a large-capacity hiding method for reversible data in a bitstream encryption domain of a JPEG image. According to the method, a user performs exclusive or encryption on extension bits of entropy coding in each of image blocks according to an encryption key in JPEG bitstreams, performs pseudo-random scrambling on remaining AC coefficients except a last non-zero AC coefficient, and then performs the pseudo-random scrambling on the entropy coding of all the image blocks; a cloud performs embedding of extraneous information by a histogram shifting method on the AC coefficients in a bitstream ciphertext according to a hiding key, and can perform non-destructive extraction; and a receiver performs pseudo-random scrambling resumption on the entropy coding of ciphertext image blocks in the bitstream ciphertext according to the encryption key, and then the pseudo-random scrambling resumption and exclusive or decryption of the AC coefficients are performed in the entropycoding of each of the ciphertext image blocks to obtain decrypted bitstreams same as original JPEG bitstreams. The method not only achieves encryption of the extension bits of the entropy coding, butalso encrypts Huffman coding of the entropy coding; and the steganographic capacity is large, and the safety is high.

The invention discloses a method, a device and a system for encryption and decryption of communication, and relates to the field of information processing. A Javascript is utilized to realize encryption and decryption of communication so that safety of user information is guaranteed. The invention comprises an encryption process of communication and a decryption process of communication. The encryption process of communication comprises that: a first character string to be encrypted is extracted from information to be sent; the first character string is converted into first multiple binary numbers to be stored; the stored first multiple binary numbers are encrypted according to a preset encryption algorithm so that second multiple binary numbers are generated; the second multiple binary numbers are converted into a character string to be sent; and transmission encoding is performed on the character string to be sent and an encoding result is sent. The decryption process of communication comprises that: the information which is to be processed and is sent by a sending end is received; transmission decoding is performed on the information to be processed so that a third character string is obtained; the third character string is converted into third multiple binary numbers to be stored; the stored third multiple binary numbers are decrypted according to a preset decryption algorithm so that fourth multiple binary numbers are generated; and the fourth multiple binary numbers are converted into a fourth character string.

It is described a method on a network element with one or more communication ports for transmitting and receiving data packets to and from other network elements in a network for the purpose of synchronization of clocks in a network, said network element comprising a time synchronization module, a time synchronization module clock and a database.

The invention discloses a cloud storage encryption and dereplication method and a cloud storage encryption and dereplication system. The method comprises the following steps of: dividing a data file into a plurality of blocks, firstly transmitting an identification of each data block to a cloud storage system to perform the repetition detection, if the data file is not repeated, encrypting each data block by virtue of a convergence key, respectively encrypting each convergence key, storing a convergence key ciphertext of a first data block by virtue of a client, and storing convergence key ciphertexts of rest data blocks and all data block ciphertexts; and if the data file is repeated, generating a convergence key of the first data block, encrypting the convergence key by utilizing a root node of a hash tree transmitted by the cloud storage system, and storing the generated convergence key ciphertext of the first data block. By adopting the method and the system, the security of the data file can be improved when the convergence encryption and dereplication are adopted, a dictionary can be prevented from being cracked when in attack as far as possible, and the storage space of the client can be saved.

The invention relates to an encryption method applied to a MQTT-SN protocol, and relates to the field of communication. The method employs a harsh algorithm and ciphertext-policy attribute-based encryption method, so that a publishing terminal, an agent server and one or a plurality of subscription terminals can complete encrypted communication. The method herein includes the following steps: an agent server verifying the identity of a publishing/subscription terminal, performing registration of the publishing/subscription terminal, and generating a system common parameter; the publishing terminal encrypting a plaintext load by using the ciphertext-policy attribute-based encryption method; the publishing terminal transmitting the encrypted load to the agent server, the agent server forwarding the encrypted load to one or a plurality of subscription terminals; and the subscription terminal applying for a secrete key from the agent server, decrypting the encrypted load, obtaining a plaintext. According to the invention, the method can implement identity verification of a MQTT-SN protocol publishing/subscription terminal, data integrity verification, and data confidentiality protection, and better addresses the safety issues faced by the MQTT-SN protocol in terminals of wireless sensor network applications.

The invention discloses an authenticated encryption method and a system, relating to the field of communication security. The restorable signature of a message and the symmetric encryption technologyare combined; a commitment value which only can be calculated by a designated message receiving end is used as a session key encryption message; and the message receiving end validates the validity ofthe message by the restorable signature, thus realizing encryption and authentication in one logical step. A key generation unit of a sending end generates a session key of the sending end; an encryption unit encrypts a message to be sent; the receiving end generates a session key of the receiving end; a decryption unit utilizes the session key of the receiving end to decrypts the encrypted message; and the authentication and confirmation message is generated according to the decrypted message, thus validating the validity of the message. When disputes occur, the message receiving end transforms the authenticated and encrypted message signature into a common signature so as to lead a third party to validate the validity of the signature. The invention has the advantages of high security,low calculated amount and transmission cost, and the like.

The invention discloses an encryption method based on characters. The method comprises steps of building a basic transposition table?TB and using a secret key to initialize the basic transposition table to an operation transposition table?TO, converting an input character string into a plaintext sequence number string according to a pre-defined character and sequence number corresponding?table TC, using the operation transposition table?TO for carrying out transposition on the plaintext sequence number string to obtain a ciphertext sequence number string, and converting the ciphertext sequence number string into a ciphertext character string. According to the method, a character?position services as a basic processing unit, dynamic variable data length encryption is realized, length?consistency and?visibility of the ciphertext and the plaintext can be ensured, and platform adaptability and high calculation efficiency are realized.

The invention relates to a method of encrypting data and files for a browser. The method comprises the following steps that an encryption plug-in modifies a code for submitting data and/or uploading a file part in a page code, which returns to a user browser, of a Web website; when a user submits the data and/or uploads a file through the browser, the modified page code for submitting the data and/or uploading the file submits data to be submitted or the file data to be uploaded by the user to a local agent program of the user browser, the agent program calls a password module to encrypt the data to be submitted or the file data to be uploaded, and then the browser submits or uploads the encrypted data or the file data to the Web website, or the agent program submits or uploads the encrypted data or the file data to the Web website. According to the method, the submitted data and/or the uploaded file data can be encrypted without modifying the Web website and calling the plug-in of the browser.

The invention discloses a physical layer secret optical fiber communication system based on chaotic phase encryption, and the system comprises the steps: dividing a broadband random light source generated by a main laser into two identical optical signals, and respectively injecting the two optical signals into slave lasers of two communication sides, thereby generating a synchronous chaotic signal; and then the generated synchronous chaotic signal is used as a phase modulator driving signal, and high-speed optical signals generated by high-order modulation are encrypted and decrypted at a sending end and a receiving end.

The invention discloses a two-dimensional code compiling method. The two-dimensional code compiling method comprises the following steps of: on the basis of a self-adaptive code compiling extended black and white code compiling technology and a code compiling scheme applicable to different multimedia, introducing an interweaving technology into an error-correcting code compiling technology by using a data compression technology with an open structure during compression code compiling; and adopting an advanced morphologic image pre-processing technology based on multi-scale structural analysis. The two-dimensional code compiling method has the advantages that a two-dimensional code is superior to the conventional two-dimensional code standard in terms of information bearing capacity, robustness, safety, reliability and adaptability; and coding and decoding bottom-layer supporting software provides technical support for various types of application of the two-dimensional code to the field of the internet of things in an open interface mode, the market monopoly position of the conventional foreign two-dimensional code standard can be broken, the chaotic situation of the conventional domestic two-dimensional code application is changed, and a firm foundation is laid for the development of the internet-of-things industry.

The invention discloses an identity-based wireless sensor network security trust method. In the method, firstly each node in the network is loaded with a trust management structure; wherein the trust management structure is composed of a secret key management module, a receiving credit module, a storage credit module, a credit calculating module, an application selecting module, a route management module, a decision making module, a credit management module and a monitoring module. On the basis of the trust management structure, a trust communication network is established by broadcasting query node information among nodes, receiving query respond and updating node credit and by identity-based public key password encryption and authentication among nodes, so as to realize safe communication of credit information among nodes. The invention reduces complexity of credit calculation in the wireless sensor network, improves security of communication of the wireless sensor network trust system, solves communication problem of a source node and a destination node under multi-hop condition, and can meet the requirement of large-scale self-organized network application.

The invention discloses a secure storage device which comprises an interface module, a server module, an encryption algorithm module, an encryption strategy management module, a recognition module and a storage medium module. The server module is used for providing an operating system and file processing programs of the storage device, receiving file access requests from a local computer of a user, converting operation results into images, and transmitting the images to the local computer of the user through the interface module. The encryption algorithm module is used for extracting an encryption strategy from the encryption strategy management module, adopting the encryption strategy to carry out encryption on files according to random seeds formed by the recognition module and file characteristic information and then storing the files in the storage medium module and is also used for adopting the encryption strategy to carry out decryption on the files stored in the storage medium module according to encryption seeds formed by the recognition module and the file characteristic information. The recognition module is used for receiving information input by the user to generate the random seeds which are used as initial indexes of other secret keys.