49results about How to "Increase the difficulty of decryption" patented technology

The invention relates to a data encryption method and a system. The data encryption method is characterized in that raw data is decomposed into at least two parts of data according to a preset function relationship. A data encryption storage method is characterized in that the preset function relationship is decomposed into at least parts of data, and the disassembled data is respectively stored in different memories. A data encryption transmission method is characterized in that a sending end decomposes raw data A into at least two parts according to the preset function relationship; the two parts are sent to a data receiving end via different data transmitting channels; and the data receiving end respectively receives the data, and combines and reduces the data into the raw data A according to the corresponding function relationship. As various combination modes are provided, the decryption difficulty is high after encryption, and the original encryption index is enhanced by times to guarantee the encryption effect of numbers. Only disassembly is required, and therefore, good encryption effect is achieved. In addition, the data encryption method has the advantages of low calculation amount and high encryption and decryption efficiency.

The invention discloses a file encryption method, a file decryption method, a file encryption device and equipment. The method comprises the following steps: obtaining a to-be-encrypted file; generating a secrete key, an offset value and a sampling value; determining the to-be-encrypted field in the to-be-encrypted file according to the offset value and the sampling value; and encrypting the to-be-encrypted field according to the secrete key. According to the invention, the file encryption efficiency can be improved.

The invention relates to a data encryption reporting method and device and a data decryption method and device. The method comprises the following steps: obtaining buried point data to be reported, and converting the buried point data into a corresponding data string; generating a key corresponding to the data string; encrypting the data string according to the key to obtain first encrypted data;encrypting the key according to a preset first public key to obtain second encrypted data, wherein the second encrypted data carries a first public key identification; combining the first encrypted data and the second encrypted data to generate first target encrypted data, and sending the first target encrypted data to a server. Based on the cryptography technology, the method realizes the purposeof encrypting the buried point data to be reported, ensures the security of data transmission, avoids the data being stolen, and thus improves the security of the data; at the same time, the generated key is encrypted to further improve the security of the data.

The present invention relates to the technical field of optical devices based on an artificial metasurface structure, more specifically, the invention relates to a metasurface structure design methodrealizing multi-dimensional optically manipulative image transformation. A metasurface structure composed of structural units is constructed on a transparent substrate; pixels of the metasurface structure are formed by the coherent interference among the structural units; a Jones matrix J is obtained for the structural unit with a rotation angle of phi; according to the incident light acting on the structural unit, a scattering factor of the incident light is obtained on the basis of the Jones matrix J of the structural unit; considering the pixels composed of the n structural units, when theincident light is incident on the transparent substrate at the incident angle theta, the wavelength lambda and the polarization state sigma, the intensity of the pixels of the metasurface is formed bythe coherent interference of all the structural units; and the multi-dimensional optically manipulative image transformation function of the metasurface structure is realized. The invention can realize the image transformation with any multi-dimensional optical parameters and solves the image crosstalk problem.

The invention provides an industrial network data isolation method, a device and a storage medium. The method comprises the following steps: receiving a message sent by an external management network side host, and determining the type of the message under the condition that the source IP address of the message belongs to the trusted source IP address range; under the condition that the type of the message is an instruction message, determining a danger level of the instruction message; under the condition that the danger level of the instruction message is lower than a preset danger level, sending the instruction message to an industrial system network side host; receiving industrial data sent by the industrial system network side host, performing data encryption on the industrial data, and sending the encrypted ciphertext and the key to the external management network side host to enable the external management network side host to decrypt the ciphertext; wherein the safety level of the external management network is lower than that of the industrial system network. The isolation effect of data isolation of an industrial system is improved.

The embodiment of the invention discloses a user data encryption method and device. The method comprises the steps of acquiring user data to be encrypted, using a first secret key set for encrypting the user data to obtain the encrypted user data, using a second secret key set for encrypting secret keys in the first secret key set to obtain the encrypted first secret key set, updating the encrypted user data to a server to be stored, storing the encrypted first secret key set locally, and deleting the first secret key set. The user data encryption method and device are used, even though a hacker obtains the encrypted user data and the encrypted first secrete key set, the encrypted user data can not be decrypted through the encrypted first secrete key set to obtain original user data, the decryption difficulty of the user data is improved, and therefore the safety of the user data is improved.

The embodiment of the invention discloses an encryption method, device and equipment based on features of information and a storage medium, and the method comprises the steps: obtaining a target function for describing information, and the feature information of to-be-processed target information; dividing the target information according to the feature information of the target information to obtain at least two pieces of sub-information; obtaining coordinate information corresponding to each piece of sub-information in the at least two pieces of sub-information according to the target function; encrypting the coordinate information of each piece of sub-information in the at least two pieces of sub-information to obtain a ciphertext of the coordinate information corresponding to each piece of sub-information; and determining the ciphertext of the coordinate information corresponding to each piece of sub-information as the ciphertext of the target information, and storing the ciphertext of the target information in a blockchain network. By adopting the method, the security of the target information can be improved, the method is suitable for the field of smart medical treatment, and the construction of smart cities can be further promoted.

The invention relates to the field of computer scrambling coding theory and communication, and provides a multiparameter three-dimensional digital encryption method, which includes the following steps: based on original data in a computer storage and according to the arbitrary carry number and integer computational formula, a plurality of encryption keys of original data can be obtained through the FPGA, then the original data can be stored in a three-dimensional coordinate enciphered data represented by encryption keys, and besides an encryption key and original data storage sequence linear list is formed and communicated with enciphered data through a network, so that the data encryption is realized. The encryption method adopts a simple computational formula, has many encryption parameters and great difficulty in decryption, and overcomes the deficiencies that the former asymmetric encryption computational formula is complex, is limited to word length and causes high possibility of forming decimals as no decimal is formed in the calculating parameters.

The invention discloses an anti-fake tracing method based on a hyper-elliptic curve cryptosystem. The anti-fake tracing method comprises the following steps: setting a production enterprise code, a date code and a specification code; performing encryption conversion on the production enterprise code, the date code and the specification code through a conversion method of system conversion and section partition; performing permutation and combination on section identification codes and authentication type codes in the production enterprise code, the date code and the specification code and generating a check code; taking an elliptic cure cryptosystem as a public key infrastructure platform, designing the tracing method and using a C/S architecture; a system distributes a public key and a private key to a handheld device, and during decoding, the handheld device inquires the public key and the private key to a server, compared with the existing anti-counterfeit technology, the anti-fake tracing method based on the hyper-elliptic curve cryptosystem provided by the invention has the advantages of being large in data volume and difficult to be imitated; besides, the security, the uniqueness and the unduplicatedness of data are guaranteed, the decoding difficulty is increased and the anti-falsification is strong.

The invention provides a control method and system for an engine control unit to manage a loan vehicle. The control method comprises the following steps: GPS equipment receives a command sent by a management platform; a search request command is sent to ECU; the ECU generates a random number for encryption verification and returns an encryption verification result after receiving a search requestcommand sent by the GPS equipment; the GPS equipment sends heartbeat or a command to the ECU according to an encryption verification result returned by the ECU; and after receiving the heartbeat or command, the ECU responds to and executes the successfully encrypted related command of the GPS equipment, and sends the execution condition to the GPS equipment. Due to a random number generation function and an algorithm function for generating random sequence, the difficulty of artificial decryption is increased, and encryption interaction is strict, and cracking is not easy; and command receiving and engine operation condition controlling can be effectively achieved, and effective supervision on loan purchasing vehicles is achieved, and the control method is suitable for large-scale application.

The invention relates to a safety authentication method and system based on an HTTP protocol. The method is characterized in that an encryption algorithm is randomly selected from a password algorithmlibrary with a highly-customized non-standard irreversible password algorithm library in a table authentication manner based on the Http protocol in order to perform irreversible decryption on a userpassword in conjunction with a unique random code generated once a client accesses a server. The encryption method is a non-standard and highly-customized method, so that a safe authentication mechanism is realized; various attacks occurring in basic authentication and digest authentication are avoided; and password cracking and playback authentication can be effectively prevented.

The invention relates to the technical field of data security, in particular to a chain key exchange method, a client, a server and a system. The method comprises the following steps: enabling a client to generate a first public key and a first private key; sending the first public key to a server, and receiving a second public key sent by the server; generating an initial vector, and encrypting the initial vector by using a second public key to obtain a client ciphertext; randomly cutting the client ciphertext into N parts, and carrying out distribution and exchange with a server to obtain server sub-ciphertext; and combining the server sub-ciphertext into a server ciphertext, and decrypting the server ciphertext by using the first private key to obtain a session key. On the basis of an original chain key exchange protocol, corresponding improvement is made for possible man-in-the-middle attacks, traditional halving transmission is abandoned, an N-time chain key exchange algorithm is adopted, the encryption strength of data is greatly improved, attackers cannot crack the data within the effective time of information. And the possibility that the secret-related information is cracked is reduced, and the data security is ensured.

The invention discloses a three-state magnetic control matrix module and a coded lock applying the same and belongs to the technical field of magnetic effects. The three-state magnetic control matrixmodule comprises a magnetic matrix and a trigger part matched with the magnetic matrix, the magnetic matrix is formed by arranging and combining N magnetic control logical units, wherein N is larger than or equal to 1, and the magnetic matrix is formed by the multiple magnetic control logical units. The magnetic control logical units are connected with different voltage inputs correspondingly in virtue of rotation of a permanent magnet, and different voltage three-state signals are output correspondingly. The unlocking difficulty of the coded lock is further improved by achieving a three-stateinput function through the three-state magnetic control matrix module, decoding difficulty is improved directly due to input complexity and diversity, and property and personal safety is ensured.