53 results about "Secure coding" patented technology

The present invention discloses a construction for key management module functionality which provides for secure encoding and decoding of messages which are up to two blocks long. A method for generating an encoded value having a first encoded value part and a second encoded value part from an unencoded value having a first unencoded value part and a second unencoded value part, comprising the steps of: obtaining an initialization vector; and generating the first and second encoded value parts. The first encoded value part is generated by: generating a first result by encrypting the first unencoded value part; generating a second result by performing an exclusive or operation on the first result and the second unencoded value part; generating a third result by performing an exclusive or operation on the second result and the initialization vector; generating a fourth result by encrypting the third result; generating a fifth result by performing an exclusive or operation on the fourth result and the first unencoded value part; and encrypting the fifth result. The second encoded value part is generated by encrypting the second result.

The present invention relates to a method and system for secure coding of arbitrarily shaped visual objects. More specifically, a system and method are provided for encoding an image, characterized by the steps of selecting one or more objects in the image from the background of the image, separating the one or more objects from the background, and compressing and encrypting, or facilitating the compression and encryption, by one or more computer processors, each of the one or more objects using a single coding scheme. The coding scheme also is operable to decrypt and decode each of the objects.

The invention discloses a second-generation ID card online inquiry system based on a secure network, comprising an on-line service terminal, a secure network link module, an identification authentication and right management server and an identification relevant information database, wherein the on-line service terminal comprises a mobile multi-interface read module, a secure coding and decoding module and a terminal set, wherein the mobile multi-interface read module and the secure coding and decoding module are both connected to the same terminal set; the terminal set is connected with the identification authentication and right management server through the secure network link module; and a high-speed data link exists between the identification authentication and right management serverand the identification relevant information database. After the mobile multi-interface read module finishes reading a second-generation ID card, an identification information authentication inquiry request initiated from the terminal set by an operator is coded by the secure coding and decoding module and sent to the identification authentication and right management server by the secure networklink module, then information is obtained from the identification relevant information database after identification authentication and right judgment, and the information is fed back from the securenetwork link module to the terminal, thereby movably finishing the on-line authentication and inquiry of personal information with high security.

The invention relates to an information protection method and system of sensitive content data. The method comprises the first step of designing a genetic word stock file, wherein the file comprises characters and security codes of the characters, and a several-for-one mapping relation is formed between the security code of each character and a standard code of the character in a standard word stock; the second step of setting the genetic word stock file into an embedding-forbidding mode, and conducting whole encryption and afterwards storing the encrypted file into a server instead of conducting installing directly in an operating system of a client side; the third step of converting the standard codes in the standard word stock into the security codes of corresponding characters in the genetic word stock, and converting the characters of the standard codes corresponding to the sensitive content data which needs to be protected into the characters of the security codes and afterwards storing the characters; the fourth step of deploying a printing and monitoring service program in the client side, intercepting content data of a printed file in real time, and filtering out the protected sensitive content data. According to the information protection method and system of the sensitive content data, the problem in the prior art that the safety is relatively low existing in the aspect that data leakage is prevented through a safe word stock encryption technology is solved.

The invention provides an unconditional physical layer secure cooperative transmission method based on interference alignment technology. The method comprises the steps that networking and carrying out time-frequency synchronization are carried out at first, and a master control terminal is selected; all transmitting terminals sequentially transmit channel training signals; a receiving terminal carries out estimates a channel state and transmits the channel state to the master control terminal; the master control terminal calculates a precoding matrix and an interference suppression matrix, and then transmits the same to the other transmitting terminals and the receiving terminal; each transmitting terminal carries out binary secure coding on the original business flow, and the encoded bit stream is used as business input to carry out interference alignment transmission; and the receiving terminal carries out secure decoding on the received binary stream to acquire information stream of a user. Compared with the traditional scheme of encrypted and decrypted transmission based on keys, the risks brought by exchanging the keys are avoided firstly, secondly the error rate of an illegal user can approach 0.5 on the theory, so no valid information can be acquired from the information theory significance, and the complexity is relatively low.

The invention discloses an image compression secure coding method based on multidirectional sparse representation, comprising the following steps of: performing discrete dual-tree wavelet transform on an image and then performing directional filtering on each obtained high-frequency sub-band to obtain fine image directional sparse representation; performing rarefaction process on an obtained directional sub-band coefficient by using a noise shaping technology; interleaving the coefficients of each layer to ensure that the sub-band coefficients of neighbor layers have a parent child relation, and then performing quantitative coding on the coefficients by using SPIHT (Set Partitioning in Hierarchical Trees); and finally encrypting the coefficient symbols in a code stream in an XOR (Exclusive OR) manner and encrypting other partial code streams by using random arithmetic coding. As the code stream obtained by coding is encrypted by using the random arithmetic coding, the encryption efficiency is high, the effect is good, the security is high and no influence is brought to the image compression performance. The high-frequency components of the image are decomposed by using a directional filter, and therefore the directional representation is more flexible, sparser image representation is obtained, the image coding compression process is favored and the decoded image has better objective quality and subjective effect.

The invention relates to an information transmission method with combination of artificial scrambling and LDPC secure coding in a satellite-ground link, and belongs to the technical field of satellite communication. The method includes: step 1, calculating a state vector of a main channel; step 2, calculating a state information matrix of the main channel; step 3, performing LDPC coding on to-be-sent information; step 4, constructing artificial noise z orthogonal to the main channel; step 5, calculating a sending weight of the to-be-sent information, wherein the sending weight enables a private interruption probability to be minimum; step 6, continuously sending the coded to-be-sent information, and sending the artificial noise by employing a multi-antenna emission mode; and step 7, performing decoding by employing a BP decoding algorithm by a receiving end. According to the method, in an information transmission process, channel state information is introduced to LDPC coding so that the security and the reliability of communication are guaranteed; the coding method based on the channel state information is employed so that problems during the application of the conventional encryption algorithm in the satellite communication process is avoided; and the complexity of satellite secret communication is reduced.

The invention discloses a cross-site script attack defence method, a device, an apparatus and a storage medium. The method comprises the following steps: obtaining the content to be detected sent by the network side; matching the content to be detected with a preset set of attack characters to screen potential attack codes in the content to be detected; performing security encoding processing on the potential attack code to obtain a security code; replacing the potential attack code with the security code to convert the content to be detected into secure content; displaying the secure content.The invention solves the technical problem that the XSS attack can not be dynamically defended in the prior art, the preset attack character set can be configured according to user requirements to ensure that the content to be detected input by the user conforms to the application specification of the application programming interface so as to effectively prevent the technical effect of XSS attacks.

The invention discloses a method for establishing an unconditionally secure communication model based on combination of beam forming and security coding. The method comprises the steps that a legal sending user sends pre-coded and modulated signals, and an eavesdropping user receives the signals and calculates an eavesdropping bit error rate; security coding parameters are calculated, a legal receiving user sends a pilot frequency sequence, the legal sending user estimates a legal channel, information of the legal channel is extracted, SVD pre-coding is carried out on the signals subjected to security coding and modulation, and the signals are sent; the legal receiving user or the eavesdropping user receives the signals and carries out decoding processing and carries out judgment and demodulation on the decoded signals, security decoding is carried out on a demodulated binary bit stream, and transmitted signals or eavesdropped signals are acquired. The eavesdropping user lacks information of the legal channel, so that pre-coding processing of the received signals cannot be relieved, and the bit error rate is high. The method disclosed by the invention can well achieve establishment of an advantageous channel in an eavesdropping signal model, and ensure the legal user to receive signals under a low bit error rate.

The invention relates to a safe processing method for data delay transmission in a safe coding system. A queue used for storing data of a port collected in a delay time window is firstly defined, every time the system collects the data stored in the window, the data is recomputed once, the finally sent state data of the port is a result of all data in the time window which has computed once, and safety of the result is judged. Compared with the prior art, the method provided by the invention has the advantage of high safety in output data.

The invention aims at providing a channel polarization secure coding method based on robust soliton distribution, and the method comprises the following steps: firstly, a sending end codes to-be-sentinformation based on robust soliton distribution; then, Polar coding is executed for the to-be-sent information which is coded based on robust soliton distribution; and a normal receiving end and an eavesdropping end respectively perform Polar decoding for the received information, finally, the normal receiving end and the eavesdropping end respectively perform belief propagation decoding for thereceived information subjected to Polar decoding, and restore the sent information. Compared with the existing technology, the method provided by the invention can improve transmission rate of information transmission while guaranteeing security and reliability of information transmission under the premise of slightly increasing secure coding and decoding complexity, and consequently improves validity of information transmission.

The invention relates to a physical layer secure coding system based on Ethernet communication. The system includes a server, an FPGA module and an Ethernet communication auxiliary platform. The FPGA module includes a physical layer PHY chip, an MAC controller and an FIFO memory. The FPGA module achieves the function of secure coding and decoding. According to the physical layer secure coding system based on Ethernet communication, communication is realized through the Ethernet communication auxiliary platform. High efficiency, high speed and high performance are obvious advantages of the Ethernet. With the Ethernet as a communication platform, the data transmission rate of the whole system will not affect the work efficiency of the system. Better coordination between hardware and software is realized. The function of physical layer secure coding is completed.

The present invention provides methods and systems for use in malicious advertisement management. Methods and systems are provided in which, after an advertisement is determined not to present a security threat, whether initially or after removal any such threat, then a first modification is performed to code associated with the advertisement which may introduce a security coding. Further modification, which may breach the security coding, may indicate that the advertisement is more likely to present a security threat than if the further modification had not occurred.

The invention discloses a low-complexity and low-time-delay secure transmission method. In an edge computing system, edge computing equipment needs to carry out signal security coding before signal transmission to improve confidentiality of data transmission, a Wyner security coding scheme is adopted, the edge computing equipment carries out offline design optimization on a codeword parameter, andthe designed coding parameters depend on statistical channel information of legal communication links and illegal communication links. In the whole edge computing secure transmission process, the codeword rate parameter is kept unchanged. In an energy-limited edge computing network, edge computing equipment Alice provides services for a secret service terminal Bob and a public service terminal PRat the same time, power cooperation is carried out between a public signal and a secret signal, and the security throughput of the edge computing system is maximized on the basis that the public service quality is met. The method is simple in design, low in calculation complexity and suitable for communication scenes such as multimedia video data transmission.

The invention discloses a channel security coding method for resisting joint eavesdropping in relay transmission, which comprises the following steps that: 1) a source node S codes an original information sequence through an LDPC (Low Density Parity Check) code of which the dimension is M (1) * N check matrix to obtain a system code transmission codeword c (1) of which the length is N, and then modulates and transmits the obtained system code transmission codeword c (1) to a relay node R; 2) the relay node R decodes the received data to obtain an information sequence, encodes the information sequence through an LDPC code with a dimension of M (2) * N check matrix to obtain a system code transmission codeword c (2) with a length of N, and modulates and transmits the system code transmissioncodeword c (2) to a destination node D; and 3) the destination node D performs decoding solution according to the received information and a codebook used for transmission so as to recover an original information sequence, and the method can effectively improve the security of information transmission.

An embodiment of the invention provides a secret communication transmission method and device and electronic equipment. The method comprises the steps: obtaining to-be-transmitted original information, carrying out the coding of the original information through employing a Yongquan coding method, and obtaining a plurality of coding data packages and coding matrixes corresponding to the coding datapackages; respectively transmitting the plurality of coded data packets and the plurality of coding matrixes to different onion routes for transmission by using a reverse multiplexing method, whereinany coded data packet and the coding matrix corresponding to the coded data packet are transmitted separately. According to the method provided by the embodiment of the invention, the Yongquan codingmethod is used for safely coding the original information of the sending end, the coded data and the matrix data are separately transmitted, the reverse multiplexing technology is used for sending the coded data packet, and therefore the safety of the data is enhanced at the coding and decoding level; onion routing is also adopted to transmit each coded data packet and each coding matrix, encryption processing is also carried out in the transmission process, and the data security is also ensured in the transmission channel level.

The invention discloses an object trusted identity secure coding method. Original information of an object is segmented into one or more pieces of original data. The original data is encrypted to formone or more cipher identity quantity values. The cipher identity quantity values are publicized as public keys. Original attributes of the object are hidden, and verification and calculation also canbe carried out. The cipher identity quantity values are used as the public keys, so the possibility that original information is tampered and copied is prevented, the network application security ofan identity of the object is improved, and the identity is taken as the trusted identity on the network.

The invention discloses a secure coding and decoding method of railway transponder messages based on lightweight chaotic authentication encryption. The secure coding and decoding method comprises a dedicated lightweight chaotic authentication encryption method for transponder messages, a transponder message coding method based on authentication encryption, a corresponding decryption verification algorithm, and a transponder message decryption verification method based on the decryption verification algorithm. On the premise of maintaining the ETCS and CTCS standards, confidentiality, integrityand authentication protection is provided for the transponder messages, and security risks such as forgery, tampering and counterfeiting faced by the existing transponder messages are avoided. Meanwhile, in view of the limited computing resources of a transponder read-write device, a lightweight chaotic authentication encryption algorithm is used for providing lightweight information security protection for the transponder messages, so that the train-ground communication security of a transponder of a train control system is effectively enhanced.

The invention discloses a secure coding method, a decoding method and equipment. The method comprises the following steps: performing, by a first encoder, coding processing in at least one round of encryption operation after at least one round of encryption operation in n rounds of encryption operations and / or in at least one round of encryption operation in the n rounds of encryption operations in the process of performing the n rounds encryption operations on a plaintext by applying an encryption algorithm, wherein the code rate of the first encoder is 1, and n is an integer more than 1; andperforming, by a second encoder, coding processing on the plaintext acquired after the n rounds of encryption operations, thus acquiring a coded result, wherein the code rate of the second encoder ismore than 1. The embodiment of the invention provides a lightweight secure coding scheme, which can combine a lower complexity encryption algorithm and a lower complexity coding algorithm to achievea low complexity secure coding algorithm on the premise of considering the security of the secure coding algorithm, and the low complexity secure coding algorithm is suitable for being applied to a lightweight Internet of things.

The invention discloses a privacy protection method in an edge computing environment, which is realized based on security coding of an orthogonal vector and comprises the following steps: acquiring parameters of a network where security coding edge computing based on the orthogonal vector is located; partitioning input data of one side of a calculation task by using a task allocation algorithm, adding a random block code, and allocating to a corresponding edge node; calculating a base vector of a null space vector of the coding matrix, and sending a base vector of a part of null space to userequipment according to the parameter of the A; after a user inputs data, generating an online calculation demand and after receiving all intermediate results returned by edge nodes, enabling a user todecode the intermediate results by using the coefficient coding matrix to obtain a required result. In edge calculation based on security coding, privacy of both sides of calculation is protected byadopting linear coding and adding random blocks, and meanwhile, the random blocks added by a user side are designed by utilizing orthogonality of a null space vector, so that communication load and decoding complexity are reduced, and low-delay, efficient and safe edge calculation privacy protection is obtained.

The invention provides a code division multiple access (CDMA) secure coding and decoding method and system, and the CDMA secure coding method comprises the steps: receiving a first clock signal, and converting the first clock signal into an analog signal; receiving a data signal and a second clock signal, and performing differential double-phase coding on the data signal to obtain a coded digital signal; conditioning and amplifying the analog signal, and coupling the analog signal with the coded digital signal to obtain a required baseband signal; coding the baseband signal to obtain a baseband coded signal; and performing CDMA coding on the baseband coding signal to obtain a CDMA coding signal. According to the CDMA safe coding and decoding method and system, interconnection and intercommunication of European railway operation control systems can be met, and the problems that an existing European train operation control system is poor in anti-interference performance, only suitable for short-distance transmission, high in bit error rate, high in receiving sensitivity threshold, free of multipath receiving and the like due to the fact that FSK, PSK and other signal systems are adopted are solved.

The invention discloses a complexor design method based on secret key control. The method aims at solving the problem that a conventional Turbo code encoder does not have an encryption function, and the method enables an interleaver to be associated with a complexor. The method includes the steps of firstly setting the length of the interleaver as N and setting S as sequence of natural numbers with the length equal to the N, using a secret key to generate N-length random arrangement S1 of natural numbers, that is, S1= f (S, Key), and f is a random function, secondly, carrying out module six calculation to the S1 to obtain a random N-length senary sequence controlled by the secret key, and finally, rearranging the output sequence of a coding bit stream, outputting the coding bit stream, obtaining an encryption bit stream, using the same secret key to obtain the random N-length senary sequence as the same as a coding end in a demultiplexing process, then using the sequence to confirm a correct output sequence of the bit stream, and finally obtaining a correct decoding result.

Embodiments of the invention disclose a data transmission method and a related device. The method comprises the following steps: acquiring to-be-transmitted data for a high-speed magnetic levitation operation control system, carrying out fixed redundant coding on the to-be-transmitted data and generating first coded data corresponding to the to-be-transmitted data so as to achieve redundant codingof the data; then, coding the first coded data by using a feature code corresponding to the first coded data so as to generate second coded data corresponding to the to-be-transmitted data, thereby realizing unique coding of the data and further improving the security coding of the data; and then, calculating the check code of the to-be-transmitted data by utilizing the second coded data, whereinthe check code can be used for checking data in a message by the receiver, thereby ensuring the accuracy of the data in the transmission process. Moreover, the message adopted in the data transmission process carries the uncoded data to be transmitted, so the compressed transmission of the data is realized, and a bandwidth requirement on high-speed magnetic levitation 38G wireless communication is reduced.