31results about How to "To achieve the purpose of encryption" patented technology

The invention discloses a Chirp signal-based signal transmitting and receiving method for ultra wide band secret communication, which relates to a signal transmitting and receiving method for the ultra wide band secret communication and solves the problem that a conventional communication method cannot ensure the security of communication in the communication. The Chirp signal-based signal transmitting and receiving method for the ultra wide band secret communication comprises a transmitting process and a receiving process, wherein the transmitting process comprises the following steps: mapping digital information output by an information source to obtain binary modulation information, and sending and emitting a pulse signal of a current time according to a set parameter by a modulation Chirp signal generator; and the receiving process comprises the step that: in a system set time, a receiving end samples the ith modulation signal, performs fractional Fourier transform and parameter adjustment on the ith modulation signal, adds and synthesizes the signals to obtain a synthesized signal and demodulates and outputs the synthesized signal. The method is suitable for the process of the ultra wide band secret communication.

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 invention provides a secure gateway device of a vehicle and a secure communication method, and belongs to the field of secure communication. The secure gateway device includes: a microcontroller storing a partial code of a complete program of the secure gateway device, and an encryption chip which stores residual codes which form the complete program together with the partial codes, so that anexternal module needs to be authorized by the encryption chip to read the complete program when accessing the secure gateway device. The invention also provides a secure communication method appliedto the secure gateway device. According to the secure gateway device and the secure communication method, the communication security of the gateway of the vehicle can be improved.

The invention is applied in the field of computer software, and provides a file encryption protection method and a file encryption protection device. The method comprises the following steps of: storing a file to be protected into an image file; and generating the image file stored with the file to be protected. According to the embodiment, by storing the file to be protected such as a resource file or the like into the image file, the file to be protected is not easily compiled or embezzled; and if the image file is not decoded, only a picture is seen, so the purpose of encrypting the file to be protected can be well fulfilled.

The invention discloses an encryption method of biological features, an encryption matching method and an encryption system, and an encryption matching system. The encryption method comprises the following steps: respectively computing similarity and/or difference of a to be identified biological feature with each feature base in N feature base spaces to obtain a corresponding data set, thereby realizing the encryption on the biological feature; respectively computing the similarity and/or the difference of two to be identified biological features with each feature base in the feature base space, comparing the computing result in the one-to-one correspondence, thereby realizing the matching of two to be identified biological features. The to be identified biological feature is converted into a group of abstract code data, the group of code data supports the one-way encrypted storage, the matching of the biological feature based on the code data or the cipher text is realized, the requirement of the clear text of the biological feature is avoided, and the security of the biological feature on the identification is guaranteed.

The embodiment of the invention provides an authority management and data protection method and device applied to a database, equipment and a computer readable storage medium. The method comprises the following steps: according to the type of a user, performing unified authorization on a table in a database and rows and fields in the table, and constructing a user permission table; receiving an SQL statement of an access database, and obtaining an operation authority table corresponding to an access user at the same time; calling an operation authority of the access user on a table in a database and a field and a row in the table from the authority table; modifying an SQL (Structured Query Language) statement according to the operation authority of the access user on a table in a database, a field and a row in the table and the SQL statement accessing the database; and accessing the database through the modified SQL statement to obtain data content corresponding to the authority of the access user. In this way, the authority of the physical data storage system is improved, and data protection can be achieved without modifying the data content of the physical data storage system.

The invention provides an encryption method, an application lock and electronic equipment. The encryption method comprises the steps of receiving an unlock password input by a user, unlocking the application lock when the unlock password input by the user is identical to a preset unlock password, and displaying a to-be-encrypted file selection interface; determining a to-be-encrypted file throughthe to-be-encrypted file selection interface; migrating the to-be-encrypted file to a preset private storage space from an original storage path. In this way, the to-be-encrypted file is migrated to the preset private storage space from the original storage path without encrypting a whole application program storing the to-be-encrypted file, and therefore the purpose of encrypting one or more files separately is achieved.

The invention discloses a data encryption transmission method, relates to the technical field of data encryption, and solves the technical problem of low data encryption and transmission security caused by adopting a fixed key to encrypt and decrypt data in the prior art. The plaintext data is divided into a plurality of sub-data according to the set unit quantity, the plurality of sub-data are numbered, the number and the corresponding sub-data are reordered according to the natural sequence, the number sequence and the data sequence are obtained, the number sequence and the data sequence are encrypted through different secret keys, and the purpose of data encryption is achieved. The safety of the data is improved through double encryption; according to the method, before the numbers and the corresponding sub-data are reordered, the position feature tags corresponding to the numbers are obtained, the reference nodes are randomly selected, and the reference nodes can be quickly determined according to the number sequence; according to the invention, the data cracking difficulty is improved, and the data security is further ensured.

The embodiment of the invention provides a biological feature recognition method, device and system for privacy protection and electronic equipment. According to one specific implementation mode, themethod comprises the steps: acquiring an initial image corresponding to a target biological feature; performing convolution processing on the initial image by using a target convolution neural networkto obtain a convolution image; transmitting the convolution image to an identification end to enable the identification end to perform deconvolution processing on the convolution image by using a target deconvolution neural network to obtain a target image used for biological feature identification. A distance value between the convolution image and the initial image is greater than a first threshold; and the distance value between the target image and the initial image is smaller than a second threshold value.

The present application discloses a picture encryption and decryption method and apparatus. The method comprises the following steps: determining a picture to be encrypted; determining a second key map in the first key map, wherein the first secret key map is used for encrypting a picture to be encrypted by the three primary color values of pixel points in the first secret key map, the second secret key map is a first rectangular area formed by taking a designated point in the first secret key map as a vertex of the first rectangular area and taking a length and a width of the picture to be encrypted as a length and a width of the first rectangular area; the pixel points in the picture to be encrypted are encrypted according to the three primary color values of the pixel points in the second secret key map to obtain the encrypted picture. The present application solves a technical problem of picture information disclosure due to a lack of effective picture encryption means.

The invention discloses an image encryption and decryption method based on novel two-dimensional fractional order chaotic mapping, and the method is characterized in that during encryption, S1, a fractional order chaotic signal is generated; s2, scrambling the original image by using the fractional order chaotic signal; s3, selecting a secret key image, and encrypting the scrambled image pixel value by using the fractional order chaotic signal and the secret key image; during decryption, I, the pixel value of the encrypted image is decrypted by using the chaotic signal sequence and the secret key image; and II, recovering the pixel position of the encrypted image by using the chaotic signal sequence. Fractional order two-dimensional TFCDM chaotic mapping is used for generating a chaotic sequence, then discrete chaotic signals are used for scrambling image pixels and diffusing pixel values for encryption, the discrete chaotic signals generated by a new mapping formula are more complex in structure and higher in randomness, the complexity of an encryption algorithm is higher, the fractional order is added as a secret key, and the encryption efficiency is improved. The algorithm has the advantages of larger key space, higher attack resistance and higher security.

The embodiment of the invention provides a method and device for protecting security of video data and a computer storage medium. A user terminal sends a video stream address request for obtaining target video data to a video server, receives a video stream address and I-frame scrambling code information of the target video data sent by the video server, and stores the I-frame scrambling code information, wherein the I-frame scrambling code information is used for scrambling an I frame in a video stream; and the user terminal acquires a current video stream added with the I-frame scrambling code information through the video stream address, and decodes and plays the current video stream by taking the stored I-frame scrambling code information as an authorization code, and the current videostream is a part of data of the target video data. According to the method and device for protecting the security of the video data and the computer storage medium, the scrambling code information isadded based on the video key frame I-Frame to achieve the purpose of video encryption, and effective theft prevention can be achieved.

The invention relates to a method used for extracting fixed-length spatial location characteristic numerals from information in the information security techniques, which comprises the following steps: parameter information of a fixed-length spatial location is obtained; decimal expression values of the information in a code table are obtained by a symbol set in a computer; a converting method from the information to the spatial location is obtained; the fixed-length spatial location characteristic numerals are analyzed; and the input information is processed by the computer or other equipments with computing and storing functions, thus obtaining the spatial location characteristic numerals which are corresponding to the input information. The method can simply, intuitively and efficiently extract the unique fixed-length spatial location characteristic numeral which are corresponding to the information from the information; by the method, the same effect can be achieved by judging the spatial location characteristic numerals when the user judges whether the information is modified in a transmission process; and as the spatial location characteristic numerals have fixed length and certain regularity, the efficiency is greatly improved, when the processing of the information including encryption, identification and judgement is carried out, and the method has strong practicability.

The invention discloses a data processing method and device, electronic equipment and a computer readable storage medium. The method comprises the following steps: acquiring to-be-encrypted data; establishing a preset number of first virtual particles according to the to-be-encrypted data; placing the first virtual particle at a predetermined position in the virtual plane; distributing a first preset impulsive force to the first virtual particle, so that the first virtual particle does irregular motion in the virtual plane; under the condition that any two or more than two virtual particles in the first virtual particles collide with each other, first position coordinates of collision are determined; and encrypting the to-be-encrypted data according to the first position coordinate. According to the method and the device, the technical problems that the encryption mode is simple and the encrypted data is easy to crack when encryption protection is carried out on the to-be-encrypted data in the prior art are solved.

The invention discloses a method for achieving Moire pattern anti-counterfeiting in halftone areas of images. The method comprises the following steps: (1) preparing original images and anti-counterfeiting information; (2) carrying out halftone processing; (3) encrypting the anti-counterfeiting information; and (4) synthesizing images. According to the method, selection ranges of the original images and the anti-counterfeiting information are larger; the anti-counterfeiting information is encrypted and decoded in the images; the concealment performance and the extraction and recognition performance are relatively high.

The invention discloses a security control system applied to a mobile terminal. A main board of the mobile terminal is provided with a security chip. The system comprises a chip driving module which is connected with the security chip and is used for driving the security chip to generate security keys, and types of the security keys at least comprise an asymmetric key, a transmission key and a work key; a key management module which is connected with the chip driving module and is used for driving the chip driving module to employ the key type corresponding to the data information according to the content of the data information for encryption and decryption processing on the data information; and a security control module which is connected with the key management module and is used for sending a control instruction to the key management module for encryption processing on the data information, and the control instruction is used for controlling the key management module. The system solves technical problems of poor data security and easy tampering caused by only soft encryption processing on the data existing in a mobile terminal in the prior art.

The invention discloses preparation and application of a photonic crystal material with a responsive invisible pattern, and belongs to the technical field of nano materials and functional polymer materials. A hollow silicon dioxide photonic crystal is prepared by taking polystyrene microspheres as a template, and then areas with different hydrophilicity and hydrophobicity are selectively constructed on the hollow silicon dioxide photonic crystal through a Michael addition reaction, so that an invisible pattern capable of selectively responding to water vapor is formed. The prepared modified hollow silicon dioxide photonic crystal material with an invisible pattern can be used for moisture detection and other solvent detection, can display obvious patterns with different colors within 1 second under the action of dynamic moisture, has long-term stable high responsiveness, and has no obvious error after being repeatedly used for 100 times. The method provided by the invention has a better application prospect in the fields of preparation of polystyrene microspheres, hollow silicon dioxide microspheres and photonic crystals thereof, preparation of patterns, detection of various solvents and steam thereof and the like.

The invention discloses a key generation method and device. The method comprises the steps that at least two gene banks are obtained from a first system to be recombined, a target gene bank is obtained, each gene bank comprises a secret key and offset, and the secret keys and the offset are used for encrypting data; intercepting a gene pool with a preset length from the target gene pool to obtain a target key and a target offset; and encrypting the target key and the target offset. According to the method and the device, the technical problem that the security of data protection is not high enough due to a traditional data desensitization mode is solved.

The invention relates to the technical field of optical transmission, and discloses a multi-core optical fiber transmission method based on high-dimensional constellation multi-level encryption, which comprises the following steps of: 1) performing off-line digital signal processing on original data to generate an encrypted signal, and importing the encrypted signal into an arbitrary waveform generator to perform digital-to-analog conversion at 25GSa/s; and 2) amplifying the radio frequency signal through an electric amplifier before the radio frequency signal is injected into the Mach-Zehnder modulator for intensity modulation. According to the multi-core optical fiber transmission method based on high-dimensional constellation multistage encryption, a spherical encryption high-security optical transmission method is designed, so that signals on a transmission channel have a property similar to random noise, the purpose of information encryption is achieved, the difficulty of stealing information by an illegal ONU is greatly improved, and the security of the ONU is improved. Therefore, the overall safety of optical network transmission is improved, and meanwhile, the seven-core optical fiber is adopted for transmission, so that the transmission capacity is greatly improved.