67 results about "DECIPHER" patented technology

A method of detecting, comparing, blocking, and eliminating spam emails sent through email servers of Internet service providers (ISPs) or to email users' email-boxes. The method includes the steps of generating a spam decipher signature for each email in an ISP's mail server or a user's email-box, comparing newly generated spam decipher signatures to a server or user database containing spam decipher signatures of known spam emails to detect spam emails when there is a probability match at a pre-determined high percentage, and preventing the spam emails from going through the ISP's mail server or to the email user as non-spam emails. The method also includes the steps of updating a master spam decipher signature database by comparing spam decipher signatures in a new signature database with existing spam decipher signatures in the master database, incrementing a counter value of a matching spam decipher signature by the number of matches, and adding all new spam decipher signatures that have counter values reaching or exceeding a pre-set threshold and therefore are considered spam to the master spam decipher signature database. The method further includes the steps of initially loading the master spam decipher signature database to the ISP email server or the user's computer to establish the server or user database, and updating the server or user database with the master spam decipher signature database.

The invention discloses methods and devices for data encrypting and decrypting and a communication system. The method for data encrypting comprises the following steps: segmenting data into segment data comprising at least two segments; encrypting the segment data in parallel to obtain the ciphertext of the segment data; adopting a linear algorithm to calculate all the segment data in parallel to obtain a message authentication code; and obtaining encrypted data according to the ciphertext and the message authentication code. The method for data decrypting comprises the following steps: segmenting data to be verified to obtain ciphertext segments and a message authentication code; decrypting all segment ciphertext to obtain decipher text and decipher text segments; adopting the linear algorithm to calculate all the decipher text in parallel to obtain a check code; and judging whether the data to be verified is right or not according to the check code and the message authentication code.

The present invention provides methods for transmitting SyncML synchronization data. One is that the originator constructs a SyncML message after encrypting the user data to be transmitted and then transmits the data in an existing transmission way; the user data includes, but is not confined to, authentication information, terminal capability information and the data to be synchronized; the other method is that the originator encrypts the SyncML message in the transport layer before transmitting the message, and the recipient deciphers the received SyncML message from transport layer and processes the message subsequently. The two methods can be used either separately or together. If they are used together, the transmission of SyncML synchronization data is provided with double safety insurance. By using the present invention, user data can be transmitted safely without being intercepted by the third party.

The invention relates to a file ciphering technology. The invention provides a ciphering and decipher method based on a basic ciphering unit. The file ciphering comprises the following steps: the ciphering part divides the files into a plurality of data packets with the length of the basic ciphering unit; the data packets are ciphered; the data is filled until ciphering to the last one data packet, and the filled data is ciphered. The file deciphering method comprises the following steps: a. the deciphering part determines the deciphering algorithm and the length of the basic deciphering unit according to the ciphering algorithm and the length of the basic ciphering unit; b. the deciphering part determines the data length read for every time according to the basic deciphering unit, the ciphering data packets are deciphered and the deciphered data packets are returned; the filled data can be deleted after the last one data packet is deciphered. The invention can implement the ciphering for file of arbitrary format, can implement the simultaneous deciphering and using of the file, the invention can be applied to the content protection of the office system and the digital medium.

This invention discloses a data ciphering and deciphering method which randomly selects a random cryptographic key to replace positions to clear-text data, then dispatches a user cryptographic key to cipher the random cryptographic keys and the data layer by layer and outputs the cipher-text. Deciphering method: the random cryptographic key is recovered first, then the clear-text data position replaced vector is got and clear-text data are recovered by dispatching suitable user cryptographic key to output the clear-text finally. A device includes a cipher/decipher processor, clear-text cipher-text buffer memory for storing the clear-text cipher-text input data and inputting them to a processor, a memory for staring various data and inputting them to a processor, an output device for outputting the cipher-text.

The invention relates to an information security technology in information technology field, which concretely relates to binary code and decode of data. The invention belongs to sequence coding system; the essence is periodless multi-table code substituting method. It uses dynamic length variable code technology, a group of input data with fixed length (8 bits), the length of the output code is between 1 and 255, the size of the encrypted text is determined according to the state of the coding system. The state of the system will change after coding a group of plain text, and the initial state of the system is determined by the user key, the code analyzer is hard to determine the relation between the encrypted text and the plain text, thus the attacking method to each kind of system can be resisted effectively.

An autonomous robot mainly contains an image capturing device, an interpretation device, a synthesis device, and an audio output device. The image capturing device captures pages of graphical images in which appropriate musical information is embedded, and the interpretation device deciphers and recognizes the musical information contained in the captured graphical image. The synthesis device simulates the sound effects of a type of instrument or a human singer by synthesis techniques in accordance with the recognized musical information. The audio output device turns the output of the synthesis device into human audible sounds. The graphical image of appropriate musical information is prepared in a visually recognizable form. The graphical image can also contain special symbols to give instructions to the autonomous robot such as specifying an instrument.

The invention discloses a two-dimensional code based clothing industry client information management method. The card number information, the identity information and the body type information of a client are encrypted so as to code the encrypted information to generate a two-dimensional code; the two-dimensional code is typed into the VIP (very important person) information card of the client; and when the VIP information card of the client is used, the two-dimensional code is read to decode and decipher to obtain the client information. According to the two-dimensional code based clothing industry client information management method disclosed by the invention, data for describing the client identity information and measurement data for describing the client body type information are packaged into the two-dimensional code to make the VIP information card of the client; when the client customizes or purchase clothes, the client only needs to input the two-dimensional code in the VIP information card into the reading terminal of a clothes manufacturer or a store; and the system can automatically read the user body type data to customize. The method disclosed by the invention has the advantages of low cost, big information storage content and convenience in popularization, and the efficiency and the safety of the clothes industry service system can be greatly improved.

The invention provides a decoding method of enhancing an uplink physical channel by a time division synchronous code division multiple access system. The decoding method includes the following steps: step S301, when an enhanced uplink transmission time interval comes, user equipment determines a data type and a resource multiplexing mode transmitted in the current transmission time interval; step S302, the user equipment determines the length of a transmission block and the modulation type of the enhanced uplink service data; step S303, the user equipment determines the physical layer control channel parameters of the current transmission; step S304, a base station determines the total number of resources used by the user equipment; and step S305, the base station combines enhanced transmission format combined indication to obtain part of the length of a transmission block and the modulation type of service data and then carries out demodulation and decoding; wherein, the data type includes a dispatching service data type and a non-dispatching service data type. In this way, under the condition of no increment of channel load, the invention can avoid the caching of channel data, realize the synchronous demodulation of the channel and improve the receiving efficiency of the channel.

A cipher processing system is provided for allowing file access while maintaining the integrity without a user being conscious of the difference between files when the user accesses a file in a folder containing both a ciphertext file and a plaintext file. Thus, according to the present invention, if a folder stores both a ciphertext file and a plaintext file, the ciphertext file is attached with identification information (preferably, footer information) indicating that the file is a ciphertext file, so that the plaintext file and the ciphertext file can be differentiated from each other when the files are read. A deciphered file gained by removing identification information from a ciphertext file and deciphering the file is delivered to an upper-level application. If the read file is a plaintext file, decipher processing is not executed on the plaintext file but the plaintext file is passed to the upper-level application program.

This invention relates to a data protection method and a protection system. The method includes a cipher flow and a decipher flow, in which, the cipher flow includes the following steps: a safety chip generates a report cryptographic key and ciphers it to store it in hardware token. The data is ciphered with the report cryptographic key to be stored in the hardware token. The deciphering flow includes the following steps: The safety chip gets the ciphered report cryptographic key from the token and deciphers it to get the report key, the safety chip gets ciphered data from a hardware token and deciphers the data with the report cryptographic key. The data protection system includes a safety chip, a hardware token and a computer.

The invention related to computer technique area. It uses removable storage based on computer external bus interface as storage media for distributing software. The data with different security requirements are stored in three areas, that are common area, read only area and system area. The common area can be read out and written in. Using communication protocol of standard removable storage, can be accessed the common area and read only area. But the system area can be accessed only by special communication protocol defined between encipher and decipher modules on computer end and encipher and decipher modules on the end of removable storage. The removable storage itself possesses enciphering capability by hardware. The invention provides merits of high security, easy operation and lower cost.

The invention discloses sectionalization encipher-decipher algorithm, which is characterized by the following: adopting 10-bit number for clear text and secret text as basic arithmetic unit; adopting 10-subtraction method for deciphering course; making the digital sequence length of obtained 10-bit secret text; reducing the problem of secret text inputting time and operating quantity.

This invention relates to an AES cipher/decipher circuit multiplex Sbox module including a negating circuit, a first gating switch, a second gating switch, a ciphered affine transformation circuit, a deciphered affine transformation circuit and a control unit, in which, the first gating switch is connected with the input of the negating circuit, the deciphered affine transformation circuit is connected with high order end 1, the second gating switch is connected with the output of the negating circuit. The ciphered affine transformation circuit is connected with low order end o of the second gating switch and the control unit controls the two switches to gate high order end 1 or low order end o simultaneously. Besides, this invention also provides an optimizing method for AES cipher/decipher circuits.

This invention provides a method for the splitting and reproduction of video images including: the video image forms several reference frames and non-reference frames by encoding, among which, the splitting refers to extract a part or total compressed video image data in the above total or part reference frames, the extracted video compressed data are key contents, others are basic contents, which are stored or transmitted separately, a user decoder can split-join the key and basic contents to a complete original video image to play it if getting them the same time, if it cannot get the key content, then the decoded recovered image is wrong, which can protect the copyright of video images effectively not needing extra cipher/decipher algorithms.

A method for enciphering and deciphering image pattern includes dividing a frame of original image pattern to be a numbers of region randomly and rearranging said divided regions to form a frame of enciphered image pattern, enabling to do said process cyclically to let enciphered image pattern be changed essentially, restoring original image pattern by carrying out retrace course of rearrangement for realizing deciphering when it is required.

The invention discloses a method for encrypting, which combines random encryption and exhaustive method decryption. When the invention is used in encryption, a random password or a randomized algorithm are utilized to encrypt information, when the invention is used in decryption, decrypted programs can not guarantee that reduced secret keys or decryption algorithms can be correctly found out in one time, the decrypted programs need adopting an exhaustive method to try to decrypt for many times and to compare with password recognition information for many times, correct reduced secret keys or decryption algorithms can be found out, and the even decryption computational complexity when the information which is decrypted by the invention is decrypted is bigger for many times than that when the information is encrypted. The invention mainly encrypts backups of important information such as internal passwords, certifications and the like and certainly can encrypt information such as common files and the like.

The example of the invention discloses a method for concealing image error in a realization of video decoding, which comprises the following steps detecting whether encoding errors are occurred on a slice compressing data information, calculating the total number of the error macro module in the slice compressing data information if the encoding error is detected on the slice compressing the data information, generating a coding flow of a corresponding jumping-macro module according to the total number of the macro module, and encoding a coding flow of a corresponding jumping-macro module. The example of the invention further discloses a video decoder, a segment of a whole Skip code flow are coded by the coder to allocate into a sub-layer encoding to the Slice through the method for concealing image errors in the realization of video decoding and the video decoder which are provided by the invention, under the error condition of the slice compressing data information (Slice Date), thereby realizing the function of repairing error images.

The invention relates to information encryption technology. It provides an identity information encryption and decryption method and an identification system to overcome shortcoming of low security, easy embezzlement, duplication and malversation. Its steps are memorize encrypted identify information into carrier; ulteriorly, encryption and decryption devices are set in carrier to encrypt and decrypt input and output information; especially, random time key is adopted to encrypt transferred information. With a very powerful function of anti-false and anti-pilfer, the system especially adapts to commodity anti-false, identify identification and other field.

The hardware enciphering and deciphering virtual private network belongs to the field of information safety. Built-in PCI card is inserted into computer used as gateway to realize enciphering algorithm, deciphering algorithm, digital signature, identity confirmation, etc. During the mutual access among users in different subnetwork in virtual private network, the data passing through PCI controller, in which some available data flow enciphering algorithm cured in the card memory is adopted, is received by microprocessor and stored temporarily in memory, and the enciphered data are output via network card to reach safe and efficient communication among computers under VPN environment. The present invention is even safer than software realized VPN function.

A method for reconfiguring the marginalized decode data of hidden Markovian model (HMM) used in speed recognition features that the HMM transfer probability array is used to describe the dynamic characteristics of speech characteristic vector in time domain, the complete variance array is used to describe the relative characteristics between the components of the characteristic vector for Meizi band, and a data reconfiguring algorithm (VITDI) is used to reconfigured "lost vector". It can improve the noise robustness of speech recognition system.