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7620198 |
Watermark coding method and recording medium thereof
A watermark coding method and its recording medium utilize image interleaving and wavelet-based transformation to enhance the robustness of the image. The watermark series to be inserted is...
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7616765 |
Method and system for generating shared information
A sender sends original random-number data to a receiver through a quantum channel. The receiver generates a raw key from information received through the quantum channel and notifies the received...
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7613302 |
Systems and methods for compression of key sets having multiple keys
Systems, methods and modulated data signals are described herein that provide an efficient way to derive a single key from which a user can extract virtually any number of data encryption keys. A...
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7602911 |
Method and system for enhancing cryptography-based security
As part of a cryptographic protocol, or in addition to it, a computer may participate in a cryptographic key generation protocol. The cryptographic key generation protocol may be such that it...
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7600121 |
Message security
To provide a secure, effective but simple message handling, a method is provided for transmitting an electrical message, from a first user having a first terminal to a second user having a second...
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7599976 |
System and method for cryptographic key generation
A system and method for generating a random, unpredictable cryptographic security key by the use of a memory device, such as a flash RAM memory chip, internal to a computing device. The system and...
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7593526 |
Method and apparatus for compressing rabin signatures
A method and apparatus are disclosed for compressing Rabin signatures. The disclosed compression scheme compresses a Rabin signature, s, for a user having a public key, n, based on a continued...
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7590865 |
Method and apparatus for restriction use of storage medium using user key
A method and apparatus for restricting the use of a disc are provided. In this method, first, lead-in data is read out from a loaded disc. Then, a user key is read out from a lead-in area of the...
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7587047 |
Chaos generator for accumulation of stream entropy
A chaos generator for accumulating stream entropy is disclosed. The chaos generator includes a random source coupled to an entropy accumulator that is configurable for generating a binary random...
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7580472 |
Generation and detection of non-binary digital sequences
Method and apparatus for generating ternary and multi-valued Gold sequences, are disclosed. Also methods to detect ternary and multi-valued sequences are disclosed. The detection can be performed...
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7568100 |
Steganographic method and device
An apparatus and method for encoding and decoding additional information into a stream of digitized samples in an integral manner. The information is encoded using special keys. The information is...
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7567672 |
Cryptographic communication system
In a cryptographic communication system, a prover is connected through a channel to a verifier. Elements a, b, c, d of a finite group are used as a public key and a parameter “x” as a private...
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7565545 |
Method, system and program product for auditing electronic transactions based on biometric readings
Under the present invention a biometric reading, an audit point identity and transaction information are collected for each electronic transaction. Upon collection, the biometric reading, audit...
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7558387 |
Gathering randomness in a wireless smart card reader
A device coupled to a smart card reader may request random data from a smart card inserted into the smart card reader, and the smart card reader may incorporate the random data into its randomness...
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7551737 |
Cryptographic keys using random numbers instead of random primes
A system and method for providing cryptographic keys which are usable in a network of connected computer nodes applying a signature scheme. The method employs: generating a random secret key usable...
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7551056 |
Use-authorization device for security-related applications
This description is given of a use-authorization device for security-related applications, in particular access control to secure areas or securing vehicles with a user operated key unit for...
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7542570 |
Information encryption transmission/reception method
An information encrypting transmission and reception method in an information transmission and reception network composed of a plurality of senders and receivers having computers being connected...
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7526088 |
Code generator and device for the synchronous or asynchronous and permanent identification or encoding and decoding of data of any particular length
A code generator includes a plurality of storage elements (such as flip flops) connected to form a code-producing series, wherein the output of the final storage element in the series in connected...
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7526087 |
Random number generator
A random number generator. The random number generator includes a noise source, a circuit controlling random current consumption, and a circuit generating random bits. A noise voltage output from...
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7512241 |
Method for generating pseudo-random keys
Provided is a method to generate sub-keys based on a main key in a case in which, each sub-key gives no information to recover the main key. The method has the steps of obtaining a first value by...
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7509500 |
Random number generation for encrypting cellular communications
In wireless communications, transmission devices require continuous supplies of random data for encryption processes. The invention provides a method for generating a continuous pool of truly...
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7508945 |
Self-corrector randomisation-encryption and method
Method and system wherein that once the input data sequence (X) and the control block (K) have been supplied, the method and system generates always a sequence of randomized-encrypted data (A)...
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7506178 |
Tamper-resistant re-writable data storage media
A cartridge handling system and method are provided to initialize a data storage cartridge having rewritable media and a cartridge memory for tamper resistant write once recording. During...
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7505585 |
Method of generating cryptographic key using elliptic curve and expansion in joint sparse form and using same
A method of generating a cryptographic key between two users. First, the users select an elliptic curve. Next, the users select a point P on the curve. Next, the first user selects integers r a ...
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7502468 |
Method and system for generating a cryptographically random number stream
A method and system for generating a cryptographically random number stream ( 100 ) is provided. A system includes a module ( 102 ) configured to provide at least two statistically random number...
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7496616 |
Method, apparatus and system for resistance to side channel attacks on random number generators
A random number generator (RNG) resistant to side channel attacks includes an activation pseudo random number generator (APRNG) having an activation output connected to an activation seed input to...
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7493429 |
Communication of information via a side-band channel, and use of same to verify positional relationship
The present invention provides for trusted side-band communications between components in a computer system, so that use of the system bus may be avoided. Two components may be connected by means...
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7490246 |
Method for encryption of data based on an iteration of a stored encryption key
A method for encryption and decryption of data items is provided by defining a cipher key based on variables in a Chaotic Equation. The method includes selecting a Chaotic Equation from a set of...
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7483536 |
Mini time key creation method
To provide a method and a system for creating a mini time key from a time key, a plurality of mini time keys are created within a unit time period. First, a unit time decryption key is prepared...
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7480687 |
Pseudorandom number generator for a stream cipher
A pseudorandom number generator includes a unit for providing a number of 2n sequences of numbers, n being greater than or equal to 2. The sequences of numbers are combined by a unit such that at...
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7464265 |
Methods for iteratively deriving security keys for communications sessions
Disclosed are methods for a client, having established one set of security keys, to establish a new set without having to communicate with an authentication server. When the client joins a group,...
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7457413 |
Method and device for encrypting a message
A method and a corresponding device for generating true random numbers for use in encryption of a message for secure transmission of said message from a sending device to a receiver, or for...
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7454017 |
Information processing unit
An object of the present invention is to a provide tamper resistant information processing unit that is used as an IC card with a high level of security. To achieve the above-mentioned object, the...
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7450723 |
Method and system for providing for security in communication
A method (and system) of securely communicating, includes using one of a preliminary secure transmission and exchange or acquisition of secret information that provides parties with a random...
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7436956 |
Document encryption
Encryption of documents is used to restrict access to such documents to those users who have the appropriate decryption keys. The encryption of documents on public web servers hitherto has...
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7430292 |
Methods and systems for securing information communicated between communication devices
A system is provided for generating information for secure transmission from a first device to a second device. The system comprising a key scheduler for generating a dynamic secret key, a...
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7409556 |
Hybrid digital watermarking for video authentication
A hybrid digital watermarking system for video authentication includes an authenticated acquisition subsystem for digitally watermarking video data and a video management subsystem in signal...
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7409062 |
Method and device for the generation of checkable forgery-proof documents
The invention relates to a method and a device for the generation of checkable forgery-proof documents with an externally supplied cryptographic module, whereby the checking of authenticity of the...
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7406175 |
Key generator device, encoding/decoding device, and key generation method
Disclosed is a key generator, which assures the security of a key by preventing a circuit designer and other persons from readily knowing the value of the key. Random number generator circuits (...
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7401223 |
Authentication chip for authenticating an untrusted chip
A trusted authentication chip for use in authenticating an untrusted authentication chip; the trusted authentication chip including a random number generator, a symmetric encryption function and...
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7394902 |
Encryption apparatus, decryption apparatus and encryption system
The present invention pertains to a transmission apparatus for generating an encrypted text by encrypting a plaintext, which includes a parameter storage unit for storing a random parameter (the...
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7394901 |
Method for exchanging authentication information between a communication entity and an operator server
An exchange of information between a communication entity e.g. a mobile telephone and the operator server upon which it is dependent, in order to carry out authentication operations by exchanging...
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7389424 |
Technique for distributing software
A computer program product and method for installing downloaded software on a client system over a network is described. The product and method include generating an access key by receiving an...
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7376235 |
Methods and systems for frustrating statistical attacks by injecting pseudo data into a data system
Disclosed are methods and systems for frustrating statistical attacks. A sender and receiver agree upon an encryption and integrity encoding scheme. For each “real” data packet, the sender...
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7373519 |
Distinguishing legitimate modifications from malicious modifications during executable computer file modification analysis
Prior to a modification of an executable computer file ( 101 ), a modification analysis manager ( 111 ) stores ( 1101 ) content concerning a specified number of specified sized blocks ( 115 ) of a...
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7369658 |
Secure modulation and demodulation
A system and method are disclosed for securely transmitting and receiving a signal. A nonlinear keying modulator is used in the transmitter to encrypt the signal using a nonlinear keying modulation...
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7366299 |
Method for encrypting and decrypting data using derivative equations and factors
A data cryptographer encrypts and decrypts character data of any given length using derivative equations and factors. The use of factors and derivative equations introduces the randomness required...
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7359513 |
Quantum cryptography protocol
An apparatus and method for implementing a quantum cryptography system encoding bit values on approximations of elementary quantum systems with provable and absolute security against photon number...
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7359509 |
Method and system for generation of cryptographic keys and the like
A method, and deterministic random bit generator system operating in accordance with the method, for generating cryptographic keys and similar secret cryptographic inputs which are hard to guess. A...
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7352861 |
Digital electronic component which is protected against electrical-type analyses
This invention relates to a digital electronic component which is protected against electrical- and/or electromagnetic-type analyse). The inventive component comprises: a synchronous element ( 10 )...
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