| 6798883 |
Method of testing a randomizer |
| Sep-28-2004 |
A method of testing a randomizer having at least one source of probabilistic data and a device for mixing the probabilistic data to form random data, where the probabilistic data includes at least two... |
| 6795555 |
Encryption key exchange protocol |
| Sep-21-2004 |
The calculation of encryption keys is a processor intensive undertaking that is not suited for "thin client" terminal devices typically used for session applications in an Internet Protocol network. The... |
| 6792108 |
Aperiodic encryption for digital data |
| Sep-14-2004 |
For stream or block ciphers, a sequence generator using a quasi-crystal function is used to prepare an encryption or decryption pad. Various techniques for generating purely aperiodic sequences using quasi-crystal... |
| 6792109 |
Bit generator for determining a secret encryption key and corresponding process |
| Sep-14-2004 |
Bit generator for determining a secret encryption key and a corresponding process, the generator having a memory with one memorization cell and measurement and reference bits, and a calculation device... |
| 6782101 |
Encryption using fractal key |
| Aug-24-2004 |
A method for encrypting and decrypting two-dimensional data is provided using a selected fractal a square fractal key matrix size and associated fractal computation initialization values. The fractal key... |
| 6775778 |
Secure computing device having boot read only memory verification of program code |
| Aug-10-2004 |
A secure computing system stores a program, preferably the real time operating system, that is encrypted with a private key. A boot ROM on the same integrated circuit as the data processor and inaccessible... |
| 6768797 |
Method and apparatus for encrypting data in a wireless communication system |
| Jul-27-2004 |
In a communications system, a method of transforming a set of message signals representing a message comprising the steps of first encoding one of the set of message signals in accordance with a first... |
| 6765506 |
Scrambler, de-scrambler, and related method |
| Jul-20-2004 |
A scrambler includes a linear shift register having logic suitable for generating a scrambling sequence according to a predetermined generator sequence, a plurality of logic gates that allow for parallel... |
| 6760441 |
Generating a key hieararchy for use in an isolated execution environment |
| Jul-6-2004 |
The present invention is a method, apparatus, and system to generate a key hierarchy for use in an isolated execution environment of a protected platform. In order to bind secrets to particular code operating... |
| 6748539 |
System and method for securely checking in and checking out digitized content |
| Jun-8-2004 |
A system and method for permitting the rental of digitized content such as music from a kiosk includes a flash memory device that is insertable into the kiosk. The kiosk derives a content key from a media... |
| 6735697 |
Circuit arrangement for electronic data processing |
| May-11-2004 |
A description is given of a circuit arrangement for electronic data processing which includes a writeable memory for storing data to be protected against unauthorized access, a read-only memory for storing... |
| 6714649 |
Pay broadcasting system with enhanced security against illegal access to a down loaded program in a subscriber terminal |
| Mar-30-2004 |
In a pay broadcasting system, data of a broadcast program is scrambled with a scramble key updated in a short period. The scramble key is encrypted with a first key assigned to the subscriber terminal.... |
| 6714614 |
Subscriber unit for generating a stream cipher |
| Mar-30-2004 |
One embodiment of the invention is a subscriber unit for transmitting communication signals. The subscriber unit comprises a cipher stream generator which generates a cipher stream to encipher a digital... |
| 6704870 |
Digital signatures on a Smartcard |
| Mar-9-2004 |
A digital signature scheme for a "smart" card utilizes a set of prestored signing elements and combines pairs of the elements to produce a new session pair. The combination of the elements is performed... |
| 6697946 |
Message recovery signature apparatus |
| Feb-24-2004 |
A management center 520 determines a public key y.sub.A of a user A 510 using the user A's secret key x.sub.A and announces the public key y.sub.A to a user B 530. The user A 510 repeats generation of... |
| 6697488 |
Practical non-malleable public-key cryptosystem |
| Feb-24-2004 |
The present scheme improves the security of encrypted data or information by using of a practical public-key cryptosystem that is able to resist adaptive attacks. The disclosed scheme does not leak any... |
| 6687376 |
High-speed long code generation with arbitrary delay |
| Feb-3-2004 |
A circuit is designed with a first register circuit (364) arranged to store a state matrix. A memory circuit (710) is arranged to store a plurality of addressable matrices. A control circuit (700) is coupled... |
| 6684330 |
Cryptographic information and flow control |
| Jan-27-2004 |
A method of providing cryptographic information and flow control includes first determining a target domain from an IP address. An organization policy is looked up from a credential store, and an algorithm... |
| 6683954 |
Key encryption using a client-unique additional key for fraud prevention |
| Jan-27-2004 |
Encryption of a key using another key that is unique and particular to a given client is disclosed. In one embodiment, a computer-implemented method determines a first key that is unique and particular... |
| 6678379 |
Quantum key distribution method and apparatus |
| Jan-13-2004 |
A method for testing the reliability of a quantum key distribution apparatus is provided. The method includes the steps of: producing a set of quanta by the sender, the set of quanta comprising first,... |
| 6675297 |
Method and apparatus for generating and using a tamper-resistant encryption key |
| Jan-6-2004 |
The present invention increases the difficulty of reverse engineering sensitive information protected by an encryption algorithm by increasing the difficulty associated with tracing the code that generates... |
| 6654465 |
Method of implementing a key recovery system |
| Nov-25-2003 |
A method of generating a recovery key encryption key (RKEK) in a secure manner by an integrated circuit (IC) and a key recovery escrow agent includes the steps of generating by the IC a first number having... |
| 6651170 |
Integrated circuit and smart card comprising such a circuit |
| Nov-18-2003 |
An integrated circuit comprises a first processing unit and a non-volatile memory for storing a key. The first processing unit is arranged to carry out a cryptographic algorithm using the stored key. The... |
| 6631471 |
Information processing equipment |
| Oct-7-2003 |
A relation between the data process contents in an IC card chip and the consumption current of the IC card chip is reduced. Prior to executing an input data process of the IC card chip, the input data... |
| 6628786 |
Distributed state random number generator and method for utilizing same |
| Sep-30-2003 |
A system and method for generating random numbers utilizing a shared or distributed source of entropy is disclosed. In one embodiment, the invention allows networked computers to generate and share entropy... |
| 6622249 |
Data recording apparatus |
| Sep-16-2003 |
A data recording apparatus which enables an individual like an author to record in a recording medium any data, such as a publication desired to be restricted on its copying, in the way that the copying... |
| 6608901 |
Cryptographic key split combiner |
| Aug-19-2003 |
A cryptographic key split combiner, which includes a number of key split generators for generating cryptographic key splits and a key split randomizer for randomizing the cryptographic key splits to produce... |
| 6606386 |
Cryptographic key split combiner |
| Aug-12-2003 |
A cryptographic key split combiner, which includes a number of key split generators for generating cryptographic key splits and a key split randomizer for randomizing the cryptographic key splits to produce... |
| 6606387 |
Secure establishment of cryptographic keys |
| Aug-12-2003 |
A system and method are disclosed for securely establishing a cryptographic key between a first cryptographic device, for example a host cryptographic security module, and a second cryptographic device,... |
| 6603857 |
Method and apparatus for controlling release of time sensitive information |
| Aug-5-2003 |
A method and apparatus for controlling release of time-sensitive information is accomplished by a server that establishes access information for a specific future time which only becomes active once the... |
| 6587563 |
Cryptographic system using chaotic dynamics |
| Jul-1-2003 |
The invention is a cryptographic system using chaotic dynamics. A set of initial conditions is generated from the private key and becomes input to the chaotic system. The chaotic system generates a set... |
| 6578057 |
Method of and apparatus for deriving prime numbers, as well as record medium having program for executing prime number deriving method recorded thereon |
| Jun-10-2003 |
On the basis of a high degree of theory, prime numbers are derived through effective processing and steps so as to achieve a remarkable reduction in the processing time taken for the derivation. With respect... |
| 6571336 |
Method and apparatus for securing a list of passwords and personal identification numbers |
| May-27-2003 |
A method for securing passwords, personal identification numbers and identifying patterns utilizes a MasterCode camouflaged within a grid which contains all the characters, symbols or pictograms of which... |
| 6560339 |
Electronic watermarking method, digital information distribution system using such method, and storage medium storing program of such method |
| May-6-2003 |
An electronic watermarking method includes the steps of generating a plurality piece of information with different electronic watermark information, generating a plurality piece of encrypted information... |
| 6560337 |
Systems, methods and computer program products for reducing effective key length of ciphers using one-way cryptographic functions and an initial key |
| May-6-2003 |
Systems, methods and computer program products reduce effective key length of a symmetric key cipher by deriving an intermediate value from an initial key, using a one-way cryptographic function. Predetermined... |
| 6556681 |
Reconfigurable universal trainable transmitter |
| Apr-29-2003 |
A trainable transmitter comprises a transmitter, code-generation circuitry and a removable, plug-in data module. The data module includes information necessary for generating a code for a specific security... |
| 6549623 |
Cryptographic key split combiner |
| Apr-15-2003 |
A cryptographic key split combiner, which includes a number of key split generators for generating cryptographic key splits and a key split randomizer for randomizing the cryptographic key splits to produce... |
| 6549622 |
System and method for a fast hardware implementation of RC4 |
| Apr-15-2003 |
The system and method of the present invention facilitates encrypting and decrypting files using a fast hardware implementation of the RC4 method to enable secure access to information resources in a computer... |
| 6542608 |
Cryptographic key split combiner |
| Apr-1-2003 |
A cryptographic key split combiner, which includes a number of key split generators for generating cryptographic key splits and a key split randomizer for randomizing the cryptographic key splits to produce... |
| 6539094 |
Data transmission apparatus and method, data receiving apparatus and method, and data transmitting/receiving system and method |
| Mar-25-2003 |
Data to be transmitted via a serial bus in conformity with the IEEE 1394 protocol are ciphered by a ciphering/deciphering circuit, and headers are attached thereto by a header sync detecting/generating... |
| 6523117 |
System and method of online deciphering data on storage medium |
| Feb-18-2003 |
The user mounts a distributed storage medium in his or her terminal unit, selects desired information from stored information, and notifies the host central computer through a network. The host computer... |
| 6510228 |
Method and apparatus for generating encryption stream ciphers |
| Jan-21-2003 |
A method and apparatus for generating encryption stream ciphers. The recurrence relation is designed to operate over finite fields larger than GF(2). The linear feedback shift register used to implement... |
| 6504930 |
Encryption and decryption method and apparatus using a work key which is generated by executing a decryption algorithm |
| Jan-7-2003 |
In a scrambler used in the transmission side, a decryptor for generating a work key from a data key and system keys uses the same decryption algorithm as that used in a decryptor for encryption in the... |
| 6490354 |
Lightweight word-oriented technique for generating a pseudo-random sequence for use in a keystream of a stream cipher |
| Dec-3-2002 |
A word-oriented technique for generating a pseudo-random sequence, e.g., a keystream (17) for use in a stream cipher. Specifically, the technique utilizes two different arrays (653, 657) with each array... |
| 6490352 |
Cryptographic elliptic curve apparatus and method |
| Dec-3-2002 |
An apparatus for operating a cryptographic engine may include a key generation module for creating key pairs for encrypting substantive content to be shared between two users over a secured or unsecured... |
| 6473743 |
Postage meter having delayed generation of cryptographic security parameters |
| Oct-29-2002 |
A method for using cryptographic parameters in a postage meter for securing postage indicium data includes the steps of generating in the postage meter 1) first cryptographic parameters which are useable... |
| 6457127 |
Method of and device for generating a key |
| Sep-24-2002 |
A key is generated to control the access to information on an information carrier. The key is derived from an M-bit master key and an information carrier key. Apparatus to read and/or write information... |
| 6445797 |
Method and system for performing secure electronic digital streaming |
| Sep-3-2002 |
A secure electronic digital streaming system provides absolute system security and user-defined message security for electronic digital streaming between two public entities. These digital streams can... |
| 6438234 |
Quantum cryptography device and method |
| Aug-20-2002 |
A system and method for communicating a key between two stations using an interferometric system for quantum cryptography. The method includes sending at least two light pulses over a quantum channel and... |
| 6430246 |
Method and apparatus for generating a stream cipher |
| Aug-6-2002 |
A code division multiple access (CDMA) is a type of spread-spectrum communication system having a plurality of subscriber units and at least one base station. In order for a first subscriber unit to communicate... |
