| 7043016 |
Substitution-box for symmetric-key ciphers |
| May-9-2006 |
An input data block is cryptographically converted into an output data block; by performing a non-linear operation on the input data block using an S-box based on permutations. The S-box is associated... |
| 7035408 |
Method to generate pseudo-random sequence of multi-carrier data symbols, and related transmitter and receiver |
| Apr-25-2006 |
To generate a pseudo-random sequence (PRMS1) of multi-carrier data symbols (DMT0, DMT1, DMT2), a pseudo-random bit sequence (PRBS1) is produced by repetitively generating... |
| 7023990 |
Secure parameter generating device and parameter generating method in algebraic curve crytography |
| Apr-4-2006 |
The Stickelberger element computing device computes a Stickelberger element ω in an ab cyclotomic; the Jacobian addition candidate value computing device computes the Jacobian addition candidate... |
| 7020287 |
Method and system for key insertion for stored encrypted content |
| Mar-28-2006 |
An encrypted content transport stream is received by a viewer's device and recorded for subsequent playback. During recording, keys in headers of packets of the stream are stripped and placed in sequence... |
| 7016494 |
Multiple cryptographic key precompute and store |
| Mar-21-2006 |
A method and apparatus provides cryptographic parameters for use in cryptographic applications in response to requests therefor. The method includes the steps of: pre-computing one or more different types... |
| 7003109 |
Compact crypto-engine for random number and stream cipher generation |
| Feb-21-2006 |
A compact dual function Random Number Generator and Stream Cipher Generator includes a Crypto-engine has a controller for controlling the engine to operate in one or other of its functions. The Crypto-engine... |
| 7000111 |
Method for masking secret multiplicands |
| Feb-14-2006 |
A mobile terminal for use in a mobile communications system includes a SIM card storing subscriber related data. For security, the SIM card performs secret cryptographic calculations with secret numbers.... |
| 6990200 |
Encryption method, cryptographic communication method, ciphertext generating device and cryptographic communication system of public-key cryptosystem |
| Jan-24-2006 |
Two public keys including a random number term therein are prepared in a database for each divided plaintext in advance, a plaintext is divided into a plurality of 1-bit divided plaintexts, one public... |
| 6961426 |
Cascaded stream cipher |
| Nov-1-2005 |
A pseudo-random number generating circuit and method, comprising: a plurality of pseudo-random number generator (PRNG) units combined in a cascade structure of several layers to produce a pseudo-random... |
| 6961427 |
Methods and apparatus for keystream generation |
| Nov-1-2005 |
Methods and apparatus for the generation of a cryptographic one way function (a key or keystream generator) for use in encrypting or decrypting binary data. A non-linear key or keystream generation algorithm... |
| 6947558 |
Stream cipher having a shuffle network combiner function |
| Sep-20-2005 |
A stream cipher is provided with one or more data bit generators to generate a first, second and third set of data bits. The stream cipher is further provided with a combiner function having a network... |
| 6934388 |
Method and apparatus for generating random permutations |
| Aug-23-2005 |
An apparatus (10) for generating a sequence of blocks of randomly permuted multi-bit data elements includes an input register (12) that produces a repeating block of distinct input data elements... |
| 6922785 |
Apparatus and a method for secure communications for network computers |
| Jul-26-2005 |
Encryption hardware built on a network interface card is provided by the present invention for encrypting data sent from a computer to a network. A block of data is retrieved from the network interface... |
| 6901145 |
Generation of repeatable cryptographic key based on varying parameters |
| May-31-2005 |
A repeatable cryptographic key is generated based on varying parameters which represent physical measurements. Locations within a share table, which locations store valid and invalid cryptographic shares,... |
| 6895090 |
Pseudo-noise sequence with insertion having variant length and position |
| May-17-2005 |
An augmented pseudo-noise sequence (10) is generated from a two or more pseudo-noise sequences, using LFSRs or other such devices. A segment (16) of a one pseudo-noise sequence (14), having an arbitrary... |
| 6885747 |
Cryptographic key split combiner |
| Apr-26-2005 |
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... |
| 6862354 |
Stream cipher encryption method and apparatus that can efficiently seek to arbitrary locations in a key stream |
| Mar-1-2005 |
A stream cipher encryption method and apparatus that can efficiently seek to arbitrary location in a keystream, and a method of generating an arbitrary segment of keystream. |
| 6831980 |
Random number generator and method for same |
| Dec-14-2004 |
A method and system for generating random numbers is disclosed wherein an array of imaging sensors while not in normal use, captures ambient light and back scattered light. These light sources vary naturally... |
| 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... |
| 6772339 |
Mix and match: a new approach to secure multiparty computation |
| Aug-3-2004 |
A method for secure multiparty computation is disclosed. In one embodiment, participants to a secure computation agree upon a function to be computed and a representation of the function as a circuit with... |
| 6760439 |
Device for implementing a block-ciphering process |
| Jul-6-2004 |
The invention relates to a device for implementing a block-ciphering process using an encryption/decryption arithmetic-logic module (3) which is supplied with the data stream of word length j.ltoreq.n... |
| 6754345 |
Pseudorandom number generation circuit and data communication system employing the same |
| Jun-22-2004 |
A pseudorandom number generation circuit 2 whose generation timings of pseudorandom numbers vary randomly is disclosed. The pseudorandom number generation circuit 2 includes a clock generation circuit... |
| 6748083 |
Method and apparatus for free-space quantum key distribution in daylight |
| Jun-8-2004 |
A quantum cryptography apparatus securely generates a key to be used for secure transmission between a sender and a receiver connected by an atmospheric transmission link. A first laser outputs a timing... |
| 6691921 |
Information processing device |
| Feb-17-2004 |
An object of the present invention is to prevent secret information that is being internally processed from being inferred through operational information of a secured device, including the current consumption... |
| 6643374 |
Duty cycle corrector for a random number generator |
| Nov-4-2003 |
A method and apparatus for producing a corrected bit stream from a random bit stream output by a random bit source. Sequential pairs of bits in the random bit stream are compared. If both bits in a pair... |
| 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... |
| 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,... |
| 6590981 |
System and method for secure cryptographic communications |
| Jul-8-2003 |
An apparatus and method for secure cryptographic communications between a sender and a receiver or multiple receivers that includes first and second timing elements, and first and second key storage units... |
| 6560338 |
Limiting delays associated with the generation of encryption stream ciphers |
| May-6-2003 |
A method and an apparatus for generating encryption stream ciphers are based on a recurrence relation designed to operate over finite fields larger than GF(2). A non-linear output can be obtained by using... |
| 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... |
| 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... |
| 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... |
| 6477251 |
Apparatus and method for securely determining an outcome from multiple random event generators |
| Nov-5-2002 |
An apparatus includes a first processor, a second processor and a communications path therebetween. The first processor has a random event generator for generating the first event of a multiple-part event... |
| 6414957 |
Parallel processor for use in distributed sample scrambler |
| Jul-2-2002 |
A parallel processor of a distributed sample scrambler of cell-based physical layer of ISDN(Integrated Service Digital Network) used in a 16-bit mode of utopia interface is disclosed. The parallel processor... |
| 6327661 |
Using unpredictable information to minimize leakage from smartcards and other cryptosystems |
| Dec-4-2001 |
Methods and apparatuses are disclosed for securing cryptosystems against external monitoring attacks by reducing the amount (and signal to noise ratio) of useful information leaked during processing. This... |
| 6317833 |
Practical mix-based election scheme |
| Nov-13-2001 |
In an improved election process, a voter constructs his or her vote message (potentially padded with a random string) and encrypts it. The voter then signs the encrypted vote and posts the signed, encrypted,... |
| 6301361 |
Encoding and decoding information using randomization with an alphabet of high dimensionality |
| Oct-9-2001 |
A method for encoding a set of initial symbols from a plurality of elemental symbols. The method generates for each symbol from the set of initial symbols, a first parameter representing a number of intervals... |
| 6285761 |
Method for generating pseudo-random numbers |
| Sep-4-2001 |
The present invention is a method for outputting larger bit size pseudo-random number z.sub.i that is cryptographically secure. Since larger bit size pseudo-random numbers are being outputted, larger bit... |
| 6278780 |
Method of and an apparatus for generating internal crypto-keys |
| Aug-21-2001 |
To provide a method of generating internal crypto-keys to be set initially in a feedback-shift-registers of a pseudo-random-sequence generator of a stream cipher system with sufficient security and sufficiently... |
| 6275586 |
Cryptographically secure pseudo random number generator |
| Aug-14-2001 |
A cryptographically secure random number generating system includes a random number generator for generating random numbers, an encryption engine, and a modulus offset unit. The random number generator... |
| 6185307 |
Cryptography security for remote dispenser transactions |
| Feb-6-2001 |
The invention relates to providing secure transactions with a tag and POS device associated with a host network authorization system. In doing so, the tag is adapted to bi-directionally communicate with... |
| 6163612 |
Coding device, decoding device and IC circuit |
| Dec-19-2000 |
A coding device, a decoding device, and an IC card capable of establishing highly reliable security are disclosed. A random number determining section 11, using a random number generating procedure selected... |
| 6144744 |
Method and apparatus for the secure transfer of objects between cryptographic processors |
| Nov-7-2000 |
Objects such as master keys or object protection keys that are kept in a protected environment of a crypto module are securely transferred between modules by means of transport keys. The transport keys... |
| 6141422 |
Secure cryptographic multi-exponentiation method and coprocessor subsystem |
| Oct-31-2000 |
A system for performing high speed exponentiation in a secure environment. The system includes an interface for receiving encrypted data sent from a host system, a plurality of exponentiators capable of... |
| 6108422 |
Conditional access system, downloading of cryptographic information |
| Aug-22-2000 |
An access control processor for a conditional access system. The processor includes a decryptor in an information receiver for decrypting encrypted information segments received by the information receiver... |
| 6081601 |
Method of implementing connection security in a wireless network |
| Jun-27-2000 |
The invention relates to a method of providing connection security for a connection between terminals in a wireless network. In the method data is transmitted from a first terminal (MS1) via nodes in the... |
| 6049613 |
Method and apparatus for encrypting, decrypting, and providing privacy for data values |
| Apr-11-2000 |
A mix network with superior privacy and robustness is provided. An apparatus comprising a duplicator and first and second operation modules is disclosed. The first and second operation modules are each... |
| 6047068 |
Method for determining an encryption key associated with an integrated circuit |
| Apr-4-2000 |
A method and an apparatus for determining an encryption key associated with an integrated circuit having a memory plane that includes a matrix of electric contacts on it's surface and a layer of inhomogeneous... |
