| 6614909 |
Methods, systems, and circuits for generating keys for public key cryptosystems using parallel processing for modular operations of IC cards |
| Sep-2-2003 |
Modular operations are used to perform encryption/decryption of keys in a public cryptosystem. The modular operations process a first data in parallel with a second data to provide for the processing of... |
| 6614367 |
Data recording method |
| Sep-2-2003 |
A data recording apparatus reverses the bit order of each of n-bit codes assigned respectively to 2.sup.n frame data in the order of a normal-speed play, rearranges the frame data based on the reversed... |
| 6611597 |
Method and device for constructing elliptic curves |
| Aug-26-2003 |
A random number generating unit generates a random number t. An elliptic curve setting unit defines an elliptic curve E: y 2=x 3-3x+t. An elliptic curve finitude judging unit judges whether orders m1 and... |
| 6606385 |
Data encrypting/decrypting conversion methods and apparatuses and data communication system adopting the same |
| Aug-12-2003 |
Encrypting/decrypting conversion method and apparatus capable of controlling dynamically cyclic shift independent of data to undergo encrypting/decrypting conversion includes two or more different fixed... |
| 6601172 |
Transmitting revisions with digital signatures |
| Jul-29-2003 |
In a computer network, documents are produced, the document is hashed to produce a fingerprint, and the fingerprint is encrypted to sign the document then the document signature is transmitted from 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... |
| 6584568 |
Network provider loop security system and method |
| Jun-24-2003 |
The present invention involves a desktop administration system and method which allows a network administrator to remotely create, protect, and manage desktops and control file systems across a network.... |
| 6578061 |
Method and apparatus for data permutation/division and recording medium with data permutation/division program recorded thereon |
| Jun-10-2003 |
In a method for permuting and dividing 16 pieces of k-bit data held in 4k-bit long registers T.sub.0. T.sub.1, T.sub.2 and T.sub.3, k being an integer, the data of each register T.sub.i is ANDed with a... |
| 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... |
| 6571334 |
Apparatus and method for authenticating the dispatch and contents of documents |
| May-27-2003 |
Apparatus and method for authenticating that a sender has sent certain information via a dispatcher to a recipient is disclosed. The method includes the steps of: (a) providing a set A comprising a plurality... |
| 6570988 |
Simple technique for implementing a cryptographic primitive using elementary register operations |
| May-27-2003 |
A technique which implements a primitive for computing, e.g., a checksum. Specifically, this primitive replaces a mod(M) operation with a series of simple elementary register operations. These operations... |
| 6567916 |
Method and device for authentication |
| May-20-2003 |
The present invention allows even small-size verification devices to authenticate rights and qualifications without leaking authentication characteristic information to third parties. A ticket issuance... |
| 6563928 |
Strengthened public key protocol |
| May-13-2003 |
A cryptosystem utilizes the properties of discrete logs in finite groups, either in a public key message exchange or in a key exchange and generation protocol. If the group selected has subgroups of relatively... |
| 6560336 |
Apparatus for operating double vector and encrypting system including the same |
| May-6-2003 |
There is provided an apparatus for summing bivectors, e.g. double vectors (alternatively referred to as bivectors) each having a plurality of pairs of elements selected from a predetermined finite field,... |
| 6553120 |
Method for data decorrelation |
| Apr-22-2003 |
Method for the cryptography of data recorded on a medium usable by a computing unit in which the computing unit processes an input information x using a key for supplying an information F(x) encoded by... |
| 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... |
| 6546104 |
Montgomery reduction apparatus |
| Apr-8-2003 |
In a Montgomery reduction apparatus for receiving positive integers C and p and calculating D=C.multidot.R.sup.-1 mod p by using R defined as R=2.sup.n using an integer n falling within the range n.gtoreq.L... |
| 6537747 |
Data transmission using DNA oligomers |
| Mar-25-2003 |
The present invention is directed to methods for (a) encrypting information in the form of words, numbers, or graphical images, by obtaining a set of nucleic acid strands or nucleic acid analog strands... |
| 6529487 |
Method and apparatus for securely transmitting distributed RAND for use in mobile station authentication |
| Mar-4-2003 |
A method and apparatus for generating and communicating random challenge values to mobile stations is disclosed that does not lose the unpredictability of a truly random number but can be simply and economically... |
| 6526145 |
Data encryptor/decryptor using variable in-place I/O |
| Feb-25-2003 |
A computer implemented process for data encryption or data decryption using a computer is disclosed. In one embodiment, the process includes the following steps (a) reading an input dataset with a physical... |
| 6526144 |
Data protection system |
| Feb-25-2003 |
A method of communicating from a transmitter to a receiver over a communication medium. For the transmitter, the method includes the step of formatting data into a data stream to be communicated across... |
| 6523118 |
Secure cache for instruction and data protection |
| Feb-18-2003 |
A computing system, includes a processor, a cache, a memory system, and a secure cache controller system. The cache stores a plurality of cache lines. The memory system stores a plurality of blocks of... |
| 6519699 |
Method and system for voice guided secure entry of private data in a public setting |
| Feb-11-2003 |
Private user data is securely entered from a public location in a way that the private user data cannot be ascertained by observers. A voice agent generates vocal instructions for a user, instructing the... |
| 6519340 |
Method and apparatus for encryption using partial information |
| Feb-11-2003 |
A method and apparatus of encrypting optical images using binarization or phase only information is presented with a number of ways to secure the image also being provided. An image to be encrypted is... |
| 6516415 |
Device and method of maintaining a secret code within an integrated circuit package |
| Feb-4-2003 |
A device and method for safely maintaining a secret code within an integrated circuit (IC) package. The complete secret code is divided into two parts. The first part of the secret code is stored in a... |
| 6504929 |
Encryption strength evaluation support apparatus and recording medium recording encryption strength evaluation support program |
| Jan-7-2003 |
An encryption strength evaluation support apparatus includes a statistical data sampling program executing means for statistically obtaining correlations between individual bits of input and output data... |
| 6504931 |
Method and apparatus for encrypting data |
| Jan-7-2003 |
In the process of compressing and encrypting data, without an increase of processing time, a cipher capability is secured against the latest cryptanalysis such as differential and linear cryptanalyses.... |
| 6499108 |
Secure electronic mail system |
| Dec-24-2002 |
A system and method for transferring messages securely over a computer network which includes the steps of inputting the message to be transmitted at a first device and then encrypting the message at the... |
| 6499104 |
Digital signature method |
| Dec-24-2002 |
The present invention relates in particular to a method for generating a digital signature (c, d) of a message M as well as a method for authenticating such a signature having the steps of defining a modulo... |
| 6493449 |
Method and apparatus for cryptographically secure algebraic key establishment protocols based on monoids |
| Dec-10-2002 |
The present invention is a method and apparatus for providing cryptographically secure algebraic key establishment protocols that use monoids and groups possessing certain algorithmic properties. Special... |
| 6490357 |
Method and apparatus for generating encryption stream ciphers |
| Dec-3-2002 |
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... |
| 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... |
| 6487293 |
Method and apparatus for reproducing ciphered data |
| Nov-26-2002 |
A data reproducing apparatus and method is provided for reproducing data that was ciphered during recording in one or more of sector forming, header appending, error correction coding, modulation, and... |
| 6483918 |
Technique for producing a parameter, such as a checksum, through a primitive that uses elementary register operations |
| Nov-19-2002 |
A technique which implements a primitive for computing, e.g., a checksum. Specifically, this primitive replaces a mod(M) operation with a series of simple elementary register operations. These operations... |
| 6463150 |
Encryption device for information in binary code |
| Oct-8-2002 |
The invention relates to telecommunications and computer engineering, and especially to cryptographic methods and devices intended to encrypt numerical data. The inventive method comprises the steps of... |
| 6449717 |
Data copyright management system |
| Sep-10-2002 |
A data copyright management system comprises a database for storing original data, a key control center for managing crypt keys, copyright management center for managing data copyrights, and a communication... |
| 6438252 |
Method for encoding bits in a signal |
| Aug-20-2002 |
A message in the form of a sequence of bits is encoded into relatively short, non-binary signals. The message (or vector) is divided into two halves. The encoder first determines an encoding of the message... |
| 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... |
| 6438230 |
Data mapping method and apparatus with multi-party capability |
| Aug-20-2002 |
Mapping or encryption of a message made up of characters from a character set is provided. Each character in the character set is associated with one or more disjoint real number intervals. Each character... |
| 6434699 |
Encryption processor with shared memory interconnect |
| Aug-13-2002 |
An encryption chip is programmable to process a variety of secret key and public key encryption algorithms. The chip includes a pipeline of processing elements, each of which can process a round within... |
| 6424712 |
Accelerated signature verification on an elliptic curve |
| Jul-23-2002 |
A public key encryption system exchanges information between a pair of correspondents. The recipient performs computations on the received data to recover the transmitted data or verify the identity of... |
| 6415032 |
Encryption technique using stream cipher and block cipher |
| Jul-2-2002 |
A method is provided for generating a pseudo-random sequence of integers, and the method is applied to the encryption of messages. The method uses a key K and a pair of prime numbers p and q, where q=2p+1.... |
| 6411715 |
Methods and apparatus for verifying the cryptographic security of a selected private and public key pair without knowing the private key |
| Jun-25-2002 |
Methods and apparatus are disclosed for demonstrating that a public/private key pair is cryptographically strong without revealing information sufficient to compromise the private key. A key pair can be... |
| 6408331 |
Computer linking methods using encoded graphics |
| Jun-18-2002 |
A data object comprises both a graphic and embedded link information, such as the URL address of a network node, thereby permitting the graphic object to serve as a link usable by an internet browser or... |
| 6408075 |
Information processing equipment and IC card |
| Jun-18-2002 |
An IC card having a storage memory including a program storage unit for storing a program and a data storage unit for storing data and a central processing unit for executing a predetermined process in... |
| 6408074 |
Hardware architecture for a configurable cipher device |
| Jun-18-2002 |
A cipher device that can be configured to execute different types of cryptographic algorithms and perform more than one algorithm simultaneously. The device is operated from an external source and is implemented... |
| 6396926 |
Scheme for fast realization of encrytion, decryption and authentication |
| May-28-2002 |
A new scheme for fast realization of encryption, decryption and authentication which can overcome the problems of the RSA cryptosystem is disclosed. The encryption obtains a ciphertext C from a plaintext... |
| 6389442 |
Efficient finite field multiplication in normal basis |
| May-14-2002 |
The invention provides improved techniques for multiplication of signals represented in a normal basis of a finite field. An illustrative embodiment includes a first rotator which receives a first input... |
| 6389136 |
Auto-Recoverable and Auto-certifiable cryptosystems with RSA or factoring based keys |
| May-14-2002 |
A method is provided for an escrow cryptosystem that is essentially overhead-free, does not require a cryptographic tamper-proof hardware implementation (i.e., can be done in software), is publicly verifiable,... |
| 6385316 |
Method and apparatus for encrypting data in a wireless communication system |
| May-7-2002 |
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... |
