| 6192473 |
System and method for mutual authentication and secure communications between a postage security device and a meter server |
| Feb-20-2001 |
A method is provided for establishing mutual authentication and secure communications between an microprocessor-based transaction evidencing device and a microprocessor-based server coupled thereto. A... |
| 6192474 |
Method for establishing a key using over-the-air communication and password protocol and password protocol |
| Feb-20-2001 |
In the password protocol, the communicating parties exchange calculation results, which each include an exponential, to generate a key. In generating the calculation results, each party adds the password... |
| 6192131 |
Enabling business transactions in computer networks |
| Feb-20-2001 |
A system for creating a log of a conversation includes a convener computer and a plurality of conversation computers interconnected by a computer network. The system includes an arbiter computer and a... |
| 6185546 |
Apparatus and method for providing secured communications |
| Feb-6-2001 |
A method of producing a hardware agent being a single integrated circuit encapsulated within a semiconductor device package. The method comprises the steps of generating a device-specific key pair internally... |
| 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... |
| 6185308 |
Key recovery system |
| Feb-6-2001 |
A key recovery information distribution device is provided between a recoverer device and a key recovery device, recovers a data key for the recoverer device, and reduces the load of the recoverer device.... |
| 6182216 |
Block cipher method |
| Jan-30-2001 |
A data encryption system for encrypting an n-bit block of input in a plurality of rounds is presented, where n is preferably 128 bits or more. The data encryption system includes a computing unit for the... |
| 6182217 |
Electronic data-processing device and system |
| Jan-30-2001 |
The electronic data-processing device has a processing unit which is connected to one or more memories via a bus. The processing unit has an encryption unit associated with it. One or more secret keys... |
| 6181803 |
Apparatus and method for securely processing biometric information to control access to a node |
| Jan-30-2001 |
A biometric device comprises a biometric processor including a data capture circuit that captures data associated with a predetermined biometric characteristic that is checked to regulate access to the... |
| 6169803 |
Encryption key processing system to be incorporated into data recovery system or key setting system for generating encryption key |
| Jan-2-2001 |
An encryption key processing system includes a user terminal system which uses a key and a sub-system for holding information regarding the user terminal system, the sub-system generating predetermined... |
| 6169802 |
Dynamic private key security system for personal messaging devices |
| Jan-2-2001 |
A dynamic private key security system for personal messaging devices (200) includes a paging terminal (112). The paging terminal (112) has a terminal cryptographic engine (111) that generates an encrypted... |
| 6169804 |
Method for verifying the expected postage security device and its status |
| Jan-2-2001 |
A secure and reliable method for verifying in the host system that the expected PSD is coupled to the host system includes generating a random number in the host system and encrypting the random number... |
| 6157720 |
Method and apparatus for encrypting data |
| Dec-5-2000 |
In the process of compressing and encrypting data, without increase of a processing time, a cipher capability is secured against the latest cryptanalysis such as differential and linear cryptanalyses.... |
| 6154541 |
Method and apparatus for a robust high-speed cryptosystem |
| Nov-28-2000 |
A cryptographic information and communication system of the knapsack type characterized by secret logical segregation of the key sets into sections by different construction methods, where different transformations... |
| 6144743 |
Information recording medium, recording apparatus, information transmission system, and decryption apparatus |
| Nov-7-2000 |
In the invention, an information recording medium records encrypted information, encrypted key information obtained by encrypting key information for decrypting the encrypted information to obtain original... |
| 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... |
| 6137885 |
Method for enabling direct encrypted communication between two terminals of a mobile radio network, and corresponding station and terminal facilities |
| Oct-24-2000 |
A method for enabling encrypted communication to be performed directly in a single hop or merely directly between two terminals of a mobile radio network by satellite and/or of the GSM/DCS type, after... |
| 6134325 |
Key transmission system |
| Oct-17-2000 |
A RSA encryption scheme includes a modulus in which at least one set of bits is of a predetermined configuration. The configuration may be selected to replicate the identity of the recipient or other information... |
| 6128387 |
Method and system for using a non-inversible transform and dynamic keys to protect firmware |
| Oct-3-2000 |
The present invention discloses a method and system to encrypt an object code using a non-inversible transform and dynamic keys in an encryption circuit and an decryption circuit. The encryption circuit... |
| 6125184 |
Method and apparatus for an adapter card providing conditional access in a communication system |
| Sep-26-2000 |
A method and apparatus for an adapter card, for use in a computer, to provide conditional access by the computer to incoming data streams while maintaining the security of information by maintaining a... |
| 6122736 |
Key agreement and transport protocol with implicit signatures |
| Sep-19-2000 |
A key establishment protocol between a pair of correspondents includes the generation by each correspondent of respective signatures. The signatures are derived from information that is private to the... |
| 6118869 |
System and method for PLD bitstream encryption |
| Sep-12-2000 |
A decryption scheme is provided for encrypted configuration bitstreams in a programmable logic device. One embodiment includes circuitry for altering a decryption key for a plurality of encrypted bitstream... |
| 6104810 |
Pseudorandom number generator with backup and restoration capability |
| Aug-15-2000 |
Pseudorandom numbers are generated in a cryptographic module in a cryptographically strong manner by combining a time-dependent value with a secret value and passing the result through a one-way hash function... |
| 6097814 |
Method and apparatus for controlling the reproduction of data stored on a storage medium method |
| Aug-1-2000 |
Plural program information and a BCA (Burst Cutting Area) number of the optical disc (100) is previously recorded in the optical disc (100). A drive ID is stored in the nonvolatile memory (104a) of the... |
| 6094572 |
Method of generating a random number from a radio signal |
| Jul-25-2000 |
A method of generating a random number is disclosed for forming an identification code used for mutual identification between a base station and a mobile telephone. The method includes receiving a radio... |
| 6088797 |
Tamper-proof electronic processing device |
| Jul-11-2000 |
A system for open electronic commerce having a customer trusted agent securely communicating with a first money module, and a merchant trusted agent securely communicating with a second money module. Both... |
| 6081598 |
Cryptographic system and method with fast decryption |
| Jun-27-2000 |
A cryptography system improves the decryption speed in the RSA algorithm by taking advantage of certain subgroups of Z.sub.n *. The cryptography system employs a new family of trapdoor permutations based... |
| 6078667 |
Generating unique and unpredictable values |
| Jun-20-2000 |
An integer for a private key is generated utilising a pair of components that are combined in a fixed predictable manner. The first component is generated from a sequencer such as a counter that generates... |
| 6064740 |
Method and apparatus for masking modulo exponentiation calculations in an integrated circuit |
| May-16-2000 |
Circuitry which performs modular mathematics to solve the equation C=M.sup.k mod n and n is performed in a manner to mask the exponent k's signature from timing or power monitoring attacks. The modular... |
| 6064738 |
Method for encrypting and decrypting data using chaotic maps |
| May-16-2000 |
The present invention features a method for encrypting and decrypting large amounts of data such as images. A simple two-dimensional map is first generalized by the introduction of parameters. The generalized... |
| 6052466 |
Encryption of data packets using a sequence of private keys generated from a public key exchange |
| Apr-18-2000 |
A first cipher stream generated from a private key negotiated as a result of a public key exchange is partitioned to form a sequence of secondary keys. The secondary keys are then indexed. In one instance,... |
| 6049611 |
One-way data conversion apparatus and device authentication system |
| Apr-11-2000 |
The verifier apparatus 50 includes a random number generation unit 51 that generates a 2n-bit random number, a separator unit 52 that separates the random number into two sets of n-bit data, a data conversion... |
| 6049612 |
File encryption method and system |
| Apr-11-2000 |
A file security system is disclosed in which both a deterministic, non-predictable, pseudo-random, symmetric encryption key and an encrypted information file are highly resistant to cryptographic analysis... |
| 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... |
| 6038320 |
Computer security key |
| Mar-14-2000 |
A computer security key provides security to a computer which includes a computer bus. The computer is programmed to function with the security key. The security key includes a connector that is adapted... |
| 6038316 |
Method and system for protection of digital information |
| Mar-14-2000 |
An information processing system including an encryption processing logic module and a decryption processing logic module for enabling the encryption of digital information to be decrypted with a decryption... |
| 6031912 |
Process and device for permitting selective access to a security system |
| Feb-29-2000 |
A process and arrangement that gives selective access to a security system, particularly in a payment system using debit cards, credit cards, or withdrawal of funds contained in a so-called smart card,... |
| 6031913 |
Apparatus and method for secure communication based on channel characteristics |
| Feb-29-2000 |
Characteristics of a communication channel are used to establish key sequences for use in encrypting communicated information. In one embodiment, these characteristics are the impedances of the channel... |
| 6028935 |
Cryptographic receiver |
| Feb-22-2000 |
A cryptographic receiver (10) includes photon detectors (52, 54, 56, 58) arranged to detect photons arriving from filters (22) and (24). A fiber coupler (14) randomly distributes each received photon (16)... |
| 6009135 |
Method and apparatus for generating a stream cipher |
| Dec-28-1999 |
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... |
| 6002770 |
Method for secure data transmission between remote stations |
| Dec-14-1999 |
A method for permitting the secure handling of data between two remote stations firstly involves the generation of an encrypted decryption key which is based on a fingerprint information signal from a... |
| 5995623 |
Information processing apparatus with a software protecting function |
| Nov-30-1999 |
The present invention provides an information processing apparatus which comprises separating means for separating inputted data into identification data and data to be encrypted, determination means for... |
| 5995533 |
Apparatus and method for generating pseudorandom quantities based upon radio channel characteristics |
| Nov-30-1999 |
Characteristics of the radio channel are used to establish pseudorandom sequences for use in communicating information. These characteristics are the short-term reciprocity and rapid spatial decorrelation... |
| 5991408 |
Identification and security using biometric measurements |
| Nov-23-1999 |
The present invention makes it possible for a user to have a security key created from one or more biometric elements of the user, such as a fingerprint. For example, a biometric feature or combination... |
| 5987139 |
Method for encryption of information |
| Nov-16-1999 |
The method involves modifying an encryption key (Kc) in accordance with a given algorithm and in dependence on the ordinal number of a time slot to obtain a modified encryption key. A modified pseudo-random... |
| 5987130 |
Simiplified secure swift cryptographic key exchange |
| Nov-16-1999 |
A first of two cryptographic units establish a cryptographic key "K" by initially selecting a first quantity "A", and computes second and third quantities "B"=.PHI..sub.1 (A) and "C"=.PHI..sub.2 (A). It... |
| 5987124 |
Method and apparatus for encrypting long blocks using a short-block encryption procedure |
| Nov-16-1999 |
A system for encrypting a plaintext block using a block encryption algorithm having a block size smaller than that of the plaintext block. The plaintext block is transformed into a masked plaintext block... |
| 5966444 |
Method and system for establishing a cryptographic key agreement using linear protocols |
| Oct-12-1999 |
A method for establishing key agreement between two communicating parties using a general linear protocol in finite and infinite dimensional spaces. Two topological linear spaces, in particular Euclidean... |
| 5966224 |
Secure communications with low-orbit spacecraft using quantum cryptography |
| Oct-12-1999 |
Apparatus and method for secure communication between an earth station and spacecraft. A laser outputs single pulses that are split into preceding bright pulses and delayed attenuated pulses, and polarized.... |
| 5960086 |
Unified end-to-end security methods and systems for operating on insecure networks |
| Sep-28-1999 |
Secure transmission of a message is achieved by using a one-time encryption key derived at the receiver and the sender from information present at both the sender and the receiver, but wherein the information... |
