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5850450 |
Method and apparatus for encryption key creation
A portable electronic data module for secure transactions, the electronic data module having a random number generator and an optimized co-processor for producing unbreakable key sets for a two-key...
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5850444 |
Method and apparatus for encrypting radio traffic in a telecommunications network
A generic communications network provides an encrypted communications interface between service networks and their subscribers. When communications are initiated between a subscribing...
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5850443 |
Key management system for mixed-trust environments
The invention allows for transporting, in different degrees of security strength, a symmetric key encrypted using an asymmetric encryption technique, and along with this transporting ciphertext...
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5850442 |
Secure world wide electronic commerce over an open network
A network of users and servers of a type found in the Internet system is extended to permit secure electronic commercial transactions to be accomplished. The network is extended to include a public...
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5841970 |
Authentication method for networks
An authentication method for use by application servers on networks to authenticate users of the applications is provided. In the method, an application server receives authentication data from the...
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5838792 |
Computer system for centralized session key distribution, privacy enhanced messaging and information distribution using a split private key public cryptosystem
An article of manufacture for effecting secure communications during a communications session between users in a secured communication cryptosystem in which users are each associated with a public...
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5835592 |
Secure, swift cryptographic key exchange
Using the present cryptographic key exchange protocol, a first of two cryptographic units selects quantities "A" and "B." That same unit then applies a mathematical function "Φ 1 " to A and B to...
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5835598 |
Public key method of encoding data
A computerized public key process for encoding data makes it possible to achieve an even greater data privacy than known public key processes. The process achieves this by the fact that the public...
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5835597 |
Software-efficient pseudorandom function and the use thereof for decryption
A software-efficient pseudorandom function maps an index and an encryption key to a pseudorandom bit string useful for constructing a stream cipher. The method begins by preprocessing the...
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5835595 |
Method and apparatus for crytographically protecting data
A method and apparatus for transferring encrypted information to a database. First certification information is transferred from a first database to a second database. Second certification...
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5832091 |
Fingerprint controlled public key cryptographic system
A public key cryptographic system is implemented as follows. In an enrolment apparatus, the unique number for use in generating the public key and private key of the system is generated by...
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5832089 |
Off-line compatible electronic cash method and system
An off-line electronic cash system having an electronic coin, a bank B, a payee S, and a user U with an account at the bank B as well as a user password z u ,i, has a method for performing an...
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5828893 |
System and method of communicating between trusted and untrusted computer systems
A computer network comprising a trusted computer network (16), and an untrusted computer network (17). A plurality of firewall systems (21) provide controlled access between the trusted computer...
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5825300 |
Method of protected distribution of keying and certificate material
A computer system and a method for the protected distribution of certificate and keying material between a certification authority and at least one entity in the certification authority's domain,...
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5825884 |
Method and apparatus for operating a transactional server in a proprietary database environment
A transactional server system for transferring subscriber information requests to information service providers, and methods of operating the same result in discouraging reconstruction of the...
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5825876 |
Time based availability to content of a storage medium
A service methodology for time based availability to content, such as, movies, music, games, information and the like, provisioned on a storage medium whereby revenue may be generated for premier...
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5818937 |
Telephone tone security device
An encryption device. A user wishes to identify himself to a remote party, over a telephone line. The remote party provides a Transaction Number, TN, to the user. The TN is given to the encryption...
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5815573 |
Cryptographic key recovery system
A cryptographic key recovery system for generating a cryptographic key for use by a pair of communicating parties while simultaneously providing for its recovery using one or more key recover...
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5812664 |
Key distribution system
This invention is a system for producing and distributing new decryption keys to verifiers. Verifier decryption key updates are printed in a secure manner on paper or postcards and mailed to the...
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5812670 |
Traceable anonymous transactions
Encryption is a common tool to achieve privacy of communication in networks whose lines are not physically protected. In most communication networks, however, having a sender S send an encrypted...
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5812669 |
Method and system for providing secure EDI over an open network
A method and system for selectively interconnecting a plurality of computers (112,114) over an open public network (120,102,122), such as the INTERNET, provides a private secure computer exchange...
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5809144 |
Method and apparatus for purchasing and delivering digital goods over a network
A method for purchasing and delivering goods over a network is comprised of the steps of identifying a digital good to be purchased. A purchase price for the digital good is negotiated. After the...
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5799088 |
Non-deterministic public key encrypton system
A non-deterministic public key encryption system whereby a public key is generated from a private key using mathematical operations equivalent to exponentiation in finite fields. Thus an attacker...
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5796833 |
Public key sterilization
A public key sterilization scheme for thwarting possible attacks based on choosing malicious public keys. A first user sends public key information to a certificate authority. The certificate...
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5793659 |
Method of modular reduction and modular reduction circuit
A method of modular reduction P mod Q based on a precomputation. Two quantities are precomputed and stored in a look-up table. Based on these stored precomputed quantities, two stages of partial...
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5790669 |
Lightweight non-repudiation system and method
A system and method is disclosed that provides lightweight non-repudiability for networked computer systems. Each party to a two-party communication maintains hashes on its incoming and outgoing...
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5790675 |
Cryptographic communication process
A novel asymmetrical cryptographic schema which can be used for enciphering, signature and authentication. The schema is based on low degree public polynomial equations with value in a finite ring...
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5790667 |
Personal authentication method
A user i calculates authentication application information involving a random-number parameter and transmits it to a sales company A. At the sales company A, the received authentication application...
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5787172 |
Apparatus and method for establishing a cryptographic link between elements of a system
A secure cryptographic network is established among operational units in a system. A public key cryptosystem is initially used to establish secure communication links. Then, each secure...
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5787178 |
Computerized method for signing a message
A computerized method for signing a message, where a secret key is used for signing and the signature can be tested with the help of a public key, provides for the public key to be a number n that...
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5787169 |
Method and apparatus for controlling access to encrypted data files in a computer system
In a system in which encrypted information can be protected and maintained by multiple users using passwords in concert, a file with secure data contains both an unencrypted header and an encrypted...
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5784463 |
Token distribution, registration, and dynamic configuration of user entitlement for an application level security system and method
A shared secret key distribution system which enables secure on-line registration for services provided by an application server through an application level security system or firewall utilizes an...
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5781633 |
Capability security for transparent distributed object systems
A system providing capability security for distributed object systems is disclosed. The basic tenet of capability security is that the right to do something to an object (e.g., invoke a particular...
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5778072 |
System and method to transparently integrate private key operations from a smart card with host-based encryption services
A system and method provide transparent integration of a smart card private key operations with an existing set of encryption services and system applications. A key store manager manages user key...
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5778069 |
Non-biased pseudo random number generator
A computer-implemented pseudo random number generator includes an input device to assemble multiple classes of bits from multiple sources into an input bit string. The multiple classes of bits...
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5778067 |
Value transfer system
A value transfer system which allows value to be transferred between electronic purses comprises computer which controls the loading of purses with value and the redemption of value from purses, a...
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5768379 |
System for the checking of limited access to authorized time slots renewable by means of a portable storage device
The invention relates to systems for checking access limited to authorized time slots renewable by means of a portable storage device. The system comprises, for this purpose, an element (LE)...
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5768385 |
Untraceable electronic cash
An electronic cash protocol including the steps of using a one-way function f 1 (x) to generate an image f 1 (x 1 ) from a preimage x 1 ; sending the image f 1 (x 1 ) in an unblinded form to a...
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5768389 |
Method and system for generation and management of secret key of public key cryptosystem
A method and a system for generating and managing a secret key of a public key cryptosystem, in which the secret key is generated inside a tamper resistant device, and stored into a storage region...
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5768388 |
Time delayed key escrow
Methods for designing encryption algorithms with different levels of security for different parties: "easier" (but requiring some work nonetheless) to break for some parties (e.g., the government)...
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5764772 |
Differential work factor cryptography method and system
Differential work factor cryptographic method, system, and data structure for reducing but not eliminating the work factor required by an authority to break an encrypted message encrypted with a...
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5764767 |
System for reconstruction of a secret shared by a plurality of participants
A method for reconstructing a secret, over a public communication channel, using a perfect t-out-of-n secret sharing scheme. The scheme having a dealer which utilizes a delivering procedure for...
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5764768 |
Blind encryption
A method of processing encrypted communications sent by a first party, the method including the steps of: receiving from the first party a message that has a first part, a second part, a third part...
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5761307 |
Method for securing data in a telecommunications system
A subscriber network is operated bidirectionally and has one or more coaxial line tree networks which are shared in each case by a plurality of subscriber-end network termination units and extend...
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5761310 |
Communication system for messages enciphered according to an RSA-type procedure
The procedure involves key numbers "d" and "e" and a modulus N, so hat "N" is the product of two factors "p" and "q" which are prime numbers N=p.q, and e.d=1 MOD φ(N), where φ(N) is the Euler...
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5757918 |
Method and apparatus for user and security device authentication
A new process is described for verifying a user and/or authenticating a smart card in an off-line computer environment with limited a priori knowledge on the part of the verifier. This process...
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5754659 |
Generation of cryptographic signatures using hash keys
A method and apparatus are provided for generating a digital signature that authenticates information of a plurality of different information groups. Information from each group is hashed to...
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5751808 |
Multi-purpose high speed cryptographically secure sequence generator based on zeta-one-way functions
A method is disclosed whereby a high performance, high integrity, cryptographically secure sequence generator based on zeta one-way functions is specified for pseudorandom sequence generation,...
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5748735 |
Securing E-mail communications and encrypted file storage using yaksha split private key asymmetric cryptography
A method is provided for securing stored files in a system having a plurality of system users with each system user having an associated asymmetric crypto-key with a public key portion and a...
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5748782 |
Device for implementing a message signature system and chip card comprising such a device
This provides a first device for implementing an RSA-type protected data exchange system for the signing of messages and the verification of the signed messages, and a second device for inhibiting...
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