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6058187 |
Secure telecommunications data transmission
Secure data transmission apparatus comprises a data translator for translating an input string of signals, each signal having incomplete information for identifying an alphanumeric character, into...
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6058188 |
Method and apparatus for interoperable validation of key recovery information in a cryptographic system
In a cryptographic communications system, a method and apparatus for allowing a sender of encrypted data to demonstrate to a receiver its ability to correctly generate key recovery information that...
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6052787 |
Process for group-based cryptographic code management between a first computer unit and group computer units
A group-based cryptographic code management method is proposed, in which a security policy which is used in a further communication is negotiated between group computer units and a first computer...
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6052467 |
System for ensuring that the blinding of secret-key certificates is restricted, even if the issuing protocol is performed in parallel mode
A cryptographic method is disclosed that enables the issuer in a secret-key certificate issuing protocol to issue triples consisting of a secret key, a corresponding public key, and a secret-key...
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6047066 |
Communication method and device
A system (100) and method of improving activation security allows a remote device (104) to identify that there is a difference between a first signal transmitted by a central site (102) and a first...
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6044463 |
Method and system for message delivery utilizing zero knowledge interactive proof protocol
A message delivery system which can guarantee the authenticity of a user, the reliability of a message delivery, and the authenticity of the message delivery, while preventing an illegal act, and...
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6044462 |
Method and apparatus for managing key revocation
The validity status of a digital certificate is accessible even after a certificate has expired. Certificate validity status is stored and retained in a certificate status history database that...
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6041409 |
Device and method for data integrity and authentication
Various aspects of data security such as validation, authentication and encryption are accomplished by the combinations of encoding and decoding employing a mapping or inverse mapping controllable...
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6038318 |
Optimized machine computation of exponential functions and modulo functions
An optimized approach for machine computation of exponential values or functions is disclosed. The determination of the exponential values is performed using a "Big Multiply" approach and a "Big...
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6035406 |
Plurality-factor security system
The invention provides a method and system for simultaneously authenticating a user using two or more factors, such as both a password and a physical token or both a password and biometric...
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6035041 |
Optimal-resilience, proactive, public-key cryptographic system and method
Proactive robust threshold schemes are presented for general "homomorphic-type" public key systems, as well as optimized systems for the RSA function. Proactive security employs dynamic memory...
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6026167 |
Method and apparatus for sending secure datagram multicasts
A method and apparatus for generating additional implicit keys from a key [K ij ] N without the necessity of generating a new Diffie-Helman (DH) certificate or requiring communication between...
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6026293 |
System for preventing electronic memory tampering
Methods and apparatus for preventing tampering with memory in an electronic device, such as a cellular telephone, are disclosed. An electronic device having a memory and a processing means contains...
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6026163 |
Distributed split-key cryptosystem and applications
A distributed split-key cryptosystem and application in a public-key setting wherein each of a plurality of trustees independently selects his own secret-public key pair. The trustees combine their...
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6023689 |
Method for secure communication in a telecommunications system
A method for sending a secure message in a telecommunications system utilizing public encryption keys. All authentication parameters of each of the users, including each user's decryption key that...
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6021197 |
Method and apparatus for controlling the operation of a signal decoder in a broadcasting system
In a method and apparatus for controlling the operation of a signal decoder in a broadcasting system, a broadcast signal and an encrypted signature are generated and the signature is added to the...
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6021200 |
System for the anonymous counting of information items for statistical purposes, especially in respect of operations in electronic voting or in periodic surveys of consumption
The system includes a plurality of decision units, at least one verification unit, and at least one counting unit, the units being functionally and structurally separate from each other. Each...
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6009177 |
Enhanced cryptographic system and method with key escrow feature
The invention provides a cryptographic system and method with a key escrow feature that uses a method for verifiably splitting users' private encryption keys into components and for sending those...
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6009173 |
Encryption and decryption method and apparatus
A method for efficient encryption and decryption (100) comprises the steps of encrypting a message (104) at a sending unit which is to be sent to a receiving unit using a message key (106) and...
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6005939 |
Method and apparatus for storing an internet user's identity and access rights to world wide web resources
A method and apparatus for obtaining user information to conduct secure transactions on the Internet without having to re-enter the information multiple times is described. The method and apparatus...
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6005943 |
Electronic identifiers for network terminal devices
The generation of electronic identifiers for network interface units connected to a data network for use in detecting unauthorized decryption of encrypted data transmitted over the data network. A...
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6002771 |
Method and system for regulating discounts on merchandise distributed through networked computer systems
The present invention provides a method and system for regulating discounts on merchandise distributed through networked computer systems. The method and system involve the use of discount coupons...
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6002768 |
Distributed registration and key distribution system and method
An online conference session management system includes computer sites associated with a conference session holder, a plurality of service providers and a plurality of conference session...
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5999628 |
Method and apparatus for improved digital message transaction model
The invention is a machine-readable medium for implementing an improved electronic transaction model. The machine-readable medium stores at least one non-certficate data block, at least one prior...
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5999627 |
Method for exponentiation in a public-key cryptosystem
The present invention relates to an improved method for performing modular exponentiation to a fixed base element. The method includes exponentiating a first digital input signal g by a second...
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5995624 |
Bilateral authentication and information encryption token system and method
An authentication and information encryption system and method which uses a token system for increased security in accommodating bilateral encrypted communications between an originating system and...
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5991415 |
Method and apparatus for protecting public key schemes from timing and fault attacks
Improved methods and apparatus are provided for protecting public key schemes based on modular exponentiation (including RSA and Diffie-Hellman) from indirect cryptanalytic techniques such as...
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5991399 |
Method for securely distributing a conditional use private key to a trusted entity on a remote system
Secure distribution of a private key to a user's application program (also called a "trusted player" such as a DVD player or CD-ROM player) with conditional access based on verification of the...
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5987138 |
Identification and/or signature process
According to the invention, the secret key of the claimant is constituted by k numbers s 1 , s 2 , . . . , s k with a low public exponent. The verifier draws k numbers a 1 , a 2 , . . . , a k in...
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5987133 |
Electronic authentication system
As a public key, a character string which can be easily reasoned by a person, e.g., a character string obtained by adding a specific character string, e.g., "?", of which code is an odd number to...
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5987130 |
Simiplified secure swift cryptographic key exchange
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"=Φ 1 (A) and "C"=Φ 2 (A). It must...
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5987134 |
Device and method for authenticating user's access rights to resources
The present invention provides a device for authenticating user's access rights to resources, which comprises first memory means for storing challenging data, second memory means for storing unique...
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5987131 |
Cryptographic key exchange using pre-computation
A public-key method of cryptographic key exchange using modular exponentiation in which memory, for storing pre-computed results, can be flexibly traded off against the computational complexity of...
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5982899 |
Method for verifying the configuration the computer system
A method for verification of configuration data which is expressive of the configuration of a computer system. A computer system having configuration data stored therein, further includes an...
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5982900 |
Circuit and system for modulo exponentiation arithmetic and arithmetic method of performing modulo exponentiation arithmetic
In order to avoid large-scale arithmetic circuit and a complicated processing procedure in performing modular arithmetic such as a modular arithmetic exponentiation and modular multiplication in...
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5978485 |
Foreign exchange transaction system
A realtime multilateral foreign exchange settlement system having a computer implemented netting system, a processor-based multilateral settlement coordinator (MSC) having a first money module and...
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5974151 |
Public key cryptographic system having differential security levels
A method of encoded communication in which a receiver generates a receiver public key by looking up a monitoring authority public key, multiplying four prime numbers, and encoding the identities of...
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5970147 |
System and method for configuring and registering a cryptographic device
A system and method for configuring and registering a cryptographic device. The configuration phase involves loading a device serial number (DSER) and a symmetric key (SK) into non-volatile memory...
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5966446 |
Time-bracketing infrastructure implementation
Implemented preferably within a digital camera, an electronic device is used to prevent a captured data clip from being fraudulently altered without detection. The electronic device performs...
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5966445 |
Identification scheme single or multi-digital signature scheme giving message recovery single or multi-digital signature scheme with appendix key exchange scheme and blind digital signature scheme
An identification scheme which allows a prover to identify his own identity to a verifier more certainly and prevents already used authentication information from being re-used, a key exchange...
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5963649 |
Message authorization system for authorizing message for electronic document
A message authorization system in which a sender sub-system and a verifier sub-system each have inherent secret information and inherent public information set corresponding to the secret...
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5963644 |
Process and device for making secure a telephone link connecting two subscriber sets
A telephone link comprises two network terminals to which two subscriber sets are respectively connected, two subscriber lines respectively linking the two network terminals to two line terminals...
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5960087 |
Distributed garbage collection system and method
A distributed garbage collection system and method is disclosed that is compatible with local ref-count or full garbage collection and that ensures that no local object's storage is deleted by the...
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5960085 |
Security badge for automated access control and secure data gathering
A system utilizing a personal identification badge to collect data and to provide access to a computer terminal. The personal identification badge includes circuitry and transceiver components for...
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5956407 |
Public key cryptographic system having nested security levels
A method of encrypted communication including creating a message and looking up a public key of a recipient. Then, encoding the message via a first encoding process using a first portion of the...
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5956403 |
System and method for access field verification
A system and method for key escrow cryptography for use in a system comprising a sender and a receiver. Only public escrow keys are stored in the sender and the receiver. The sender encrypts a...
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5956406 |
Method of setting up secure communications and associated encryption/decryption system
A method of establishing secure communication between users by means of a public key encryption/decryption system comprises the following steps: a center generates a pair of keys comprising a...
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5956404 |
Digital signature with auditing bits
A method for digitally signing a message by a tamper-resistant device to generate a digital signature. The method includes the step of hashing the message to form message bits; and encrypting with...
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5956400 |
Partitioned information storage systems with controlled retrieval
An information storage system includes one or more information update terminals, a mapper, one or more partial-databases, and one or more query terminals, exchanging messages over a set of...
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5953420 |
Method and apparatus for establishing an authenticated shared secret value between a pair of users
A method and apparatus for generating authenticated Diffie-Hellman keys. Each user first generates an authenticated first shared secret value from a first nonshared persistent secret value...
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