| 6170058 |
Method and apparatus for cryptographically camouflaged cryptographic key storage, certification and use |
| Jan-2-2001 |
A digital wallet stores an cryptographically camouflaged access-controlled datum, e.g., a private key encrypted under the user's PIN. Entry of the correct PIN will correctly decrypt the stored key. Entry... |
| 6167521 |
Securely downloading and executing code from mutually suspicious authorities |
| Dec-26-2000 |
An apparatus, system and method for secure code-downloading and information exchange, in the full generality of complex code dependencies while considering the implications of mutual distrust and hot-swapping.... |
| 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... |
| 6128391 |
Method and apparatus for asymetric key management in a cryptographic system |
| Oct-3-2000 |
A method and apparatus for asymmetrical key management in a cryptographic system is provided. Embodiments of the invention implement varying levels of diversification to manage the encryption keys. In... |
| 6125185 |
System and method for encryption key generation |
| Sep-26-2000 |
A method to balance or level processor computational load during the generation of random symmetric DES type keys and RSA type public key encryption, whereby the DES type keys are pre-generated and pre-encrypted... |
| 6078888 |
Cryptography security for remote dispenser transactions |
| Jun-20-2000 |
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... |
| 6076078 |
Anonymous certified delivery |
| Jun-13-2000 |
A number of fault-tolerant methods for purchasing digital goods with a digital token over a network in which the token's value resides either with a customer or a merchant are disclosed. One version of... |
| 6073237 |
Tamper resistant method and apparatus |
| Jun-6-2000 |
A method for securing data in a tamper resistant fashion on a computer connected to a network. The presence of a user on a network is established using one protocol with routine operations conducted by... |
| 6026163 |
Distributed split-key cryptosystem and applications |
| Feb-15-2000 |
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 public... |
| 6023689 |
Method for secure communication in a telecommunications system |
| Feb-8-2000 |
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 is known... |
| 5999629 |
Data encryption security module |
| Dec-7-1999 |
We have recognized that there is a strong need to control and maintain the secrecy of the intelligence that may be used by computers to communicate with another, for example, by encrypting the messages... |
| 5991399 |
Method for securely distributing a conditional use private key to a trusted entity on a remote system |
| Nov-23-1999 |
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 trusted... |
| 5982892 |
System and method for remote authorization for unlocking electronic data |
| Nov-9-1999 |
A system and method for controlling unauthorized access to software distributed to a user by a vendor in which a verification key is generated by a product key generator and either embedded in the software... |
| 5915021 |
Method for secure communications in a telecommunications system |
| Jun-22-1999 |
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 is known... |
| 5892824 |
Signature capture/verification systems and methods |
| Apr-6-1999 |
A signature device for capture or capture and verification includes a variety of advantageous features including, for example, an ability to work in conjunction with an IC card; an improved angle correction... |
| 5889860 |
Encryption system with transaction coded decryption key |
| Mar-30-1999 |
The encryption secured computer system (10) includes a server (12) that communicates with clients (14-20) across a public network (21) using a novel transaction coded decryption key technology that discourages... |
| 5857023 |
Space efficient method of redeeming electronic payments |
| Jan-5-1999 |
A method of redeeming for a seller electronic payments generated by and received from a customer using a master key unknown to the seller. In anticipation of making electronic payments, a customer sends... |
| 5778067 |
Value transfer system |
| Jul-7-1998 |
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 special... |
| 5761306 |
Key replacement in a public key cryptosystem |
| Jun-2-1998 |
Improved key management is provided by a public key replacement apparatus and method for operating over insecure networks. An active public key and the mask of a replacement public key are provided by... |
| 5745576 |
Method and apparatus for initialization of cryptographic terminal |
| Apr-28-1998 |
The present invention provides a method and apparatus for initializing cryptographic terminals in a cryptographic system. The invention provides a base key that is common to all controllers produced by... |
| 5729609 |
Method for producing a common key in two devices, in order to implement a common cryptographic procedure, and associated apparatus |
| Mar-17-1998 |
The invention relates to a method and an apparatus for producing a key that is common to two devices that belong to different sets and are intended to implement a common cryptographic procedure. Each device... |
| 5706347 |
Method and system for authenticating a computer network node |
| Jan-6-1998 |
A method and system for verifying the identity of a computer network node is provided. As part of the session initiation process between two partner nodes planning to exchange sensitive encrypted data,... |
| 5703949 |
Method for establishing secure communications among processing devices |
| Dec-30-1997 |
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... |
| 5694471 |
Counterfeit-proof identification card |
| Dec-2-1997 |
A system and method for preventing counterfeiting of an identification or transaction card, and for verifying that the user of the card is an authorized user, involves the use of a unique, unalterable... |
| 5682428 |
Personal access management system |
| Oct-28-1997 |
A multi-component system for linking a user to a product or service provider includes a user processing device, a storage device, and a provider device. The storage device stores provider-specific application... |
| 5680456 |
Method of manufacturing generic meters in a key management system |
| Oct-21-1997 |
A method of manufacturing transaction evidencing devices, such as digital postage meters, includes the steps of generating a master key in a logical security domain of a Key Management System; installing... |
| 5534857 |
Method and system for secure, decentralized personalization of smart cards |
| Jul-9-1996 |
A method and apparatus for securely writing confidential data from an issuerer to a customer smart card at a remote location includes, establishing a communication link between a retailer data terminal... |
| 5446796 |
Method and apparatus for settlement of accounts by IC cards |
| Aug-29-1995 |
An IC card has a card information memory area wherein there are written a master public key nA, card secret keys pU and qU, a card public key nU, a card identification number IDU, and a first master digital... |
| 5428684 |
Electronic cashless transaction system |
| Jun-27-1995 |
A key control method is for use in an electronic cashless transaction system including at least a bank center, a store transaction terminal and an IC card being used as an electronic cashless transaction... |
| 5381478 |
Cipher communication system for transaction data |
| Jan-10-1995 |
A cipher communication system for communicating transaction data between a host computer and a portable electronic device, wherein the host computer includes a first memory for storing a master key data,... |
| 5351296 |
Financial transmission system |
| Sep-27-1994 |
A method and device for determining and securely transmitting an account code of a financial card over a communications link in a communications network to a remote location which also allows a telephone... |
| 5228084 |
Security apparatus and system for retail environments |
| Jul-13-1993 |
A gasoline service station includes gasoline dispensers and a PIN pad including keypads for receiving personal identification numbers and assembled into a network for securely communicating personal identification... |
| 5175766 |
Signalling scheme for controlling data encryption device in an electronic fund transaction processing system |
| Dec-29-1992 |
An improved method for communicating with a data encryption device is described. In accordance with this invention, a data encryption device adapted for providing encryption functions such as data encryption... |
| 5014312 |
Security system for the protection of programming zones of a chip card |
| May-7-1991 |
The use of chip cards, with the level of security of the type associated with chip cards of the type used by banks, is extended to move widespread use by organizing a secure dispatch of blank chip cards... |
| 4985920 |
Integrated circuit card |
| Jan-15-1991 |
An integrated circuit (IC) card is provided with an external memory having a much larger memory capacity than that of a usual internal memory packaged inside the IC card together with a processor. The... |
| 4984270 |
Method and system for transmission of financial data |
| Jan-8-1991 |
An improved system for transmission financial data includes, in preferred embodiments, an encryption key stored on a bank card and used to encrypt preselected data prior to transmission. Encrypted data... |
| 4972472 |
Method and apparatus for changing the master key in a cryptographic system |
| Nov-20-1990 |
A method and apparatus for changing the key in a cryptographic system or device are disclosed. A memory contains three storage areas for pending, active, and retired keys. New keys are loaded into the... |
| 4961142 |
Multi-issuer transaction device with individual identification verification plug-in application modules for each issuer |
| Oct-2-1990 |
A transaction terminal for use with diverse credit or other transaction cards is provided with an interface unit for receiving a plurality of modules, wherein each module contains programming information... |
| 4933971 |
Method for encrypting transmitted data using a unique key |
| Jun-12-1990 |
The invention comprises a method for encrypting data for communication between a host computer and each of a plurality of remote terminals in a network. A method is provided for periodically generating... |
| 4924514 |
Personal identification number processing using control vectors |
| May-8-1990 |
Cryptographic PIN processing is achieved in an improved manner by associating control vectors with the PIN generating (verification) keys and PIN encrypting keys which provide authorization for the uses... |
| 4912762 |
Management of cryptographic keys |
| Mar-27-1990 |
A method for simplifying key management in situations where unique cryptographic keying relationships are required end-to-end between pairs of parties and a symmetric encryption algorithm is to be used.... |
| 4885788 |
IC card |
| Dec-5-1989 |
An IC card having an authentication code which is compared with an authentication code obtained by processing data recorded on the IC card, and permitting the IC card to be used only when agreement is... |
| 4797920 |
Electronic funds transfer system with means for verifying a personal identification number without pre-established secret keys |
| Jan-10-1989 |
An electronic funds transfer system employs a means to verify a personal identification number PE entered by the user with the correct PIN (PT) stored at the host terminal. The remote and host terminals... |
| 4747050 |
Transaction security system using time variant parameter |
| May-24-1988 |
An electronic funds transfer system (EFT) is described in which retail terminals located in stores are connected through a public switched telecommunication system to card issuing agencies data processing... |
| 4731842 |
Security module for an electronic funds transfer system |
| Mar-15-1988 |
A security module for use in an electronic funds transfer terminal is contained in a tamper-resistant housing. The module has a PIN pad and is designed to encrypt secret data, such as users personal identity... |
| 4633037 |
Generation of identification keys |
| Dec-30-1986 |
Commercial transactions conducted over a telecommunications link are verified using a transaction key available at both ends of the link. The transaction key is produced by combining (1) data supplied... |
| 4605820 |
Key management system for on-line communication |
| Aug-12-1986 |
The subject invention relates to a new and improved key management system particularly suited to facilitate communication between point of sale terminals and a host processor. The system provides for the... |
| 4578530 |
End-to-end encryption system and method of operation |
| Mar-25-1986 |
An efficient end-to-end encryption system including key management procedures for providing secure, financial data communication between a system user at one of a plurality of transaction terminals of... |
| 4536647 |
Pocket banking terminal, method and system |
| Aug-20-1985 |
A portable banking terminal under control of an authorized user and operating within a system of banks and retailers may be initialized for personal use under separate controls by the banks and the retailers... |
| 4500750 |
Cryptographic application for interbank verification |
| Feb-19-1985 |
In a data communication network which includes terminals interconnected via a central switch, a process for verifying the identity of a terminal user who is provided with secret data associated with his... |
