| 5436970 |
Method and apparatus for transaction card verification |
| Jul-25-1995 |
Techniques for multiple verification of transaction cards incorporating digital image information and authorization data onto a transaction card to assist in the card verification process. This technique... |
| 5396558 |
Method and apparatus for settlement of accounts by IC cards |
| Mar-7-1995 |
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... |
| 5379344 |
Smart card validation device and method |
| Jan-3-1995 |
A validation device (2) for a smart card (1) of the kind having unprotected data storage memory (4) and protected data storage memory (5) selectively accessible by means of a user access code. The device... |
| 5365466 |
Method for generating a random number in a system with portable electronic objects, and system for implementing the method |
| Nov-15-1994 |
A method for generating a random number in a system utilizing portable objects, such as cards with electronic memories and data processing circuits, wherein the data processing circuits (TC) of the portable... |
| 5355413 |
Authentication method performed between IC card and terminal unit and system therefor |
| Oct-11-1994 |
In an authentication method between an IC card and a terminal unit, authentication is performed without an authentication code or an address therefor being transmitted directly between the two devices... |
| 5343530 |
Method for the authentication of data |
| Aug-30-1994 |
Disclosed is a method of authentication of data elements of the type that may be needed, for example, to authenticate a chip card before permitting a transaction instrument to deliver a service to the... |
| 5317637 |
Data exchange system with a check of the apparatus for its authentication status |
| May-31-1994 |
The invention relates to a data exchange system wherein the entitlement of a user is detected by a check of a personal feature inputted by the user, comprising a data carrier associated with the user,... |
| 5311595 |
Method of transferring data, between computer systems using electronic cards |
| May-10-1994 |
When transferring data, an electronic document or the like from a first computer system (100) to a second computer system (200) via a data transmission line (300), e.g. a public data transmission line,... |
| 5299263 |
Two-way public key authentication and key agreement for low-cost terminals |
| Mar-29-1994 |
A method for achieving mutual authentication and session key agreement between a first party 12 which has minimal computational resources and a second party 18 which has substantial computational resources... |
| 5267315 |
Secret identification number checking system |
| Nov-30-1993 |
The present invention relates to a secret identification number checking system for comparing a secret identification number stored in a magnetic card (11) and a secret identification number entered by... |
| 5265162 |
Portable pin card |
| Nov-23-1993 |
A portable Personal Identification Card allows a cardholder to enter a PIN code into his card at a location remote from an authorization terminal. In an alternate embodiment, a PIN code may be entered... |
| 5253295 |
Process for authentication, by an outside medium, of a portable object connected to that medium via a transmission line and system for carrying out the process |
| Oct-12-1993 |
A process of authentication, by an outside medium, of a portable object connected to that medium via a transmission line and a system for carrying out the process. To authenticate a portable object (7)... |
| 5245657 |
Verification method and apparatus |
| Sep-14-1993 |
A prover possessing public information and related secret information sends the public information and an initial message to a verifier. The verifier sends back a random message and an enquiry generated... |
| 5218637 |
Method of transferring a secret, by the exchange of two certificates between two microcomputers which establish reciprocal authorization |
| Jun-8-1993 |
According to the invention, the chip card issues a first certificate comprising its letter of credentials (Crc), an exponential (X), an optional message (M), these quantities being signed. The security... |
| 5140634 |
Method and apparatus for authenticating accreditations and for authenticating and signing messages |
| Aug-18-1992 |
A method and system for authentication of accreditations and of messages with zero-knowledge proof and for the signing of messages, and a station for use in such system, in particular executed as a smart... |
| 5130519 |
Portable pin card |
| Jul-14-1992 |
A portable Personal Identification Card allows a cardholder to enter a PIN code into his card at a location remote from an authorization terminal. In an alternate embodiment, a PIN code may be enterd at... |
| 5109152 |
Communication apparatus |
| Apr-28-1992 |
This invention is intended for the communication between a first communication device (e.g., an IC card) and a second communication device (e.g., a card terminal) by preventing the faking of the IC card... |
| 5068894 |
Method of generating a unique number for a smart card and its use for the cooperation of the card with a host system |
| Nov-26-1991 |
A smart card (1) which includes a random access memory RAM (10) and a read-only memory PROM (7) incorporating a production key (PK), a distributor key (MK), a bearer code (CP) and a serial number (NS)... |
| 5036461 |
Two-way authentication system between user's smart card and issuer-specific plug-in application modules in multi-issued transaction device |
| Jul-30-1991 |
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... |
| 5020105 |
Field initialized authentication system for protective security of electronic information networks |
| May-28-1991 |
An authentication system for electronic information networks having small hand-held portable authenticating devices which are remotely initialized and can use 4 bit microprocessors in a challenge-response... |
| 5003594 |
Portable electronic device and its secret information collation method |
| Mar-26-1991 |
A secret information collation method is used between electronic apparatuses that included a portable electronic device and an information processing device. The portable electronic device can include... |
| 4995082 |
Method for identifying subscribers and for generating and verifying electronic signatures in a data exchange system |
| Feb-19-1991 |
In a data exchange system working with processor chip cards, a chip card transmits coded identification data I, v and, proceeding from a random, discrete logarithm r, an exponential value x=2.sup.r (mod... |
| 4974193 |
Circuit arrangement for protecting access to a data processing system with the assistance of a chip card |
| Nov-27-1990 |
Dependent on a variable start value (s), a random number according to the relationship v=f (K;s) is generated from a ciphering algorithm (f) implemented in the microprocessor of the chip card and from... |
| 4962531 |
Transaction system comprising one or more host exchanges and a number of distributed terminal stations |
| Oct-9-1990 |
A transaction system comprises terminal stations which can communicate with a host exchange. In order to improve the communication, concentrators are arranged between the host exchange and the terminal... |
| 4935962 |
Method and system for authentication |
| Jun-19-1990 |
An entity such as a smart card includes microprocessor means, input/output means, and PROM storage means which stores a set of transformations S.sub.i (i=1, . . . , n) of a corresponding set of public... |
| 4926479 |
Multiprover interactive verification system |
| May-15-1990 |
In a multiparty verification system, a prover and a verifier are coupled to rocess respective outputs to provide a system output such as an identification verification. The prover is formed of plural units... |
| 4910774 |
Method and system for suthenticating electronic memory cards |
| Mar-20-1990 |
The method in suitable for authenticating electronic memory cards intended for authorizing the supply of goods or services after being processed by a card reader machine. The card memory includes at least... |
| 4890323 |
Data communication systems and methods |
| Dec-26-1989 |
In order to improve the security of message transmission from a terminal apparatus in an electronic banking or other data communications system a check-sum or MAC is computed from the data within the message... |
| 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... |
| 4827113 |
Technique for authenticating IC card and terminal |
| May-2-1989 |
An IC card is placed on a card terminal main body, and an internal IC of the IC card is electrically connected to an electrical circuit in a terminal through a connector. Input data entered by a card holder... |
| 4823388 |
Communications network using an enciphering and deciphering device |
| Apr-18-1989 |
A communications network system is constructed by connecting a plurality of customer terminals to one central terminal via communication lines. Enciphering devices and a deciphering device, such as IC... |
| 4809326 |
IC card system |
| Feb-28-1989 |
Application program data is sent with decryption key code data from an initializing IC card to an application program RAM arranged in an IC card terminal. The terminal is then initialized, and customer... |
| 4802218 |
Automated transaction system |
| Jan-31-1989 |
An automated transaction system employs a card maintaining an account balance and a terminal for dispensing an article of value and debiting the card's balance. The card has a secure, resident microprocessor... |
| 4746788 |
Identification system for authenticating both IC card and terminal |
| May-24-1988 |
Data unique to an IC card and encrypted unique data obtained by encrypting the unique data are previously stored in the IC card. The encrypted unique data is decrypted in an IC card terminal, to obtain... |
| 4720859 |
Method and system for the mutual encyphered indentification between data communicating stations and stations for use with such method and system |
| Jan-19-1988 |
A method for transmitting ciphered information between two stations while using session keys. According to the method a mutual identification of the stations (AK, A; A,B) is obtained while using an identification... |
| 4665396 |
Validation check for remote digital station |
| May-12-1987 |
A cryptographic validation for an external station of a communication system provided with a central data processing device, a number of access stations which are coupled thereto and a number of external... |
| 4656474 |
Process and apparatus for authenticating the signature of a signed message |
| Apr-7-1987 |
A process and a device for authenticating the signature of a signed message includes a nominal signature card (1a) coupled to a transmitting device 1 which sends signed messages. The card (1a) includes... |
| 4612413 |
Authentication system between a card reader and a pay card exchanging data |
| Sep-16-1986 |
A reciprocal authentication system between two groups of electronic units which can be interconnected for the exchange of data. The system periodically supplies a variable access key for the encrypting... |
| 4590470 |
User authentication system employing encryption functions |
| May-20-1986 |
A system which employs a pair of encryption functions f and g in the "log on" protocol of a computer dial-up arrangement. The functions are inverses of each other and, hence, a random sequence when encrypted... |
| 4450535 |
System and method for authorizing access to an article distribution or service acquisition machine |
| May-22-1984 |
A system and method for distribution of articles or services, especially adapted to be secure against use by unauthorized personel, receives first and second data carriers. Each data carrier includes a... |
| 4215421 |
Data-processing system which protects the secrecy of confidential data |
| Jul-29-1980 |
A data processing system is provided which protects the secrecy of confidential data at the stages where it is formulated and transmitted to a card (first auxiliary member) having a code key thereon. The... |
