Matches 401 - 450 out of 453 < 1 2 3 4 5 6 7 8 9 10 >
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5737423 Old modified smart card or similar apparatus having a remote inspection capability  
An apparatus and method for remote inspection of a smart card or similar apparatus. A smart card includes an antenna and receiver for receiving transmitted messages and a display. The smart card...
5737421 System for controlling access to a function having clock synchronization  
The system includes a first card-like unit adapted to communicate with a second unit. The second unit grants conditional access to a function or service in accordance with an authentication...
5721781 Authentication system and method for smart card transactions  
An authentication system includes a portable information device, such as a smart card, that is configured to store and process multiple different applications. The smart card is assigned its own...
5671280 System and method for commercial payments using trusted agents  
A system for electronic commercial payment is provided having a customer trusted agent associated with a first money module, a merchant trusted agent that establishes a first cryptographically...
5590197 Electronic payment system and method  
A cyber wallet in the form of stored and protected account information, which may be "carried" on a tamper resistant portable electronic storage medium such as a smartcard, or stored on the...
5581615 Scheme for authentication of at least one prover by a verifier  
A new procedure for authentication of at least one prover by a verifier, the authentication being based on public and secret key cryptographic techniques and making use of a zero-knowledge...
5577121 Transaction system for integrated circuit cards  
A transaction system and method of conducting a transaction between in integrated circuit (IC) card and a transaction terminal which includes a security module comprises establishing communication...
5550919 Method and device for limiting the number of authentication operations of a chip card chip  
To resolve the problems related to the divulgation of the algorithms for the transcoding of the secret codes in chip cards, notably prepayment type chip cards, it is planned to limit the number of...
5534857 Method and system for secure, decentralized personalization of smart cards  
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...
5526428 Access control apparatus and method  
An improved access control apparatus, method, and system are disclosed to enhance the security of information in cards of the type having data storage and functions which are not accessible without...
5502765 Method and apparatus for settlement of accounts by IC cards  
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...
5483597 Authentication process for at least one identification device using a verification device and a device embodying the process  
A a process for the authentication of at least one identification device by a verification device. In this process, authentication is done by a zero knowledge input protocol based on the decoding...
5479511 Method, sender apparatus and receiver apparatus for modulo operation  
An access control system involves a first cryptographic device communicating with a second cryptographic device using a modulo-based protocol. To transmit a message from the first device to the...
5473689 Method for authentication between two electronic devices  
A method for authentication between two electronic devices includes generating at least two random numbers; transmitting the two random numbers, so that both are available in both a first and a...
5436971 Method of and circuit arrangement for checking a smart card  
Prepaid smart cards which serve to procure services, for example from a public telephone, comprise a memory for value units which are debited in conformity with the service procured, i.e. are...
5436970 Method and apparatus for transaction card verification  
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...
5379344 Smart card validation device and method  
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...
5365466 Method for generating a random number in a system with portable electronic objects, and system for implementing the method  
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...
5355413 Authentication method performed between IC card and terminal unit and system therefor  
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...
5343530 Method for the authentication of data  
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...
5317637 Data exchange system with a check of the apparatus for its authentication status  
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...
5267315 Secret identification number checking system  
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...
5265162 Portable pin card  
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...
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  
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...
5245657 Verification method and apparatus  
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...
5218637 Method of transferring a secret, by the exchange of two certificates between two microcomputers which establish reciprocal authorization  
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...
5140634 Method and apparatus for authenticating accreditations and for authenticating and signing messages  
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...
5109152 Communication apparatus  
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...
5068894 Method of generating a unique number for a smart card and its use for the cooperation of the card with a host system  
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...
5036461 Two-way authentication system between user's smart card and issuer-specific plug-in application modules in multi-issued transaction device  
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...
5020105 Field initialized authentication system for protective security of electronic information networks  
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...
5014311 Integrated circuit with an access-controlled data memory  
A method for protecting secret code data stored in a data memory from analysis includes forming conclusions as to the content of the memory from signals at outputs of the memory, and limiting...
5003594 Portable electronic device and its secret information collation method  
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...
4995082 Method for identifying subscribers and for generating and verifying electronic signatures in a data exchange system  
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 r ...
4974193 Circuit arrangement for protecting access to a data processing system with the assistance of a chip card  
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...
4962531 Transaction system comprising one or more host exchanges and a number of distributed terminal stations  
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...
4935962 Method and system for authentication  
An entity such as a smart card includes microprocessor means, input/output means, and PROM storage means which stores a set of transformations S i (i=1, . . . , n) of a corresponding set of public...
4926479 Multiprover interactive verification system  
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...
4910774 Method and system for suthenticating electronic memory cards  
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...
4890323 Data communication systems and methods  
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...
4885788 IC card  
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...
4827113 Technique for authenticating IC card and terminal  
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...
4823388 Communications network using an enciphering and deciphering device  
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...
4809326 IC card system  
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...
4802218 Automated transaction system  
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...
4746788 Identification system for authenticating both IC card and terminal  
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...
4720859 Method and system for the mutual encyphered indentification between data communicating stations and stations for use with such method and system  
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...
4665396 Validation check for remote digital station  
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...
4656474 Process and apparatus for authenticating the signature of a signed message  
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)...
4612413 Authentication system between a card reader and a pay card exchanging data  
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...
Matches 401 - 450 out of 453 < 1 2 3 4 5 6 7 8 9 10 >