Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 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 (7) connected to a terminal linked to the outside medium ... | 10/12/1993 |
| 5225664 | Mutual authentication system When mutual authentication is effected between an IC card and a host device, key data and random number data transmitted from the host device are immediately subjected to the encrypting process without storing the same into a RAM of the IC card, and only ... | 07/06/1993 |
| 5224164 | Method and apparatus for transliterating messages It is the object of the invention to realize a low-cost, low-effort cryptoanalytically secure encrypting/decrypting method for high data rates and large code key spaces. The solution provides for a message encrypting/decrypting system whereby the keys are... | 06/29/1993 |
| 5214701 | Method of processing data by compression and permutation for microcircuit cards This method of processing data protected by a coding is particularly suitable to be used in microcircuit cards utilizing the method of processing data of the DES type. In the DES method, a step SP of transformation of compression S is included, which is f... | 05/25/1993 |
| 5210795 | Secure user authentication from personal computer A method and apparatus for authenticating a human user on a personal computer without requiring the user to expose his password or authentication secret to the personal computer of a server. Also a method for protecting a floppy disk with login software f... | 05/11/1993 |
| 5202923 | Portable electronic device capable of registering subprograms After registration of a subprogram is completed, a flag indicating that the subprogram has been registered is set. The flag is referred to in response to a subprogram registration request from an IC card reader/writer. Registration of the subprogram is pe... | 04/13/1993 |
| 5202922 | Data communication system When a final session is performed between a host device and an IC card, common key data stored in the host device is encrypted by an updated session key and transmitted to the IC card in which the encrypted common key data is decrypted by the the same upd... | 04/13/1993 |
| 5146499 | Data processing system comprising authentification means viz a viz a smart card, an electronic circuit for use in such system, and a procedure for implementing such authentification Authentication of a smart card is accomplished utilizing a microcomputer (PC) provided with an internal reader (RD) and an electronic circuit (3) linked to the PC. The circuit (3) includes a microprocessor (MP) capable of generating a random factor (RN). ... | 09/08/1992 |
| 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 smart card station. Instead of using multiple accreditations a... | 08/18/1992 |
| 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 card or card terminal, for example, thereby allowing corr... | 04/28/1992 |
| 5103478 | Secure management of keys using control vectors with multi-path checking A requested cryptographic function is validated for performance in conjunction with a cryptographic key, by inputting a first portion of an associated control vector into a first control vector checker, which outputs a first authorization signal if the re... | 04/07/1992 |
| 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 (NS) generates a unique number (NU) which is stored in the ... | 11/26/1991 |
| 5048085 | Transaction system security method and apparatus An improved security system is disclosed which uses an IC card to enchance the security functions involving component authentication, user verification, user authorization and access control, protection of message secrecy and integrity, management of cryp... | 09/10/1991 |
| 5046094 | Server-aided computation method and distributed information processing unit A server-aided computation method using a main unit for processing secret information and at least one auxiliary unit for supporting a computation that said main unit executes, said method comprising the steps of generating d' from a secret key d' using m... | 09/03/1991 |
| 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 information corresponding to transactions that may be carried o... | 07/30/1991 |
| 5007089 | Secure key management using programable control vector checking The invention includes a control vector checking code respository located either within the same system as the crytographic facility or alternately remotely from the system containing the cryptographic facility. The control vector checking code repository... | 04/09/1991 |
| 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 include an arithmetic processing section and a memory section ... | 03/26/1991 |
| 5001750 | Secret communication control apparatus A secret communication control apparatus used to effect secret communication with communication equipment, for example, facsimile equipment, which transmits picture information by use of public communication lines. When a communication control code that i... | 03/19/1991 |
| 4985920 | Integrated circuit card 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 external memory can be managed only by the processor t... | 01/15/1991 |
| 4985921 | Portable data carrying device With portable data carrying devices, which are intended for the required connection (for example by means of contacts 9) to an external read/write unit in a data exchange system and which contain besides a control unit (2) an additional data memory (5) (b... | 01/15/1991 |
| 4969188 | Process and apparatus for the protection of secret elements in a network of encrypting devices with open key management Each encryption device of a communication network is divided into a base part and a security module in credit card form. The security module contains the functional stages required for the coding/decoding of the keys of lower hierarchical levels under key... | 11/06/1990 |
| 4960982 | IC card with secure mass storage memory An information recording system utilizing an IC card having an onboard microprocessor, an onboard semiconductor memory which can be accessed from outside the card only by way of the microprocessor, and an onboard mass storage device also accessible from o... | 10/02/1990 |
| 4907270 | Method for certifying the authenticity of a datum exchanged between two devices connected locally or remotely by a transmission line The subject of the invention is a method for certifying the authenticity of a datum exchanged between two devices connected locally or at long distance by a transmission line. The transmitting device (2) fashions an enciphered message (M) on the basis of ... | 03/06/1990 |
| 4907272 | Method for authenticating an external authorizing datum by a portable object, such as a memory card The invention relates to a method for authenticating an external authorizing datum by a portable object, such as a memory card. The authorizing datum (C1) entered into an apparatus (2) is enciphered with a predetermined datum (E) to yield a message (M) which i... | 03/06/1990 |
| 4862501 | Communications network using IC cards A communications network has a plurality of customer terminals and a single center terminal which are coupled through communication lines. A large scale integrated circuit is operatively coupled to each terminal. The integrated circuit device has encipher... | 08/29/1989 |
| 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 IC (integrated circuit) cards, are provided for the termi... | 04/18/1989 |
| 4807288 | Microprocessor intended particularly for executing the calculation algorithms of a public code encoding system One chip microprocessor, which is more particularly designed to execute culation algorithms of a public code encoding system formed by a public function and a secret inverse function of the type comprising at least one programmable read-only memory, a pr... | 02/21/1989 |
| 4757543 | Encrypting and decrypting device which stores an algorithm in a memory A data processing terminal device is on-line connected to a host computer and records on journal paper journal data obtained as a result of communication with the host computer. Data is encrypted, and encrypted data is exchanged between the terminal devic... | 07/12/1988 |
| 4757534 | Code protection using cryptography A cryptographic method for discouraging the copying and sharing of purchased software programs allows an encrypted program to be run on only a designated computer or, alternatively, to be run on any computer but only by the user possessing a designated sm... | 07/12/1988 |
| 4748557 | Data processing terminal device for storing encrypted journal data and decrypting the data A data processing terminal device is on-line connected to a host computer and records on journal paper journal data obtained as a result of communication with the host computer. Data is encrypted, and encrypted data is exchanged between the terminal devic... | 05/31/1988 |
| 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) includes at least one memory (5) in which there are secretly p... | 04/07/1987 |
| 4638120 | Method and system for transmission of confidential data In a system for the transmission of confidential data between a transmitter 1) and a receiver (3), the transmitter (1) transmits a standard key E to the receiver (3). The standard key E preferably is a random number generated within the transmitter (1). An... | 01/20/1987 |
| 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 encrypting of confidential exchanges.... | 09/16/1986 |
| 4549075 | Method for certifying the origin of at least one item of information stored in the memory of a first electronic device and transmitted to a second electronic device, and system for carrying out the method The object of the invention is a process for certifying the origin of at least one item of information stored in the memory of a first electronic device such as a portable card and transmitted to a second electronic device such as a portable card, and a s... | 10/22/1985 |
| 4467139 | Process and system for transmission of signed messages The transmission of signed messages occurs between a transmitter (1) and a receiver (3) connected by a transmission line system (2). The transmitter (1) and the receiver (3) respectively comprise a coding device 7 and a decoding device 11. Means 4 situate... | 08/21/1984 |
