Showing papers on "Multiple encryption published in 1987"
Patent•
01 May 1987
TL;DR: In this article, the authors proposed an encryption transformation where the results of successive encryptions does not depend on the order of encryption, so that the user-entered PIN can be verified without the need to share en encryption key between the remote and host terminals.
Abstract: 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 each generate an encryption key, and encrypt PE and PT at the respective terminals. These values are transmitted to the other terminal, where they are re-encrypted using the other encryption key. The double-encrypted numbers are then compared. The user-entered PIN can thus be verified without the need to share en encryption key between the remote and host terminals. The encryption transformation is of the type where the results of successive encryptions does not depend on the order of encryption.
132 citations
Patent•
19 Jun 1987
TL;DR: In this article, 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, which is then transmitted through all intermediate computers without decryption and reencryption.
Abstract: 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 is then transmitted through all intermediate computers without decryption and reencryption. Decryption occurs only at the final destination, where the encryption key has been stored. In preferred embodiments, the encryption key is combined with a terminal identification valve to provide further security.
75 citations
TL;DR: The power of Partitioned Encryption is demonstrated: combining it with the partitioning of the user set gives a solution scheme for ‘Verifiable Secret Sharing’ and ‘Simultaneous Broadcast in the Presence of Faults’, which are important primitives of fault-tolerant distributed computing introduced by Chor, Goldwasser, Micali and Awerbuch (1985).
28 citations
5 citations
Patent•
05 Mar 1987
TL;DR: In this paper, a method for delay-free encryption of digitised, unencrypted or pre-encrypted information using retrieval information (800) provided by a higher-order arrangement or derived from the un-encrypted or pretax information (700), one encryption function value in each case being retrieved, synchronously with the retrieval information and for the purposes of encryption by an encryption function (900), from a pre-defined quantum (600) of encryption function values which are genuinely random in terms of the autocorrelation function.
Abstract: The invention relates to a method for delay-free encryption (900) of digitised, un-encrypted or pre-encrypted information (700) using retrieval information (800) provided by a higher-order arrangement or derived from the un-encrypted or pre-encrypted information (700), one encryption function value in each case being retrieved, synchronously with the retrieval information (800) and for the purposes of encryption by an encryption function (900), from a pre-defined quantum (600) of encryption function values which are genuinely random in terms of the autocorrelation function. The decryption of encrypted information (700, 1000) is described by the same method.
1 citations
Patent•
18 Mar 1987
TL;DR: An inexpensive encryption device, system and method as discussed by the authors includes coded alphanumeric characters (9,ll) preprinted according to different keycodes on mail-out forms that can be manipulated by a prospective user to yield encrypted data that can then be returned over unsecure transmission channels for secure decryption by the operator of a computer-secured operating system.
Abstract: An inexpensive encryption device, system and method
includes coded alphanumeric characters (9,ll) preprint
ed according to different keycodes on mail-out
forms that can be manipulated by a prospective
user to yield encrypted data that can be returned
over unsecure transmission channels for secure
decryption by the operator of a computer-secured
operating system.
1 citations