Bell Telephone Laboratories, Incorporated (Murray Hill NJ 02)
인용정보
피인용 횟수 :
24인용 특허 :
3
초록▼
In a public key cryptographic system (FIG. 1) for communicating securely over an insecure communication channel (3), a sender (1, 2) enciphers a data message (D) using a public enciphering knapsack key (H) to generate an enciphered message (SH). An authorized receiver (4 6, 7, 20, 21, 22) with knowl
In a public key cryptographic system (FIG. 1) for communicating securely over an insecure communication channel (3), a sender (1, 2) enciphers a data message (D) using a public enciphering knapsack key (H) to generate an enciphered message (SH). An authorized receiver (4 6, 7, 20, 21, 22) with knowledge of a private deciphering key (E), a modulus (M) and an integer multiplier (W) generates a private enciphering key (A) which is employed in further enciphering the received enciphered message to form a doubly enciphered message (SE, SE). The doubly enciphered message is deciphered using the private deciphering key alone to recover the original data message.
대표청구항▼
A public key cryptographic system (FIG. 1) for communicating securely over an insecure communication channel (3), the system being of the type including a public enciphering knapsack key (H), a private deciphering key (E), first and second integers (M, W) related to each other and to the private dec
A public key cryptographic system (FIG. 1) for communicating securely over an insecure communication channel (3), the system being of the type including a public enciphering knapsack key (H), a private deciphering key (E), first and second integers (M, W) related to each other and to the private deciphering key according to prescribed criteria wherein the first integer is a modulus M and the second integer is a multiplier W, first enciphering means (1) for transforming a data message (D) with the public enciphering knapsack key into a first enciphered message (SH), means (2) for transmitting the first enciphered message, and receiver means (4-7) for transforming the first enciphered message into the data message (D), the system characterized in that the receiver means includes means (20) responsive to the first and second integers for generating a private enciphering key (A), the private enciphering key is a k-dimensional vector of individual private enciphering key elements (a1 ,-,ak) represented as natural numbers, second enciphering means (21) for transforming the first enciphered message (SH) using the private enciphering key into a second enciphered message (SE), deciphering means (22) for transforming the second enciphered message using the private deciphering key into the data message (D), and the private enciphering key generating means includes an inverter means (30) responsive to the second integer for generating a multiplicative inverse W-1 therefor, and means (32, 33) responsive to the multiplicative inverse and to the modulus M for generating each individual private enciphering key element according to a prescribed criterion, so that ai=2i-1W-1(modulo M), for i=1,2, . . . , k.
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이 특허에 인용된 특허 (3)
Ehrsam William Friedrich (Hurley NY) Meyer Carl H. W. (Kingston NY) Powers Robert Lowell (West Hurley NY) Prentice Paul Norman (Hyde Park NY) Smith John Lynn (Woodstock NY) Tuchman Walter Leonard (Wo, Block cipher system for data security.
Massey James L. (Zurich CA CHX) Omura Jimmy K. (Culver City CA), Method and apparatus for maintaining the privacy of digital messages conveyed by public transmission.
Bosen Robert J. (Pittsburg CA) Tucker James J. (Berkeley CA), Methods and apparatus for controlling access to information processed a multi-user-accessible digital computer.
Murakami,Yasuyuki; Kasahara,Masao; Tsujii,Shigeo, Secret key generating method, common key generating method, encryption method, cryptographic communication method and cryptographic communication system.
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