Variant key matrix cipher system

Claim 2

A variant key cryptographic system comprising: input means for introducing a plurality of electrical signals in binary form as message information to be enciphered or deciphered; priming means for presenting a plurality of random binary signals to said input means to initialize the system prior to introducing message information thereto, matrix storage means for arranging a cipher key in an n×m matrix array, wherein m and n are greater than 1; a plurality of modulo-two adders interconnected with each other for adding selected elements from said matrix with binary signals obtained from said input means; feedback means connected to said plurality of modulo-two adders; non-affine transformation means connected to said feedback means for transforming the feedback signals present on the lines contained in said feedback means; shift control means connected to said non-affine transformation means for rearranging selected matrix elements within said n×m matrix array.

Claim 3

The system as defined in claim 1 wherein said plurality of modulo-two adders are arranged in a cascaded fashion.

Claim 4

The system as defined in claim 2 wherein said priming means is an external source of random binary signals.

Claim 5

The system as defined in claim 2 wherein said feedback means further comprises a plurality of lines connected to intermediate stages of said modulo-two adders and at least one line connected to an element within said matrix which element is also connected to one of said plurality of modulo-two adders.

Claim 6

The system as defined in claim 4 wherein said non-affine tranformation means is a substitution device.

Claim 7

The system as defined in claim 5 wherein said substitution device comprises coding-decoding means for converting from one base number to another base number.

Claim 8

The system as defined in claim 6 wherein said matrix consists of a plurality of shift registers each capable of shifting information within the register for rearranging a column or row of the matrix; shift control output means for specifying the number of shifts that are to be executed by each of said plurality of shift registers.

Claim 9

A variant key cryptographic system comprising: input means for introducing a plurality of electrical signals in binary form as message information to be enciphered or deciphered; priming means for presenting a plurality of pseudo-random binary signals to the input means to initialize the system prior to introducing message information thereto, matrix storage means for arranging a cipher key in an n×m matrix array wherein m and n are greater than 1; a plurality of modulo-two adders interconnected with each other for adding selected elements from said matrix with binary signals obtained from said input means; feedback means connected to said plurality of modulo-two adders; first non-affine transformation means connected to said feedback means for transforming the feedback signals present on the lines contained in said feedback means; shift control means connected to said first non-affine transformation means for rearranging selected matrix elements within said n×m matrix array; second feedback means connected to selected elements of said matrix for providing a binary word to a second non-affine transformation means; said second non-affine transformation means generating a variant binary vector that is stored in selected elements within the key matrix.

Claim 10

A variant key cryptographic system comprising: input means for introducing a plurality of electrical signals in binary form as message information to be enciphered or deciphered; priming means for presenting a plurality of pseudo-random binary signals to the input means to initialize the system prior to introducing message information thereto, matrix storage means for arranging a cipher key in an n×m matrix array wherein m and n are greater than 1; a plurality of modulo-two adders interconnected with each other for adding selected elements from said matrix with binary signals obtained from said input means; feedback means connected to said plurality of modulo-two adders; first non-affine transformation means connected to said feedback means for transforming the feedback signals present on the lines contained in said feedback means; shift control means connected to said first non-affine transformation means for rearranging selected matrix elements within said n×m matrix array; second feedback means connected to selected elements of said matrix for providing a binary word to a second non-affine transformation means; said second non-affine transformation means generating a variant binary vector that is stored in selected elements within the key matrix.

Claim 11

The system as defined in claim 8 wherein said second non-affine transformation means is a substitution device. .Iadd.

Claim 12

A variant key cryptographic system comprising: means for introducing a plurality of electrical signals in binary form as message information to be enciphered or deciphered; priming means for presenting a plurality of random binary signals to said input means to initialize the system prior to introducing message information thereto, means for storing and rearranging a cipher key, a plurality of modulo-two adders interconnected with each other for adding selected elements from said storage means with binary signals obtained from said input means; feedback means connected to said plurality of modulo-two adders; non-affine transformation means connected to said feedback means for transforming the feedback signals present on the lines contained in said feedback means; control means connected to said non-affine transformation means for rearranging selected elements within said storage means. .Iaddend. .Iadd.

Claim 13

A variant key cryptographic system comprising: means for introducing a plurality of electrical signals in binary form as message information to be enciphered or deciphered; priming means for presenting a plurality of random binary signals to said input means to initialize the system prior to introducing message information thereto, means for storing and rearranging a cipher key, a plurality of modulo-two adders interconnected with each other for adding selected elements from said storage means with binary signals obtained from said input means; feedback means connected to said plurality of modulo-two adders; non-affine transformation means connected to said feedback means for transforming the feedback signals present on the lines contained in said feedback means; control means connected to said non-affine transformation means for rearranging selected elements within said storage means. .Iaddend. .Iadd.

Claim 14

A variant key cryptographic system comprising; input means for introducing a plurality of electrical signals in binary form as message information to be enciphered or deciphered; priming means for presenting a plurality of pseudo-random binary signals to the input means to initialize the system prior to introducing message information thereto, storage means for storing and rearranging a cipher key; a plurality of modulo-two adders interconnected with each other for adding selected elements from said storage means with binary signals obtained from said input means; feedback means connected to said plurality of modulo-two adders; first non-affine transformation means connected to said feedback means for transforming the feedback signals present on the lines contained in said feedback means; control means connected to said first non-affine transformation means for rearranging selected elements within said key storage means; second feedback means connected to selected elements of said storage means for providing a binary word to a second non-affine transformation means; said second non-affine transformation means generating a variant binary vector that is stored in selected elements within the key storage means. .Iaddend.

Claim 15

A variant key cryptographic system comprising; input means for introducing a plurality of electrical signals in binary form as message information to be enciphered or deciphered; priming means for presenting a plurality of pseudo-random binary signals to the input means to initialize the system prior to introducing message information thereto, storage means for storing and rearranging a cipher key; a plurality of modulo-two adders interconnected with each other for adding selected elements from said storage means with binary signals obtained from said input means; feedback means connected to said plurality of modulo-two adders; first non-affine transformation means connected to said feedback means for transforming the feedback signals present on the lines contained in said feedback means; control means connected to said first non-affine transformation means for rearranging selected elements within said key storage means; second feedback means connected to selected elements of said storage means for providing a binary word to a second non-affine transformation means; said second non-affine transformation means generating a variant binary vector that is stored in selected elements within the key storage means. .Iaddend.