Method and device for protected transmission of data words
First Claim
1. A method for the protected transmission of data words, involvingprovision of a first data word (X1),transformation of the first data word (X1) into a sequence comprising at least one second data word (X2) by a first transformation rule (T1),transformation of at least one of the second data words (X2) into a third data word (X3) by a second transformation rule (T2), andchecking whether a prescribed relationship exists between the third data word (X3) and a comparison data word (VX).
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Accused Products
Abstract
A method for the protected transmission of data words involves provision of a first data word (X1), transformation of the first data word (X1) into a sequence comprising at least one second data word (X2) by a first transformation rule (T1), transformation of at least one of the second data words (X2) into a third data word (X3) by a second transformation rule (T2), and checking whether a prescribed relationship exists between the third data word (X3) and a comparison data word (VX).
22 Citations
22 Claims
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1. A method for the protected transmission of data words, involving
provision of a first data word (X1), transformation of the first data word (X1) into a sequence comprising at least one second data word (X2) by a first transformation rule (T1), transformation of at least one of the second data words (X2) into a third data word (X3) by a second transformation rule (T2), and checking whether a prescribed relationship exists between the third data word (X3) and a comparison data word (VX).
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12. A circuit arrangement for the protected transmission of data words, having
a data input which is connected to a first transformation device (DEC) which transforms a first data word (X1), which is applied to the data input, into a sequence (S2) of data words which comprises at least one second data word (X2), a second transformation device (R1) which is coupled to the first transformation device (DEC) and which transforms at least one of the second data words (X2) into a third data word (X3), a checking device (COMP) which has the third data word (X3) and a comparison data word (VX) supplied to it and which checks whether the third data word (X3) and the comparison data word (VX) are in a prescribed relationship.
Specification