The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2008
Filed:
Dec. 16, 2003
Henri Gilbert, Bures-sur-Yvette, FR;
Gilles Macario-rat, Vanves, FR;
Dimitri Mouton, Paris, FR;
France Telecom, Paris, FR;
Abstract
A method of enciphering information constituted by a finite sequence {S,S, . . . ,S} of N symbols (S,S, . . . ,S) selected from an alphabet A. There are defined both a secret convention of p key symbols K, . . . ,Kselected form a second alphabet B, and a multivariate function M having m+1 variables (m<=N): M(X, . . . ,X,Y) operating A□B in A, {i, . . . ,i} being m distinct indices in the range [1,N] and the function M being bijective relative to at least one (X) of the m variables of A. A succession of X permutations are performed on the sequences {S,S, . . . ,S} such that where {S,S, . . . ,S} is the sequence prior to the jpermutation, the sequence after the jpermutation is {S,S, . . . ,S,Zj}, where Zj is equal to M(S, . . . ,S,K) the enciphered information being constituted by the sequence {S',S′, . . . ,S′} obtained after the Xpermutation.