Patent ID: 7606361
Filing Date: 2009-10-20
Classification: H04L

Abstract:
1. A method of sending a message securely from a sender system to a receiver system over an insecure channel, said method comprising: encoding said message in the form of a singular matrix; multiplying said singular matrix with a first non-singular matrix to obtain a first cipher data; sending said first cipher data, containing said message, to said receiver system over said insecure channel; receiving said first cipher data in said receiver system; multiplying said first cipher data with a second non-singular matrix to obtain a second cipher data in said receiver system; sending said second cipher data, containing said message, to said sender system over said insecure channel; receiving in said sender system said second cipher data over said insecure channel; multiplying said second cipher data with an inverse of said first non-singular matrix to obtain a third cipher data; sending said third cipher data, containing said message, to said receiver system over said insecure channel; and multiplying said third cipher data with an inverse of said second non-singular matrix to obtain said message in said receiver system, whereby said message is sent securely from said sender system to said receiver system over said insecure channel without key exchange between said sender system and said receiver system.