Patent ID: 7783045
Filing Date: 2010-08-24
Classification: H04L

Abstract:
1. A computer program product for use with a digital system, said computer program product comprising a non-transitory computer readable medium having computer readable program code embodied therein, said computer readable program code containing instructions that when executed by a processor of said digital system implement a method of receiving an original message by a receiver from a sender, said method comprising: receiving, by said receiver from the sender, an encrypted second message, a first digital signature, and a hashing algorithm, wherein the encrypted second message had been generated by said sender by encryption of a second message using a public key of the receiver, wherein the second message had been generated by said sender from the original message via performance of a first computational logic of said original message and a first random message on a bit by bit basis to generate said second message, wherein the first digital signature had been generated by the sender by via encryption of a first message digest using a private key of the sender, and wherein the first message digest had been generated by the sender via performance of a one way encryption of the encrypted second message through use of the hashing algorithm; decrypting, by the receiver, the encrypted second message received from the sender, using a private key of the receiver to generate the second message; performing, by said receiver, a second computational logic of said decrypted encrypted second message and a second random message on a bit by bit basis to generate a third message, wherein said second random message differs from said first random message; encrypting, by the receiver, the third message using a public key of the sender to generate an encrypted third message; generating, by the receiver, a second message digest by performing a one way encryption of the encrypted third message through use of the hashing algorithm; encrypting, by the receiver, the second message digest to generate a second digital signature using the private key of the receiver to generate a digital signature; sending, by said receiver, said encrypted third message and said second digital signature to said sender, resulting in receipt of said encrypted third message and said second digital signature by said sender; receiving, by said receiver from the sender, an encrypted fourth message and a third digital signature, wherein the encrypted fourth message had been generated by said sender by encryption of a fourth message using the public key of the receiver, wherein the fourth message had been generated by the sender, after the sender decrypted the encrypted third message to generate the third message, via performance of said first computational logic of said third message and said first random message on a bit by bit basis to generate said fourth message, wherein the third digital signature had been generated by the sender by via encryption of a third message digest using the private key of the sender, and wherein the third message digest had been generated by the sender via performance of a one way encryption of the encrypted fourth message through use of the hashing algorithm; decrypting, by the receiver, the encrypted fourth message received from the sender, using the private key of the receiver to generate the fourth message; and performing, by said receiver, said second computational logic of said decrypted encrypted fourth message and said second random message on a bit by bit basis to generate a fifth message that is identical to said original message.