Method and system for secure cryptographic exchanges using a five-pass protocol

Abstract

Cryptographic techniques are disclosed which employ at least a five-pass protocol (5PP) for a cryptographic exchange of a secret data matrix between two computer systems. This 5PP approach improves the functioning of the computer systems by making their encrypted communications more resistant to potential quantum computing-based attacks while still resisting brute-force attacks by eavesdroppers. For example, the 5PP approach can be used to improve public-key cryptography. The system may comprise a first computer system and a second computer system, where a secret data matrix is known by the first computer system but is not shared with the second computer system in unobscured form. The first and second computer systems can be configured to communicate with each other over a network to share a series of at least five messages in at least five passes between each other that collectively hide the secret data matrix using reversible logic operations that obscure the secret data matrix according to at least five parameters of which (1) at least two are known by the first computer system but are not shared with the second computer system in unobscured form and (2) at least three are known by the second computer system but are not shared with the first computer system in unobscured form.