Authenticated lattice-based key agreement or key encapsulation

Abstract

Some embodiments are directed to a system with a first cryptographic device (10) and second cryptographic device (20). The devices may compute a final seed from a preshared secret known to the devices, and on a pre-seed that exchanged between them. The final seed may be used to derive a common object (a).

Description

technical field [0001] The presently disclosed subject matter relates to a first cryptographic device, a second cryptographic device, a first cryptographic method, a second cryptographic method, and a computer-readable medium. Background technique [0002] In cryptography, a key agreement protocol is an agreement by which two or more parties can agree on such a key. For example, the agreed upon key may be used to secure further communications between the parties, eg, to authenticate and / or encrypt further communications. An attacker who eavesdrops on all communications between the two parties should know nothing about the key. However, although an attacker who sees the same communication knows nothing or very little, both parties themselves can derive the shared secret. [0003] Practical key agreement protocols were introduced in 1976 when Whitfield Diffie and Martin Hellman introduced the concept of public key cryptography. They propose a system for key agreement betwee...

AI Technical Summary

Problems solved by technology

Cryptographic devices and methods are described and claimed herein to address these and other problems

Images