Systems and methods for blockchain-based secure key exchange

• Main Authors: Stokes, John M, Caceres, Manuel Enrique, Low, Mun Wei, He, Dayong, Uy, Warren Hojilla, Choi, Young Rak
• Format: Patent
• Language: English
• Published: 19.12.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

A system described herein provide for the secure maintaining and providing of information, such as public keys used in Public Key Infrastructure ("PKI") techniques or other techniques, using a secure distributed ledger (e.g., "blockchain") system. A blockchain system may be utilized in lieu of a key escrow system in the exchange and/or providing of public keys in a Diffie-Hellman key exchange technique or other type of technique in which public keys are provided from one entity to another. A first entity may generate an asymmetric key pair that includes a public key and a private key, and may provide the public key to a blockchain system for retrieval by one or more other entities. For example, the entities may be engaged in a secure messaging session, in which messages are encrypted and may be decrypted using one or more keys, including the public key.