In September 2023, the developers of the Signal Protocol announced that it was being updated to support PQXDH.[1][2][3]
PQXDH is an upgraded version of the X3DH protocol and uses both the quantum-resistant CRYSTALS-Kyber protocol as well as the old elliptic curve X25519 protocol. This ensures that breaking both is required for an attacker must break both of the encryption protocols to gain access to sensitive data, mitigating potential security vulnerabilities the new protocol could have. The protocol is designed for asynchronous communication where the clients exchange public keys through a server to derive a secure shared key with which they can use to encrypt sensitive data without needing to constantly sync new keys with each other.[2][3]
In October 2023, the protocol underwent formal verification which managed to "prove all the desired security properties of the protocol" for its second revision.[4]
post, quantum, extended, diffie, hellman, been, suggested, that, this, article, merged, into, signal, protocol, discuss, proposed, since, october, 2023, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, ci. It has been suggested that this article be merged into Signal Protocol Discuss Proposed since October 2023 This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Post Quantum Extended Diffie Hellman news newspapers books scholar JSTOR September 2023 Learn how and when to remove this template message In cryptography Post Quantum Extended Diffie Hellman PQXDH is a Kyber based post quantum cryptography upgrade to the Diffie Hellman key exchange It is notably being incorporated into the Signal Protocol an end to end encryption protocol In September 2023 the developers of the Signal Protocol announced that it was being updated to support PQXDH 1 2 3 PQXDH is an upgraded version of the X3DH protocol and uses both the quantum resistant CRYSTALS Kyber protocol as well as the old elliptic curve X25519 protocol This ensures that breaking both is required for an attacker must break both of the encryption protocols to gain access to sensitive data mitigating potential security vulnerabilities the new protocol could have The protocol is designed for asynchronous communication where the clients exchange public keys through a server to derive a secure shared key with which they can use to encrypt sensitive data without needing to constantly sync new keys with each other 2 3 In October 2023 the protocol underwent formal verification which managed to prove all the desired security properties of the protocol for its second revision 4 See also editPost quantum cryptography Shor s algorithm Signal Protocol Signal software Public key cryptography End to end encryption Cryptanalysis Diffie Hellman key exchange Symmetric key algorithmReferences edit Signal Messenger Introduces PQXDH Quantum Resistant Encryption Hacker News a b Signal adopts new alphabet jumble to protect chats from quantum computers The Register a b The Signal Protocol used by 1 billion people is getting a post quantum makeover Ars Technica Bhargavan Karthikeyan Jacomme Charlie Kiefer Franziskus Schmidt Rolfe 20 October 2023 An Analysis of Signal s PQXDH Cryspen Blog Cryspen Retrieved 2023 10 22 External links editThe PQXDH Key Agreement Protocol nbsp This cryptography related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Post Quantum Extended Diffie Hellman amp oldid 1190324686, wikipedia, wiki, book, books, library,
