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Post-Quantum Extended Diffie–Hellman — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Post-Quantum_Extended_Diffie%E2%80%93Hellman
License (as archived): CC-BY-SA-4.0
Archived: 2026-10-05T23:15:29.503Z
SHA-256 of the archived text: 14fe992f903011647064af8b17dac59d684034bf23e19dfa2fb7a89d72a01ea7
Stable URL of this page: https://metraipolis.com/documento/dc_73dbddfc3787

How to cite

Post-Quantum Extended Diffie–Hellman — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Post-Quantum_Extended_Diffie%E2%80%93Hellman (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_73dbddfc3787 (Metraipolis archive dc_73dbddfc3787, sha256 14fe992f903011647064af8b17dac59d684034bf23e19dfa2fb7a89d72a01ea7)

BibTeX

@misc{dc73dbddfc3787,
  title = {Post-Quantum Extended Diffie–Hellman — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Post-Quantum_Extended_Diffie%E2%80%93Hellman},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_73dbddfc3787; sha256 14fe992f903011647064af8b17dac59d684034bf23e19dfa2fb7a89d72a01ea7},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Post-Quantum_Extended_Diffie%E2%80%93Hellman. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

In cryptography, Post-Quantum Extended Diffie–Hellman (PQXDH) is a Kyber-based post-quantum key exchange method based on Diffie–Hellman key exchange. It has been a key part of the Signal Protocol, a popular end-to-end encryption protocol, since 2023. PQXDH is a variant of the X3DH protocol that uses both the quantum-resistant Kyber protocol as well as the classical elliptic curve X25519 protocol. This ensures that an attacker must break both of the encryption protocols to gain access to sensitive data. The protocol is designed for asynchronous communication where the clients exchange public keys through a server to derive a secure shared key which they can use to encrypt sensitive data without needing to constantly sync new keys with each other. In October 2023, the protocol underwent formal verification which managed to "prove all the desired security properties of the protocol" for its second revision. However, PQXDH relies entirely on elliptic curve cryptography for authentication.

Tema degli esploratori: fiducia digitale e crittografia (deposito sistematico; categoria «Public-key cryptography»).
Fonte: Wikipedia in inglese, voce «Post-Quantum Extended Diffie–Hellman» — https://en.wikipedia.org/wiki/Post-Quantum_Extended_Diffie%E2%80%93Hellman
Wikidata Q122973419 (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q122973419
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Post-Quantum_Extended_Diffie%E2%80%93Hellman?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1342133630, consultata il 2026-10-05T23:03:33.860Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: b643e95a09bb828d5eb934935c9ec78897907df2173c9b7da6dd80c9dbaff77b