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A bit more on Twitter/X’s new encrypted messaging

Matthew Green · published 9 June 2025

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Read the post at blog.cryptographyengineering.com Wayback capture
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5 Jun 2026
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5 Jun 2026
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kaspersky.com
Elon Musk’s XChat: how secure is the new messaging app? | Kaspersky official blog Read at the source ↗
5 Jun 2026

Links from this post

Link
Host
https://x.com/cambridgemike/status/1932260008278012265?s=46
x.com
Twitter's new encrypted DMs aren't better than the old ones Read at the source ↗
mjg59.dreamwidth.org
https://signal.org/docs/specifications/doubleratchet/
signal.org
https://doc.libsodium.org/
doc.libsodium.org
https://about.fb.com/news/2023/12/default-end-to-end-encryption-on-messenger/
about.fb.com
https://juicebox.xyz/
juicebox.xyz
https://blog.cryptographyengineering.com/wp-content/uploads/2025/06/image.png
blog.cryptographyengineering.com
https://blog.cryptographyengineering.com/2016/08/13/is-apples-cloud-key-vault-crypto/
blog.cryptographyengineering.com
https://en.wikipedia.org/wiki/Scrypt
en.wikipedia.org
https://en.wikipedia.org/wiki/Argon2
en.wikipedia.org
https://www.usenix.org/system/files/conference/usenixsecurity17/sec17-lai.pdf
usenix.org
https://dl.acm.org/doi/10.1145/3372297.3417266
dl.acm.org
https://blog.cryptographyengineering.com/2020/07/10/a-few-thoughts-about-signals-secure-value-recovery/
blog.cryptographyengineering.com
https://engineering.fb.com/2021/09/10/security/whatsapp-e2ee-backups/
engineering.fb.com
https://bsky.app/profile/superfell.bsky.social/post/3lr765dux5c2b
bsky.app
https://blog.cryptographyengineering.com/wp-content/uploads/2025/06/image-3.png
blog.cryptographyengineering.com
https://github.com/juicebox-systems/juicebox-hsm-realm
github.com
https://www.entrust.com/products/hsm/nshield-solo
entrust.com
https://juicebox.xyz/blog/running-a-hsm-realm
juicebox.xyz
https://github.com/juicebox-systems/ceremony
github.com
https://blog.cryptographyengineering.com/wp-content/uploads/2025/06/image-4.png
blog.cryptographyengineering.com
https://github.com/imperiopolis
github.com
https://juicebox.xyz/blog/dont-put-all-your-juice-in-one-box
juicebox.xyz
https://juicebox.xyz/assets/whitepapers/juiceboxprotocol_revision7_20230807.pdf
juicebox.xyz
https://blog.cryptographyengineering.com/2018/10/19/lets-talk-about-pake/
blog.cryptographyengineering.com
https://blog.cryptographyengineering.com/2023/05/08/prfs-prps-and-other-fantastic-things/
blog.cryptographyengineering.com
https://en.wikipedia.org/wiki/HMAC
en.wikipedia.org
https://en.wikipedia.org/wiki/CBC-MAC
en.wikipedia.org
https://datatracker.ietf.org/doc/rfc9497/
datatracker.ietf.org
https://blog.cryptographyengineering.com/some-quick-notes-on-t-oprfs/
blog.cryptographyengineering.com
https://blog.cryptographyengineering.com/2025/02/12/u-k-asks-to-backdoor-icloud-backup-encryption/
blog.cryptographyengineering.com
https://github.com/juicebox-systems/juicebox-hsm-realm?tab=readme-ov-file
github.com
https://github.com/signalapp/SecureValueRecovery2
github.com
https://en.wikipedia.org/wiki/Consensus_(computer_science
en.wikipedia.org
https://blog.cryptographyengineering.com/wp-content/uploads/2025/06/image-5.png
blog.cryptographyengineering.com
https://blog.cryptographyengineering.com/wp-content/uploads/2025/06/image-6.png
blog.cryptographyengineering.com