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An analysis of X's new XChat features shows that X can probably decrypt users' messages, as it holds users' private keys on its servers (Matthew Green/Cryptographic Engineering)

Matthew Green / Cryptographic Engineering: An analysis of X's new XChat features shows that X can probably decrypt users' messages, as it holds users' private keys on its servers  —  Update 6/10: Based on a short conversation with an engineering lead at X, some of the devices used at X are claimed to be using HSMs.  See below.

Jun 10, 2025 - 12:10
 0
An analysis of X's new XChat features shows that X can probably decrypt users' messages, as it holds users' private keys on its servers (Matthew Green/Cryptographic Engineering)

Matthew Green / Cryptographic Engineering:
An analysis of X's new XChat features shows that X can probably decrypt users' messages, as it holds users' private keys on its servers  —  Update 6/10: Based on a short conversation with an engineering lead at X, some of the devices used at X are claimed to be using HSMs.  See below.

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