[Thread] Apple built its own hardware security modules for its iCloud infrastructure in China after sources say China refused to certify HSMs made by Thales (Matthew Green/@matthew_d_green)

Matthew Green / @matthew_d_green:
[Thread] Apple built its own hardware security modules for its iCloud infrastructure in China after sources say China refused to certify HSMs made by Thales  —  Ok let's talk about the concrete technical bits. Big parts of iCloud rely on special devices called Hardware Security Modules, or HSMs. These are specialized computers that store keys. In the US, Apple uses Thales HSMs.

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