@mjg59 Reported to
https://support.signal.org/hc/en-us/requests/new. Not holding my breath, probably will be plain ignored...
Also "protecting from 3rd parties via SGX" does not hold in the case of Signal as they have their own data centers. Physical machine is already an enclave if you own it. Plain TPM2 would do.
So there's no actual scenario with SGX for Signal that make sense, plain and simple. Providing CPU attestation to client user would be such scenario, or if Signal was using 3rd party data centers. So it is provably only marketing that they use SGX, and has been that since 2017 when Moxie was around.
Fake marketing scam by definition.