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A comment on Ask HN: Can A give permission to C to access B, without B talking to A?. Parent comment

Re:Ask HN: Can A give permission to C to access B, without B... by kmowery on Friday March 06, 2015 @03:03PM (#9159237)
That's still fairly straightforward; change the message A signs to "I trust Gamma. Nonce: whatever. Valid Until: DateTime". B should then 1) check the signature and 2) check the datetime (in that order).
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