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PGP keysigning

PGP keysigning. Andrew Cormack and friends. Why?. Two functions of PGP to send secret information to prove origin Already know a message relates to a key but not a person Here establish identity of owner Trust can be done later, by e-mail. How?. Now Later. What to sign?.

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PGP keysigning

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  1. PGP keysigning Andrew Cormack and friends

  2. Why? • Two functions of PGP • to send secret information • to prove origin • Already know a message relates to a key • but not a person • Here establish identity of owner • Trust can be done later, by e-mail

  3. How? • Now • Later

  4. What to sign? • Key looks like this • mQENAzbbyOwAAAEIALIR3zaj1EL+SyQ46ug7JKHRNSvtXzEymiMnt1Cwn+j3rK0cUIHHoeVCFF6kIgr7kzJ7O80l9ySob/Djsh3W644nih1xglFJwT2AMtdfZ6TV3djQRKO8U6d9QNcNrg0gpf/KmX0iugOHJGY3DY5cLbvjZ7cMkP+GTOAReF/30l... • Fingerprint - a 128 bit hash value is better • DDC3 B5E4 FF84 0BD3 F290 FD48 B73D 1AD9

  5. Trusted Introducers • Follow documented procedure • Verify individuals’ • Identity • Ownership of key • Sign keys which have been verified • Distribute signed keys to participants

  6. Participants • May rely on trusted introducers • and sign keys which have been signed by them • if they are satisfied with the procedure • and believe it has been followed correctly • Or may do their own verification • using whatever protocol they choose

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