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Typically a few methods of establishing a shared secret (temporary or permanent) requires at least two active parties to be online at the same time to do the key agreement live. What Maarten proposes is to simply store a draft message secured somewhere only User A can access until User B gets to finalize a shared secret with User A then is the secured ...


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Your fingerprint is for OpenPGP V4 compatible as it uses SHA-1. The fingerprint is 20 bytes instead of 16 for MD5 used in the older package format. For V4 it is required to extract the public key packet first. This is likely to be the most tricky part, as PGP uses it's own packet format. You'll have to parse the binary data within your base 64 encoded blob ...


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The number of your ID card is not really a secret, and probably shouldn't even considered one. You could use it as a key for symmetric encryption (but for this purpose you'd have to share it with your communication partners, and everybody knowing the ID could read the communication), but not for public/private key cryptography. This is the reason why the ...



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