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2 pointing out, your suggested interpretation
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Nowhere in thetheir documentation does it make any reference to private vs public key, so I'm immediately suspicious. In my experience, many people get very confused about the difference (e.g., "So I send you the private key so you can encrypt privately just to me right?"). I'm not aware of any PGP key having a passphrase on the public key, so.

So I would suspect that some users are sending in their private keys and the author of the document couldn't open them so started asking for the passphrase, not knowing they are different.

Nowhere in the documentation does it make any reference to private vs public key, so I'm immediately suspicious. In my experience, many people get very confused about the difference (e.g., "So I send you the private key so you can encrypt privately just to me right?"). I'm not aware of any PGP key having a passphrase on the public key, so I would suspect that some users are sending in their private keys and the author of the document couldn't open them so started asking for the passphrase, not knowing they are different.

Nowhere in their documentation does it make any reference to private vs public key, so I'm immediately suspicious. In my experience, many people get very confused about the difference (e.g., "So I send you the private key so you can encrypt privately just to me right?"). I'm not aware of any PGP key having a passphrase on the public key.

So I would suspect that some users are sending in their private keys and the author of the document couldn't open them so started asking for the passphrase, not knowing they are different.

1
source | link

Nowhere in the documentation does it make any reference to private vs public key, so I'm immediately suspicious. In my experience, many people get very confused about the difference (e.g., "So I send you the private key so you can encrypt privately just to me right?"). I'm not aware of any PGP key having a passphrase on the public key, so I would suspect that some users are sending in their private keys and the author of the document couldn't open them so started asking for the passphrase, not knowing they are different.