![]() ![]() Without a subkey for encryption, you can't have encrypted e-mails with GnuPG at all. GnuPG actually uses a signing-only key as the primary key, and creates an encryption subkey automatically. In other words, subkeys are like a separate key pair, but automatically associated with your primary key pair. The really useful part of subkeys is that they can be revoked independently of the primary keys, and also stored separately from them. A subkey can be used for signing or for encryption. OpenPGP further supports subkeys, which are like the normal keys, except they're bound to a primary key pair. GnuPG, the implementation used in Debian, picks the right key at any one time. Or, others use the public key to encrypt something, and you use the private key to decrypt it.Īs long as only you have access to the private key, other people can rely on your digital signatures being made by you, and you can rely on nobody else being able to read messages encrypted for you. You use the private key to digitally sign files, and others use the public key to verify the signature. In public key cryptography, a key is actually a pair: a public key, and a private key. Using OpenPGP subkeys in Debian development Translation(s): English - Français - Italiano - Português (Brasil) ![]()
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