When decrypting the files GnuPG automatically selects correct key if it exists in the current keyring, which can be selected with --keyring option, if multiple exist. GnuPG can be also configured to fetch necessary keys from a keyserver if they are available there. You might be also interested in option --batch which makes sure that no interactive questions are asked during excecution. I suggest you read through the GnuPG man page. There are lot of options that might be useful now and then.
How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more.
Ask Question. Asked 9 years, 6 months ago. Active 5 years, 2 months ago. Viewed 22k times. Improve this question. TheDude TheDude 2, 4 4 gold badges 41 41 silver badges 90 90 bronze badges. If this command is given twice, the fingerprints of all secondary keys are listed too.
This command also forces pretty printing of fingerprints if the keyid format has been set to "none". List only the sequence of packets. This command is only useful for debugging. When used with option --verbose the actual MPI values are dumped and not only their lengths.
Note that the output of this command may change with new releases. Present a menu to work with a smartcard. The subcommand "help" provides an overview on available commands.
Present a menu to allow changing the PIN of a smartcard. This functionality is also available as the subcommand "passwd" with the --edit-card command. Remove key from the public keyring. In batch mode either --yes is required or the key must be specified by fingerprint.
This is a safeguard against accidental deletion of multiple keys. If the exclamation mark syntax is used with the fingerprint of a subkey only that subkey is deleted; if the exclamation mark is used with the fingerprint of the primary key the entire public key is deleted. Remove key from the secret keyring. In batch mode the key must be specified by fingerprint. The option --yes can be used to advise gpg-agent not to request a confirmation.
If the exclamation mark syntax is used with the fingerprint of a subkey only the secret part of that subkey is deleted; if the exclamation mark is used with the fingerprint of the primary key only the secret part of the primary key is deleted. Same as --delete-key , but if a secret key exists, it will be removed first.
Either export all keys from all keyrings default keyring and those registered via option --keyring , or if at least one name is given, those of the given name. Use together with --armor to mail those keys. Similar to --export but sends the keys to a keyserver. Fingerprints may be used instead of key IDs. If no keyIDs are given, gpg does nothing.
Take care: Keyservers are by design write only systems and thus it is not possible to ever delete keys once they have been send to a keyserver.
Same as --export , but exports the secret keys instead. This command is often used along with the option --armor to allow for easy printing of the key for paper backup; however the external tool paperkey does a better job of creating backups on paper. Note that exporting a secret key can be a security risk if the exported keys are sent over an insecure channel.
The second form of the command has the special property to render the secret part of the primary key useless; this is a GNU extension to OpenPGP and other implementations can not be expected to successfully import such a key. Its intended use is in generating a full key with an additional signing subkey on a dedicated machine. This command then exports the key without the primary key to the main machine.
GnuPG may ask you to enter the passphrase for the key. This is required, because the internal protection method of the secret key is different from the one specified by the OpenPGP protocol. This command is used to export a key in the OpenSSH public key format. It requires the specification of one key by the usual means and exports the latest valid subkey which has an authentication capability to STDOUT or to the file given with option --output. By specifying the key to export using a key ID or a fingerprint suffixed with an exclamation mark!
This does not even require that the key has the authentication capability flag set. This adds the given keys to the keyring. The fast version is currently just a synonym. There are a few other options which control how this command works.
Most notable here is the --import-options merge-only option which does not insert new keys but does only the merging of new signatures, user-IDs and subkeys.
Request updates from a keyserver for keys that already exist on the local keyring. This is useful for updating a key with the latest signatures, user IDs, etc. Calling this with no arguments will refresh the entire keyring. Encryption provides confidentiality although signing binds the identity of the message source to this message.
It ensures data integrity, message authentication, and non-repudiation altogether. Message encryption makes the whole message unreadable to anyone but the owner of the corresponding private key. When you sign a message, then it creates a fingerprint for the message just to make sure that the content hasn't been altered, but it has no effect on the message itself and the message will never be encrypted. The fingerprint can be verified against a public key. This does not make a message unreadable to anyone but can verify that the message really originated from the sender and was not altered since.
Of course, this requires you to trust the public key. The security is assured by private and public keys. Any private key has one public key and any public key has one private key it is always one to one mapping. Establishing a secure communication means that you have already exchanged public keys with people or organization you trust in. So each party has their own private key and the other user's public key. In our scenario, there are two persons who want to communicate and they put their public keys on keyserver:.
So to write to reader linoxide. The sender of a message reader linoxide. This can prevent a third-party from "spoofing" the identity of someone.
0コメント