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The first question is what kind of key algorithm you want.
Pgp command line for mac full#
Let's describe the options on the full generate option: $ gpg -full-generate-key The quick and full generate options can also be used in a batch mode as documented in the man page. The -full-generate-key option, demonstrated below, provides a dialog for all options.In addition to creating the key, it also stores a revocation certificate.
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The -generate-key option prompts for the real name and email fields before asking for a confirmation to proceed.It implements defaults for all other options. The -quick-generate-key option requires you to specify the USER-ID field on the command line and optionally an algorithm, usage, and expire date.The gpg command has three options for creating a key pair:
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Creating the key pair is similar to creating ssh keys in that you choose a key size, specify an identifier, and set a passphrase. To receive an encrypted file that only you can open, you first need to create a key pair and then share your public key.
Pgp command line for mac download#
Download RHEL 9 at no charge through the Red Hat Developer program.You can of course mitigate this risk somewhat by copying your private key to multiple devices, making regular backups of it, etc. The downside is that, if you lose your private key, your files are irrecoverably gone. This may come in handy if you plan on storing those files for a long time and have a hard time remembering passwords. The advantage of this approach is that you don't need to remember the key you used to encrypt the files. This random key is then encrypted with your public key and can be decrypted with your private key. This causes GnuPG to generate a random key for AES256, which may be more secure than a "rememberable" passphrase. You could also use asymmetric cryptography, and use your own public key as the recipient. The file can be decrypted simply by typing gpg -d It just helps you remember that the file is encrypted. gpg is not a standardized file extension or necessary. Don't forget the passphrase, as you will not have any option to recover your data without it. GnuPG will now ask you to enter and repeat a passphrase. If you are worried about modes, GnuPG uses their own variant of the CFB-mode, though this doesn't matter too much for this use case.Īfter you have picked a cipher, you can now begin encrypting your file: gpg -c -cipher-algo AES256 -o myPlaintextFile.mp3 You can now pick any of these ciphers, although AES256 is a safe choice. It'll look somewhat like this: Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH, Then you will see the version number of your GnuPG installation, as well as the symmetric ciphers supported by your installation. Of course, you can also use GnuPG to encrypt files symmetrically as well. GnuPG is designed primarily to work with asymmetric cryptography, which is why many of the options mention "recipients". The recipients public key is used to encrypt data, and the recipient uses their private key to decrypt. The very quick summary is that symmetric cryptography uses the same key for encryption and decryption, where asymmetric cryptography has a public key and a private key. By searching for "gnupg symmetric encryption", I found this guide, which lists the steps and required options step-by-step.