Gpg which cipher

Each time you use a symmetric cipher to encrypt data, you'll be asked to supply a passphrase twice to confirm it. This passphrase is used to help generate a key which is then used with the chosen algorithm to encrypt the data.

It goes without saying but we'll say it anyway that you should use a strong passphrase and don't forget what you chose!. When you get around to decrypting the data, you'll be prompted for that passphrase. Note that to tell the gpg command that you want to use symmetric-key encryption, use the --symmetric or -c option. We'll be using --symmetric in each of the examples below. If you're not sure which cipher to use, AES is the safe choice as it's recommended by the US Government and the most commonly used note that this does not necessarily mean it is the strongest and fastest in all cases.

AES has a block size of bits. The in the name is in relation to the key size of AES, which is of course bits 32 bytes. For example to encrypt a file called file. This will produce file. You can call the resulting file whatever you like by using the -o or --output option. Safe means, one that must be or should be implemented.

Which one this is depends on the version of GnuPG and compatibility level chosen. You can easily verify this by starting a symmetric encryption, passing one of the compatibility levels or none, which implies --gnupg :. GnuPG 2. For digest algorithms, similar algorithm preference inference is performed.

If --verbose is set as an option, the used algorithm is printed. The defaults must have changed. Checking File Integrity. Shift Transfer Tool Overview. Running Jobs with PBS. Post-Processing Data. Systems Reference. Security and Policies.

Cloud Computing. Machine Learning. NAS Data Portal. Article ID: Examples If you choose not to add the cipher-algo AES to your gpg. Creating an Encrypted File Both commands below are identical.