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I'm using the OpenWrt Linux distribution and I want to encrypt a file using AES.
How can I do that quickly and easily, and how can I—or someone else—decrypt it again?
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You do not need to be an expert to use AES Crypt for Linux to securely encrypt your data files. To encrypt a file, you simply enter the "aescrypt" command with the appropriate command-line arguments. That's it! The program will create a file with the name "picture.
In order to decrypt an encrypted file on Linux, you have to use the “gpg” command with the “-d” option for “decrypt” and specify the “. gpg” file that you want to decrypt. Again, you will be probably be prompted with a window (or directly in the terminal) for the passphrase.
AES includes three block ciphers: AES-128 uses a 128-bit key length to encrypt and decrypt a block of messages. AES-192 uses a 192-bit key length to encrypt and decrypt a block of messages. AES-256 uses a 256-bit key length to encrypt and decrypt a block of messages.
The quickest and easiest way is to use openssl util (provided by openssl-util package). For example, to encrypt a file, issue the following command:
openssl enc -aes-256-cbc -in file.txt -out file.enc
To decrypt:
openssl enc -d -aes-256-cbc -in file.enc -out file.dec
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