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What is the strongest symmetric encryption algorithm?
AES
AES is the symmetric algorithm-of-choice for most applications today and is very widely used, mostly with 128 or 256-bit keys, with the latter key length even considered strong enough to protect military TOP SECRET data.
Is GPG symmetric encryption secure?
It’s a 128-bit cipher, which is computationally infeasible to brute force, and so all of the security depends on the security of your passphrase. GPG performs a technique known as “key stretching” (see the s2k options) to make it harder to brute force passphrases as well.
How to symmetric encrypt a file in GPG?
For example to encrypt a file called file.txt using this cipher, use: gpg –symmetric –cipher-algo AES256 file.txt This will produce file.txt.gpg containing the encrypted data. You can call the resulting file whatever you like by using the -o (or –output) option.
Which is the most robust algo for GPG symmetric encryption?
Closed 4 years ago. What is the most robust available algo for GPG symmetric encryption (given as argument of –cipher-algo )? Use AES-256 (because it stops people from lecturing you about quantum computers). If you don’t have particular (performance) requirements in mind, 256-bit AES is a good and safe choice.
How to encrypt a 256 bit file in GPG?
To encrypt data using 256 bit AES, use the –cipher-algo AES256 option. For example to encrypt a file called file.txt using this cipher, use: gpg –symmetric –cipher-algo AES256 file.txt. This will produce file.txt.gpg containing the encrypted data. You can call the resulting file whatever you like by using the -o (or –output) option.
Which is the default algorithm in GnuPG 2.1?
GnuPG 2.1 uses the same algorithms for the RFC-compliant settings. For digest algorithms, similar algorithm preference inference is performed. If –verbose is set as an option, the used algorithm is printed. An exception is the Modification Detection Code Packet, which only allows SHA-1 with no algorithm choice as defined by the standard.