Question about symmetric AES cipher in GnuPG

Stefan Claas sac at
Sun Oct 27 20:25:10 CET 2019

Hi Werner and all,

I was wondering why the binary file size when using symmetric AES
encryption with GnuPG is larger than with other apps, I have tested
so far.

As an example encrypting a text file containing 'Hello World':

gpg --symmetric --cipher-algo AES256 hw.txt gives me a file
size of 87 Bytes.

Doing the same with openssl, for example:

openssl enc -aes-256-cbc -pbkdf2 -in hw.txt -out hw.enc

results in 32 Bytes.

Can you please, or somebody else, explain in laymen terms why this is so?


box: 4a64758de9e8ceded2c481ee526440687fe2f3a828e3a813f87753ad30847b56
  certified OpenPGP key blocks available on

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