Encrypting with GnuPG symmetric encryption | LinuC Level 1 102 Exam original practice question

1.10.3Basic

Encrypt secret information with GnuPG using symmetric encryption while keeping the input file and creating ciphertext.

Which command is appropriate?

Hint 1: Focus on the key relationship

Identify who must decrypt the data, then distinguish confidentiality, authentication, and the direction of each key operation.

Hint 2: Key terms

Review the short definitions of SSH keys, forwarding directions, encryption, and signatures involved.

--symmetric: The GnuPG operation for passphrase-based symmetric encryption.
--decrypt: The GnuPG operation that turns ciphertext back into plaintext.
--verify: The GnuPG operation that checks an electronic signature.
--export: The GnuPG operation that writes key data to an external form.
Passphrase: A secret character string used by symmetric encryption for protection and recovery.

Detailed explanation

Correctgpg --symmetric secret.txt

Correct. --symmetric encrypts the file with a passphrase.

Incorrectgpg --decrypt secret.txt

Incorrect. --decrypt performs decryption.

Incorrectgpg --export secret.txt

Incorrect. --export writes keys such as public keys; it does not encrypt a file.

Incorrectgpg --verify secret.txt

Incorrect. --verify checks a signature rather than encrypting data.

An example you can run in a temporary verification environment.

printf '%s\n' 'gpg --symmetric secret.txt'

gpg --symmetric secret.txt

Foundation review

A server identity key used by SSH clients to detect a changed endpoint.

A key pair used to authenticate a user to an SSH server.

An SSH tunnel that carries traffic between a local, remote, or dynamic endpoint.

Question IDKL-102-1160

EnvironmentGnuPGのコマンド役割確認

Last technical review2026-08-20

More practice in this area