Encryption

• Age
• GPG

Age

Simple file encryption software that's unix only.

Generating key file with password protection

age-keygen | age -p > key.age

Basic key info

# created: 2023-03-28T22:22:05+02:00
# public key: pub key
SECRET-KEY

Encryption with key

age -r PUBLIC-KEY **file-name** > **output-file**

Decryption with key

Enter password if keyfile encrypted with one

age -d -i **path/to/key** **file-name** > **output-file**

Tared file

tar -cv directory | age r PUBLIC-KEY > **output-file**

GPG

How to use gpg for encryptions

Creation of keys

gpg --full-generate-key

Update expiration date

gpg --edit-key **email**
ls
key 0
expire
save

Changing the password

gpg --passwd **email**

Revoke/expire the key

# Generate your revoke certificate
gpg --output revoke.asc --gen-revoke key-ID
# Import the keys
gpg --import revoke.asc
# Search your key on the key-server
gpg --keyserver pgp.mit.edu --search-keys key-ID
# Send the revoked key to the key-server
gpg --keyserver pgp.mit.edu --send-keys key-ID

Backup private key

To backup

gpg -o private.gpg --export-options backup --export-secret-keys **email**

To import

# Import the key
gpg --import-options restore --import private.gpg
# Edit the key
gpg --edit-key  **email**
# Choose 5 to completely trust the key
trust