SSH Security

ssh-keygen-pkcs8.sh

# Improving the security of your SSH private key files (
# Better key protection with PKCS#8
# http://martin.kleppmann.com/2013/05/24/improving-security-of-ssh-private-keys.html

mv ~/.ssh/id_rsa ~/.ssh/id_rsa.old
openssl pkcs8 -topk8 -v2 des3 -in ~/.ssh/id_rsa.old -out ~/.ssh/id_rsa
chmod 600 ~/.ssh/id_rsa
# Check that the converted key works; if yes, delete the old one:
rm ~/.ssh/id_rsa.old


# Changing a Passphrase with ssh-keygen

cd .ssh

# To change RSA passphrase, enter:

#ssh-keygen -f id_rsa -p

# To change DSA passphrase, enter:

#ssh-keygen -f id_dsa -p