// TOOLS

Security Tools

🔑 SSH Key Analyzer

Paste an SSH public key to analyse it: type, bit length, comment, fingerprint and whether it is secure. Also generates ready-to-copy ssh-keygen commands.

Generate the optimal ssh-keygen command for each use case. All commands can be copied directly on Kali/Ubuntu/macOS.

⭐ ED25519 (recomendado) Most secure and fastest. 256-bit key equivalent to RSA 3072. Supported since OpenSSH 6.5. 
ssh-keygen -t ed25519 -C 'user@host' -f ~/.ssh/id_ed25519
🔒 RSA 4096 Maximum compatibility. Use when server does not support ED25519. 
ssh-keygen -t rsa -b 4096 -C 'user@host' -f ~/.ssh/id_rsa
🔐 ECDSA P-256 Good alternative to ED25519. Supported on more legacy platforms. 
ssh-keygen -t ecdsa -b 256 -C 'user@host' -f ~/.ssh/id_ecdsa
🔒⭐ ED25519 con passphrase Same as ED25519 but with passphrase. Maximum security for personal use. 
ssh-keygen -t ed25519 -C 'user@host' -f ~/.ssh/id_ed25519
# Te pedirá passphrase durante la generación
⚙️ Clave para CI/CD (sin passphrase) For automated pipelines. Store private key in CI/CD secrets. 
ssh-keygen -t ed25519 -C 'ci-deploy@pipeline' -f ~/.ssh/deploy_key -N ''
🖥️ Clave de servidor (host key) To regenerate SSH server host keys. 
# ED25519 host key:
ssh-keygen -t ed25519 -f /etc/ssh/ssh_host_ed25519_key -N ''
# RSA host key:
ssh-keygen -t rsa -b 4096 -f /etc/ssh/ssh_host_rsa_key -N ''

Enter the SSH server to audit and generate commands to check its configuration and detect weaknesses.