KeePass uses the Advanced Encryption Standard (AES) with 256-bit keys and the Twofish algorithm. Both are considered among the strongest encryption algorithms available and are used by governments and security experts worldwide.
All encryption and decryption happens locally on your device. Your passwords never leave your computer in unencrypted form. This means even if someone intercepts your database file, they cannot access your passwords without your master password.
Your master password is never stored anywhere. It's used to derive the encryption key, but the password itself is never saved. If you forget your master password, there is no way to recover your database - this is by design to ensure maximum security.
In addition to a master password, you can use a key file for additional security. This file acts as a second factor in the encryption process, making it even more difficult for unauthorized access.
Because KeePass is open source, security experts worldwide can review the code, identify vulnerabilities, and contribute fixes. This transparency ensures that any security issues are found and resolved quickly.