Passkeys represent a revolutionary shift in digital authentication, moving beyond traditional, vulnerable passwords to a more secure and user-friendly system. This modern method employs cryptographic keys, leveraging biometrics like Face ID, Touch ID, or fingerprint readers, or hardware security keys, to verify a user's identity. At its core, passkeys are built on public key cryptography, ensuring that no sensitive login secrets are ever stored by websites or applications. This design makes them inherently resistant to common threats such as phishing attacks, password reuse, and credential theft, which are significant causes of data breaches. The benefits of passkeys are extensive. Users no longer need to remember complex passwords, streamlining the login process to mere seconds through a simple biometric prompt. This not only enhances convenience but also drastically improves security, as passkeys cannot be guessed or easily stolen. The private key, crucial for authentication, remains securely stored on the user's device within a secure enclave, making it useless to hackers even if a company's database is compromised. Major tech giants like Google, Apple, and Microsoft are actively supporting and integrating passkeys, signaling a clear industry-wide move towards a password-free future. Passkeys also offer seamless cross-device functionality, often syncing securely via encrypted cloud accounts, and provide a robust replacement for traditional two-factor authentication, making digital interactions safer and more efficient for everyone, from everyday users to large enterprises.