What is single-encryption-key authentication?
It is a cryptographic authentication mechanism that generates a unique, non-reusable key per session and device. It replaces OTP codes and traditional two-factor systems, eliminating phishing and credential-theft attacks.
How it works
Instead of relying on something the user knows (a password) or receives (an SMS or code), the single encryption key is generated cryptographically between the authorised device and the gateway. Each session uses a fresh key, derived on the fly and valid only for that connection. There is no reusable shared secret an attacker can steal.
Advantages over passwords and codes
- Anti-phishing by design: there is no credential the user could enter on a fake site.
- No SIM swapping: no codes are sent over SMS.
- Automatic rotation: each session uses a different key.
- Device binding: the key is only valid from the authorised device.
- Transparent UX: the user does not type anything in.
Role in a Zero Trust architecture
Zero Trust requires verifying identity and device on every access. The single encryption key is the component that makes that verification tamper-proof: even if an attacker obtains the user's credentials, without the authorised device they cannot generate the key needed to start a session.