S-Keys are a type of one-time password (OTP) authentication mechanism that uses a challenge-response algorithm to verify the identity of a user. They are designed to provide an additional layer of security to traditional password-based authentication systems.
Skeys offer a biologically and environmentally entangled alternative to static secrets, making authentication inseparable from the user’s lived moment. While not a drop‑in replacement for all systems, they excel in high‑risk, continuous authentication contexts (financial trading floors, military command posts, medical device access). Future work includes adversarial training for sensor‑fusion models and hardware‑rooted Skey generation using TEEs. S-Keys are a type of one-time password (OTP)
Properties:
[ S(t) = F( B(t), E(t), I(t) ) ] where: