security (OTP) A security system that requires a new
password every time a user authenticates themselves. OTP
generates these passwords using either the
MD4 or
MD5The equivalent term "S/Key" is a trademark of
TelcordiaTechnologies, so the name OTP is used increasingly.
See
RFC 1760 - "The S/KEY One-Time Password System" and
RFC1938 - "A One-Time Password System".
(2000-01-31)