one-time password, One-Time Password
A "one-time password" is a simple authentication technique in which each password is used only once as authentication information that verifies an identity. This technique counters the threat of a replay attack that uses passwords captured by wiretapping.
Senses
1 (I) /not capitalized/
A "one-time password" is a simple authentication technique in which each password is used only once as authentication information that verifies an identity. This technique counters the threat of a replay attack that uses passwords captured by wiretapping.
- IETF RFC 4949 (Internet Security Glossary)Jan 06, 2026RFC 4949 — Internet Security Glossary (Version 2)https://www.rfc-editor.org/rfc/rfc4949.txtRFC 4949 is published by the IETF Trust and marked as "Distribution of this memo is unlimited". Verify IETF Trust copyright/licensing terms for reuse.Source: IETF RFC 4949 (rfc-editor.org).
2 (I) /capitalized/
"One-Time Password" is an Internet protocol [R2289] that is based on S/KEY and uses a cryptographic hash function to generate one-time passwords for use as authentication information in system login and in other processes that need protection against replay attacks.
- IETF RFC 4949 (Internet Security Glossary)Jan 06, 2026RFC 4949 — Internet Security Glossary (Version 2)https://www.rfc-editor.org/rfc/rfc4949.txtRFC 4949 is published by the IETF Trust and marked as "Distribution of this memo is unlimited". Verify IETF Trust copyright/licensing terms for reuse.Source: IETF RFC 4949 (rfc-editor.org).