Term · 13. Cryptography & Signatures
Electronic Signature
Definition
An electronic signature is electronic data that is logically associated with other electronic data and used by a signatory to indicate approval or intention, including but not limited to cryptographic methods. In many legal and technical frameworks it serves as the electronic analogue of a handwritten signature, providing evidence of the signer’s identity and intent, and often supporting integrity and non‑repudiation depending on the implementation. The term is broader than digital signature and may encompass a range of technical mechanisms and assurance levels.
Related terms
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Access Token (AT)
Access token (AT) is an OAuth or similar authorization artifact that represents the client’s delegated access rights to …
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DPoP (Demonstration of Proof of Possession) (DPoP)
Demonstration of Proof-of-Possession — IETF RFC 9449, OAuth 2.0 mechanism binding an access token to a private key held …
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FAPI 2.0 (Financial-grade API) (FAPI 2.0)
OpenID Foundation Financial-grade API Security Profile 2.0 — high-security authorization profile for financial APIs (ope …
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Kerberos
Network authentication protocol developed at MIT (Kerberos v5: IETF RFC 4120, 2005) using symmetric-key cryptography and …
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mTLS (mutual TLS) (mTLS)
Mutual TLS — both client and server authenticate each other via certificates during TLS handshake. RFC 8705 specifies OA …
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OAuth 2.1 (OAuth 2.1)
IETF draft consolidating OAuth 2.0 (RFC 6749) with security best practices and deprecating insecure patterns: removes im …