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| Ring-Signatur× | HMAC× | |
|---|---|---|
| Fachgebiet | Kryptographie | Kryptographie |
| Familie | Machine learning | Machine learning |
| Entstehungsjahr≠ | 2001 | 1997 |
| Urheber≠ | Ronald Rivest | Hugo Krawczyk |
| Typ≠ | signature scheme with anonymity | cryptographic authentication mechanism |
| Wegweisende Quelle≠ | Rivest, R. L., Shamir, A., & Tauman, Y. (2001). How to leak a secret. In Advances in Cryptology - ASIACRYPT 2001, LNCS 2248, pp. 552-565. DOI ↗ | Krawczyk, H., Bellare, M., & Crechanko, R. (1997). HMAC: Keyed-Hashing for Message Authentication. RFC 2104. link ↗ |
| Aliasnamen | ring signature, group signature | HMAC, keyed hash function |
| Verwandt | 3 | 3 |
| Zusammenfassung≠ | A ring signature is a digital signature scheme allowing a member of a group (ring) to sign a message on behalf of the group without revealing the signer's identity. Proposed by Rivest, Shamir, and Tauman in 2001, ring signatures provide signer anonymity while still proving that the signature comes from one member of a specified set. This cryptographic primitive is widely used in privacy-preserving applications, whistleblowing systems, and anonymous messaging platforms. | HMAC (Hash-Based Message Authentication Code) is a cryptographic algorithm for authenticating messages using a secret key and a hash function. Standardized in RFC 2104 (1997), HMAC can be combined with any cryptographic hash function (SHA-256, SHA-3, etc.) to create a message authentication code (MAC). HMAC provides both data integrity and authentication, detecting both accidental corruption and deliberate tampering, and is widely used in web security (TLS/SSL), API authentication, and network protocols. |
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