Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
Random oracles are practical: a paradigm for designing efficient protocols
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
Entity authentication and key distribution
CRYPTO '93 Proceedings of the 13th annual international cryptology conference on Advances in cryptology
Identity-Based Encryption from the Weil Pairing
SIAM Journal on Computing
Analysis of Key-Exchange Protocols and Their Use for Building Secure Channels
EUROCRYPT '01 Proceedings of the International Conference on the Theory and Application of Cryptographic Techniques: Advances in Cryptology
Secret Handshakes from Pairing-Based Key Agreements
SP '03 Proceedings of the 2003 IEEE Symposium on Security and Privacy
k-anonymous secret handshakes with reusable credentials
Proceedings of the 11th ACM conference on Computer and communications security
Advances in Elliptic Curve Cryptography (London Mathematical Society Lecture Note Series)
Advances in Elliptic Curve Cryptography (London Mathematical Society Lecture Note Series)
Unlinkable Secret Handshakes and Key-Private Group Key Management Schemes
ACNS '07 Proceedings of the 5th international conference on Applied Cryptography and Network Security
ICALP '08 Proceedings of the 35th international colloquium on Automata, Languages and Programming, Part II
Secret Handshake: Strong Anonymity Definition and Construction
ISPEC '09 Proceedings of the 5th International Conference on Information Security Practice and Experience
Private Mutual Authentication and Conditional Oblivious Transfer
CRYPTO '09 Proceedings of the 29th Annual International Cryptology Conference on Advances in Cryptology
Provably secure non-interactive key distribution based on pairings
Discrete Applied Mathematics - Special issue: Coding and cryptography
Beyond secret handshakes: affiliation-hiding authenticated key exchange
CT-RSA'08 Proceedings of the 2008 The Cryptopgraphers' Track at the RSA conference on Topics in cryptology
Taming big brother ambitions: more privacy for secret handshakes
PETS'10 Proceedings of the 10th international conference on Privacy enhancing technologies
LATINCRYPT'10 Proceedings of the First international conference on Progress in cryptology: cryptology and information security in Latin America
Affiliation-hiding key exchange with untrusted group authorities
ACNS'10 Proceedings of the 8th international conference on Applied cryptography and network security
Privacy-preserving group discovery with linear complexity
ACNS'10 Proceedings of the 8th international conference on Applied cryptography and network security
Practical affiliation-hiding authentication from improved polynomial interpolation
Proceedings of the 6th ACM Symposium on Information, Computer and Communications Security
WCC'05 Proceedings of the 2005 international conference on Coding and Cryptography
CT-RSA'05 Proceedings of the 2005 international conference on Topics in Cryptology
A flexible framework for secret handshakes
PET'06 Proceedings of the 6th international conference on Privacy Enhancing Technologies
Authentication for paranoids: multi-party secret handshakes
ACNS'06 Proceedings of the 4th international conference on Applied Cryptography and Network Security
Group secret handshakes or affiliation-hiding authenticated group key agreement
CT-RSA'07 Proceedings of the 7th Cryptographers' track at the RSA conference on Topics in Cryptology
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Affiliation-Hiding Authentication (AHA) protocols have the seemingly contradictory property of enabling users to authenticate each other as members of certain groups, without revealing their affiliation to group outsiders. Of particular interest in practice is the group-discovering variant, which handles multiple group memberships per user. Corresponding solutions were only recently introduced, and have two major drawbacks: high bandwidth consumption (typically several kilobits per user and affiliation), and only moderate performance in scenarios of practical application. While prior protocols have O(n2) time complexity, where n denotes the number of affiliations per user, we introduce a new AHA protocol running in O(n log n) time. In addition, the bandwidth consumed is considerably reduced. We consider these advances a major step towards deployment of privacy-preserving methods in constraint devices, like mobile phones, to which the economization of these resources is priceless.