A new signature scheme based on the DSA giving message recovery
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
Rethinking Public Key Infrastructures and Digital Certificates: Building in Privacy
Rethinking Public Key Infrastructures and Digital Certificates: Building in Privacy
Identity-Based Encryption from the Weil Pairing
SIAM Journal on Computing
CRYPTO '98 Proceedings of the 18th Annual International Cryptology Conference on Advances in Cryptology
Short Signatures from the Weil Pairing
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
An Identity Based Encryption Scheme Based on Quadratic Residues
Proceedings of the 8th IMA International Conference on Cryptography and Coding
Secret Handshakes from Pairing-Based Key Agreements
SP '03 Proceedings of the 2003 IEEE Symposium on Security and Privacy
Oblivious signature-based envelope
Proceedings of the twenty-second annual symposium on Principles of distributed computing
Concealing complex policies with hidden credentials
Proceedings of the 11th ACM conference on Computer and communications security
k-anonymous secret handshakes with reusable credentials
Proceedings of the 11th ACM conference on Computer and communications security
Security proofs for signature schemes
EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Optimistic fair exchange of digital signatures
IEEE Journal on Selected Areas in Communications
Privacy-Preserving Policy-Based Information Transfer
PETS '09 Proceedings of the 9th International Symposium on Privacy Enhancing Technologies
Secret interest groups (SIGs) in social networks with an implementation on Facebook
Proceedings of the 2010 ACM Symposium on Applied Computing
New construction of group secret handshakes based on pairings
ICICS'07 Proceedings of the 9th international conference on Information and communications security
Secret handshakes with revocation support
ICISC'09 Proceedings of the 12th international conference on Information security and cryptology
Attribute-based authentication for multi-agent systems with dynamic groups
Computer Communications
Authentication for paranoids: multi-party secret handshakes
ACNS'06 Proceedings of the 4th international conference on Applied Cryptography and Network Security
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In this paper, we investigate an interesting and practical cryptographic construct – Oblivious Signature-Based Envelopes (OSBEs) – recently introduced in [15]. OSBEs allow a sender to communicate information to a receiver such that the latter's rights (or roles) are unknown to the former. At the same time, a receiver can obtain the information only if it is authorized to access it. This makes OSBEs a natural fit for anonymity-oriented and privacy-preserving applications. Previous results yielded three OSBE constructs: one based on RSA and two based on Identity-Based Encryption (IBE). Our work focuses on the ElGamal signature family: we succeed in constructing practical and secure OSBE schemes for several well-known signature schemes, including: Schnorr, Nyberg-Rueppel, ElGamal and DSA. As illustrated by experiments with a prototype implementation, our schemes are more efficient than previous techniques. Furthermore, we show that some OSBE schemes, despite offering affiliation privacy for the receiver, result in no additional cost over schemes that do not offer this feature.