Provably Secure Timed-Release Public Key Encryption
ACM Transactions on Information and System Security (TISSEC)
General Certificateless Encryption and Timed-Release Encryption
SCN '08 Proceedings of the 6th international conference on Security and Cryptography for Networks
Timed-Release Encryption Revisited
ProvSec '08 Proceedings of the 2nd International Conference on Provable Security
Anonymous Fingerprinting for Predelivery of Contents
Information Security and Cryptology --- ICISC 2008
A Generic Construction of Timed-Release Encryption with Pre-open Capability
IWSEC '09 Proceedings of the 4th International Workshop on Security: Advances in Information and Computer Security
FC'07/USEC'07 Proceedings of the 11th International Conference on Financial cryptography and 1st International conference on Usable Security
Combating spam and denial-of-service attacks with trusted puzzle solvers
ISPEC'08 Proceedings of the 4th international conference on Information security practice and experience
SCN'10 Proceedings of the 7th international conference on Security and cryptography for networks
Conditional e-payments with transferability
Journal of Parallel and Distributed Computing
Efficient generic constructions of timed-release encryption with pre-open capability
Pairing'10 Proceedings of the 4th international conference on Pairing-based cryptography
Generic construction of strongly secure timed-release public-key encryption
ACISP'11 Proceedings of the 16th Australasian conference on Information security and privacy
Improved merkle cryptosystem (IMC)
ISCIS'06 Proceedings of the 21st international conference on Computer and Information Sciences
Timed encryption with application to deniable key exchange
TAMC'12 Proceedings of the 9th Annual international conference on Theory and Applications of Models of Computation
Strong security notions for timed-release public-key encryption revisited
ICISC'11 Proceedings of the 14th international conference on Information Security and Cryptology
Improved anonymous timed-release encryption
ESORICS'07 Proceedings of the 12th European conference on Research in Computer Security
Practical time capsule signatures in the standard model from bilinear maps
Pairing'07 Proceedings of the First international conference on Pairing-Based Cryptography
Time capsule signature: efficient and provably secure constructions
EuroPKI'07 Proceedings of the 4th European conference on Public Key Infrastructure: theory and practice
Revisiting the security model for timed-release encryption with pre-open capability
ISC'07 Proceedings of the 10th international conference on Information Security
Token-controlled public key encryption in the standard model
ISC'07 Proceedings of the 10th international conference on Information Security
Time-Specific encryption from forward-secure encryption
SCN'12 Proceedings of the 8th international conference on Security and Cryptography for Networks
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We consider the problem of sending messages into the future, commonly known as timed release cryptography. Existing schemes for this task either solve the relative time problem with uncontrollable, coarse-grained release time (time-lock puzzle approach) or do not provide anonymity to senders and/or receivers and are not scalable (server-based approach). Using a bilinear pairing on any Gap Diffie-Hellman group, we solve this problem by giving scalable, server-passive and user-anonymous timed release public-key encryption schemes allowing precise absolute release time specifications. Unlike the existing server-based schemes, the trusted time server in our scheme is completely passive 驴 no interaction between it and the sender or receiver is needed; it is even not aware of the existence of a user, thus assuring the privacy of a message and the anonymity of both its sender and receiver. Besides, our scheme also has a number of desirable properties including a single form of update for all users, self-authenticated time-bound key updates, and key insulation, making it a scalable and appealing solution. It could also be easily generalized to a more general policy lock mechanism.