Paper 2015/248
Verifiably Encrypted Signatures with Short Keys based on the Decisional Linear Problem and Obfuscation for Encrypted VES
Ryo Nishimaki and Keita Xagawa
Abstract
Verifiably encrypted signatures (VES) are signatures encrypted by a public key of a trusted third party and we can verify their validity without decryption. This paper proposes a new VES scheme which is secure under the decisional linear (DLIN) assumption in the standard model. We also propose new obfuscators for encrypted signatures (ES) and encrypted VES (EVES) which are secure under the DLIN assumption.
All previous efficient VES schemes in the standard model are either secure under standard assumptions (such as the computational Diffie-Hellman assumption) with large verification (or secret) keys or secure under \emph{(non-standard) dynamic
Note: This is the IACR version.
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Published by the IACR in PKC 2013
- Keywords
- verifiably encrypted signatureobfuscationencrypted verifi- ably encrypted signaturedecisional linear assumption
- Contact author(s)
- nishimaki ryo @ lab ntt co jp
- History
- 2015-03-19: received
- Short URL
- https://ia.cr/2015/248
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2015/248, author = {Ryo Nishimaki and Keita Xagawa}, title = {Verifiably Encrypted Signatures with Short Keys based on the Decisional Linear Problem and Obfuscation for Encrypted {VES}}, howpublished = {Cryptology {ePrint} Archive, Paper 2015/248}, year = {2015}, url = {https://eprint.iacr.org/2015/248} }