Abstract
Timed-Release Encryption (TRE) (proposed by May in 1993) prevents even a legitimate recipient decrypting a ciphertext before a semi-trusted Time Server (TS) sends trapdoor s T assigned with a release time T of the encryptor’s choice. Cathalo et al. (ICICS2005) and Chalkias et al. (ESORICS2007) have already considered encrypting a message intended to multiple recipients with the same release time. These schemes are efficient compared with previous TRE schemes with recipient-to-recipient encryption, since the most costly part (especially pairing computation) has only to be computed once, and this element is used commonly. One drawback of these schemes is the ciphertext size and computational complexity, which depend on the number of recipients N. In this paper, for the first time we propose Timed-Release Proxy Re-Encryption (TR-PRE) scheme. As in PRE, a semi-trusted proxy transforms a ciphertext under a particular public key (this can be regarded as a mailing list) into re-encrypted ciphertexts under each recipient (who can be regarded as mailing list members). Even if the proxy transformation is applied to a TRE ciphertext, the release time is still effective. An encryptor can transfer N-dependent computation parts to the proxy. This function can be applied to multicast communication with a release time indication. For example, in an on-line examination, an examiner sends encrypted e-mails to each examinee, and each examination can be fairly opened at the same time. Our TR-PRE scheme is provably secure under both chosen-time period chosen-ciphertext attack (IND-CTCA) and replayable chosen-ciphertext attack (IND-RCCA) without random oracles.
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References
Ateniese, G., Fu, K., Green, M., Hohenberger, S.: Improved proxy re-encryption schemes with applications to secure distributed storage. ACM Trans. Inf. Syst. Secur. 9(1), 1–30 (2006)
Bellare, M., Shoup, S.: Two-tier signatures, strongly unforgeable signatures, and fiat-shamir without random oracles. In: Public Key Cryptography, pp. 201–216 (2007)
Bethencourt, J., Sahai, A., Waters, B.: Ciphertext-policy attribute-based encryption. In: IEEE Symposium on Security and Privacy, pp. 321–334 (2007)
Blaze, M., Bleumer, G., Strauss, M.: Divertible protocols and atomic proxy cryptography. In: Nyberg, K. (ed.) EUROCRYPT 1998. LNCS, vol. 1403, pp. 127–144. Springer, Heidelberg (1998)
Bobba, R., Muggli, J., Pant, M., Basney, J., Khurana, H.: Usable secure mailing lists with untrusted servers. In: IDtrust, pp. 103–116 (2009)
Boneh, D., Boyen, X.: Efficient selective-ID secure identity-based encryption without random oracles. In: Cachin, C., Camenisch, J.L. (eds.) EUROCRYPT 2004. LNCS, vol. 3027, pp. 223–238. Springer, Heidelberg (2004)
Boneh, D., Boyen, X.: Short signatures without random oracles and the SDH assumption in bilinear groups. J. Cryptology 21(2), 149–177 (2008)
Canetti, R., Halevi, S., Katz, J.: Chosen-ciphertext security from identity-based encryption. In: Cachin, C., Camenisch, J.L. (eds.) EUROCRYPT 2004. LNCS, vol. 3027, pp. 207–222. Springer, Heidelberg (2004)
Canetti, R., Hohenberger, S.: Chosen-ciphertext secure proxy re-encryption. In: ACM Conference on Computer and Communications Security, pp. 185–194 (2007)
Cathalo, J., Libert, B., Quisquater, J.-J.: Efficient and non-interactive timed-release encryption. In: Qing, S., Mao, W., López, J., Wang, G. (eds.) ICICS 2005. LNCS, vol. 3783, pp. 291–303. Springer, Heidelberg (2005)
Chalkias, K., Hristu-Varsakelis, D., Stephanides, G.: Improved anonymous timed-release encryption. In: Biskup, J., López, J. (eds.) ESORICS 2007. LNCS, vol. 4734, pp. 311–326. Springer, Heidelberg (2007)
Cheon, J.H., Hopper, N., Kim, Y., Osipkov, I.: Timed-release and key-insulated public key encryption. In: Di Crescenzo, G., Rubin, A. (eds.) FC 2006. LNCS, vol. 4107, pp. 191–205. Springer, Heidelberg (2006)
Cheon, J.H., Hopper, N., Kim, Y., Osipkov, I.: Provably secure timed-release public key encryption. ACM Trans. Inf. Syst. Secur. 11(2) (2008)
Chow, S.S.M., Roth, V., Rieffel, E.G.: General certificateless encryption and timed-release encryption. In: SCN, pp. 126–143 (2008)
Chow, S.S.M., Yiu, S.-M.: Timed-release encryption revisited. In: Baek, J., Bao, F., Chen, K., Lai, X. (eds.) ProvSec 2008. LNCS, vol. 5324, pp. 38–51. Springer, Heidelberg (2008)
Dent, A.W., Tang, Q.: Revisiting the security model for timed-release encryption with pre-open capability. In: ISC, pp. 158–174 (2007)
Dodis, Y., Yampolskiy, A.: A verifiable random function with short proofs and keys. In: Vaudenay, S. (ed.) PKC 2005. LNCS, vol. 3386, pp. 416–431. Springer, Heidelberg (2005)
Fujisaki, E., Okamoto, T.: Secure integration of asymmetric and symmetric encryption schemes. In: Wiener, M. (ed.) CRYPTO 1999. LNCS, vol. 1666, pp. 537–554. Springer, Heidelberg (1999)
Gentry, C.: Practical identity-based encryption without random oracles. In: Vaudenay, S. (ed.) EUROCRYPT 2006. LNCS, vol. 4004, pp. 445–464. Springer, Heidelberg (2006)
Goyal, V., Pandey, O., Sahai, A., Waters, B.: Attribute-based encryption for fine-grained access control of encrypted data. In: ACM Conference on Computer and Communications Security, pp. 89–98 (2006)
Hwang, Y.H., Yum, D.H., Lee, P.J.: Timed-release encryption with pre-open capability and its application to certified e-mail system. In: Zhou, J., López, J., Deng, R.H., Bao, F. (eds.) ISC 2005. LNCS, vol. 3650, pp. 344–358. Springer, Heidelberg (2005)
Khurana, H., Hahm, H.-S.: Certified mailing lists. In: ASIACCS, pp. 46–58 (2006)
Khurana, H., Heo, J., Pant, M.: From proxy encryption primitives to a deployable secure-mailing-list solution. In: Ning, P., Qing, S., Li, N. (eds.) ICICS 2006. LNCS, vol. 4307, pp. 260–281. Springer, Heidelberg (2006)
Khurana, H., Slagell, A.J., Bonilla, R.: SELS: a secure e-mail list service. In: SAC 2005, pp. 306–313 (2005)
Libert, B., Vergnaud, D.: Unidirectional chosen-ciphertext secure proxy re-encryption. In: Cramer, R. (ed.) PKC 2008. LNCS, vol. 4939, pp. 360–379. Springer, Heidelberg (2008)
May, T.C.: Time-release crypto. Unpublished manuscript (1993)
Mizuno, T., Doi, H.: Hybrid proxy re-encryption scheme for attribute-based encryption. In: INSCRYPT, pp. 385–399 (2009)
Nakai, Y., Matsuda, T., Kitada, W., Matsuura, K.: A generic construction of timed-release encryption with pre-open capability. In: Takagi, T., Echizen, I. (eds.) IWSEC 2009. LNCS, vol. 5824, pp. 53–70. Springer, Heidelberg (2009)
Teranishi, I., Oyama, T., Ogata, W.: General conversion for obtaining strongly existentially unforgeable signatures. IEICE Transactions 91-A(1), 94–106 (2008)
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Emura, K., Miyaji, A., Omote, K. (2010). A Timed-Release Proxy Re-encryption Scheme and Its Application to Fairly-Opened Multicast Communication. In: Heng, SH., Kurosawa, K. (eds) Provable Security. ProvSec 2010. Lecture Notes in Computer Science, vol 6402. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-16280-0_14
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DOI: https://doi.org/10.1007/978-3-642-16280-0_14
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