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Secure and {\sl Practical} Identity-Based Encryption
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Abstract: | In this paper, we present a variant of Waters' Identity-Based Encryption scheme with a much smaller public-key size (only a few kilobytes). We show that this variant is semantically secure against passive adversaries in the standard model.\smallskip In essence, the new scheme divides Waters' public key size by a factor $\ell$ at the cost of (negligibly) reducing security by $\ell$ bits. Therefore, our construction settles an open question asked by Waters and constitutes the first fully secure {\sl practical} Identity-Based Encryption scheme. |
BibTeX
@misc{eprint-2005-12703, title={Secure and {\sl Practical} Identity-Based Encryption}, booktitle={IACR Eprint archive}, keywords={public-key cryptography / IBE, Waters, Identity}, url={http://eprint.iacr.org/2005/369}, note={ david.naccache@ens.fr 13071 received 15 Oct 2005}, author={David Naccache}, year=2005 }