格上可撤銷的基于身份的適應(yīng)性安全的加密方案
doi: 10.11999/JEIT140421
基金項(xiàng)目:
國家自然科學(xué)基金(61173151, 61173152)資助課題
A Lattice-based Revocable Adaptive-ID Secure Encryption Scheme
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摘要: 用戶撤銷是基于身份的加密(IBE)方案在實(shí)際應(yīng)用中所必須解決的問題。Chen等人在ACISP 2012上給出了第1個(gè)格上可撤銷的基于身份的加密(RIBE)方案，但其只能達(dá)到選擇性安全。利用Agrawal等人在歐密2010上給出的IBE方案，該文構(gòu)造出一個(gè)格上適應(yīng)性安全的RIBE方案，從而解決了Chen等人提出的公開問題；進(jìn)一步指出利用Singh等人在SPACE 2012上給出的塊方法，可以有效地縮短該方案的公鑰尺寸。
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關(guān)鍵詞:
- 密碼學(xué) /
- 基于身份加密 /
- 用戶撤銷 /
- 格 /
- 適應(yīng)性身份安全
Abstract: User revocation is crucial to the practical application of Identity Based Encryption (IBE). The first Revocable Identity Based Encryption (RIBE) scheme from lattice is given by Chen et al. in ACISP 2012, but its security can only be proved in the selective-ID model. Using the IBE scheme suggested by Agrawal et al. in EUROCPYPT 2010, this paper constructs a lattice-based adaptive-ID secure RIBE scheme, so as to solve a problem left open by Chen et al.. This paper also points out that using the blocking technique given by Singh et al. in SPACE 2012, the public key size can be reduced effectively.-
Key words:
- Cryptography /
- Identity Based Encryption (IBE) /
- User revocation /
- Lattice /
- Adaptive-ID secure
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