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中文摘要：
考虑到热点议题“抗选择性公开安全性”近年来一直局限在公钥加密方案（PKE）中很难应用于身份型加密方案的事实，该文结合广播加密模型，采用Waters等人新提出的“线性又随机”的技巧提出一个抗选择性公开攻击的身份型广播加密方案。该方案建立在标准模型下，具有尺寸固定的密文与密钥，同时无需使用随机标签，具有较高的计算效率与存储效率。该方案的安全性依赖于判定性线性假设，证明结果显示此方案达到了抗选择性公开安全性的高安全要求。
英文摘要：
According to the fact that security against Selective-Opening Attack （SOA） is confined to the case of Public-Key Encryption （PKE） but is difficult to yield solutions in Identity Based Encryption （IBE） in resent years, a novel identity-based broadcast encryption scheme against selective opening attack is proposed by combining with Waters et aI.＂linear or random＂ techniques and the broadcast encryption model. Based on the standard model without tags, the scheme can achieve constant-size keys and ciphertexts. Furthermore, the scheme＇s security is reduced to the decisional linear assumption. The analysis results indicate that the scheme of this paper is selective opening attack secure and can satisfy the higher efficiency and practice requirement.
同期刊论文项目
同项目期刊论文
Adaptively secure identity-based broadcast encryption with constant size private keys and ciphertext
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