在标准模型下面, IND-sID-CPA 安全 IBE (身份基于加密)计划被建议,它在戒指和 decisional R-LWE 上基于改进地板门产生功能(与错误学习戒指)假设,因此,恢复系统主人钥匙的坚硬能被减少解决 Ideal-SIS (小整数答案)到密文的问题,和攻击等价于在理想的格子上在最糟的盒子中解决 SVP (最短的向量问题)到在内一 poly 修理了(n) fa 而且,建议计划在标准模型下面从标准格子与所有已知的 IBE 计划相比有高加密和解密速度和低加密发作因素的优点。
Under the standard model, an IND-slD-CPA secure IBE (Identity Based Encryption) scheme is proposed, which is based on an improved trapdoor generation function over ring and decisional R-LWE (ring-learning with errors) assumption, thus the hardness of recovering system master key can be reduced to solve the Ideal-SIS (small integer solution) problem, and the attack to the ciphertext is equivalent to solving the SVP (the shortest vector problem) in the worst case on ideal lattice to within a fixed poly(n) factor. Moreover, the proposed scheme has advantages of high encrypfion and decryption speed and low encryption blowup factor compared with all known IBE scheme from the standard lattice under the standard model.