problem n. 1.问题,课题;疑难问题;令人困惑的情况。 2.【数、物】习题;作图题。 3.(象棋的)布局问题。 the problem of unemployment 失业问题。 His whole conduct is a problem to me. 他的一切行为我都不理解。 adj. 1.成问题的;难处理的。 2.关于社会问题的。 a problem child 【心理学】问题儿童;难管教的孩子。 a problem novel [play] (反映社会问题等的)问题小说[戏剧]。 sleep on [upon, over] a problem 把问题留到第二天解决。
Using the idea of secret-sharing and signature-of-knowledge, a new perfect and strong key-insulated signature scheme based on the assumption of integer factorization problem is proposed . the scheme has a low computation in key updating and signing, thus fitting for the mobile devices (6)对签名系统中的密钥泄露问题进行了研究,在分析相关技术的基础上,利用秘密分享和知识签名,给出了一个完善的强key-insulated签名方案。
The elliptic curve digital signature algorithm ( ecdsa ) is the elliptic curve analogue of the digital signature algorithm ( dsa ) . it was accepted in 1999 as an ansi standard, and was accepted in 2000 as ieee and nist standards . unlike the ordinary discrete logarithm problem and the integer factorization problem, no subexponential-time is known for the elliptic curve discrete logarithm problem . for this reason, the strength-per-key-bit is substantially greater in an algorithm that uses elliptic curves 椭圆曲线数字签名算法(ecdsa)是数字签名算法(dsa)的椭圆曲线对等。它先后成为ansi,ieee,nist和iso的标准,而且其它的一些组织正在考虑成为其标准。不象普通的离散对数问题和因数分解问题,椭圆曲线离散对数问题没有已知的亚指数算法,所以使用椭圆曲线的算法在密钥的位强度是足够高的。