基于椭圆曲线离散对数问题，纪家慧和李大兴提出了一个代理签名方案和一个代理多签名方案，陈泽雄等人给出了另外两个代理多签名方案。
Based on the elliptic curve discrete logarithm problem, Ji and Li proposed a proxy signature scheme and a proxy multi-signature scheme and Chen et al. proposed two proxy multi-signature schemes.
第二天，她收到一条信息，告知她对手是前任老师藤泽和雄。
The next day, she receives a message that her enemy is her former teacher, Fujisawa Kazuo.
第二天，她收到一条信息，告知她对手是前任老师藤泽和雄。
The next day, she receives a message that her enemy is her former teacher, Fujisawa Kazuo.
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