学术活动
信科院:Non-uniform security: limits on the power of pre-computation

报告题目:Non-uniform security: limits on the power of pre-computation

报告时间:2019年5月6日星期一,下午3:00-4:30

报告地点:信息太阳集团官方网站与工程学院106报告厅

讲者:郭斯瑶(上海纽约大学计算机系)

郭斯瑶是来上海纽约大学计算机系的助理教授。加入上海纽约大学前,她在纽约大学,加州大学伯克利分校和东北大学担任过博士后研究员,并在香港中文大学取得博士学位。她的研究兴趣是理论计算机,尤其是计算复杂度,密码学和伪随机理论方向。

报告摘要:

Cryptographic hash functions are widely used in practice for a variety of applications, including password hashing, digital signatures, bitcoin and more. The fact that hash functions are public allows attackers to perform pre-computation before attacking the system. However, the traditional security bounds for the above applications either do not apply at all, or do not give accurate security bounds when pre-computation is allowed.

In this talk, we focus on non-uniform attackers, which can obtain arbitrary (but bounded-length) pre-computed advice about the hash function before attacking the system. We introduce optimal and generic tools for analyzing the non-uniform security of hash-function-based applications. Furthermore, we give simple compilers that transform any secure scheme (in the traditional sense) into one that is secure against non-uniform attackers.

学术地点 信息太阳集团官方网站与工程学院106报告厅 主讲人 郭斯瑶(上海纽约大学计算机系)
讲座时间 2019年5月6日星期一,下午3:00-4:30
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