题目：On the CAESAR Authenticated Encryption Competition
报告内容摘要：
    The Competition for Authenticated Encryption: Security,Applcability, and Robustness (CAESAR) started in 2013 and completed in 2019. The COPA authenticated encryption mode was proved to have a birthday-bound security on integrity, and its instantation AES -COPA was claimed or conjectured to have a full security on tag guessing. The Marble authenticated encryption algorithm was claimed to have a full security on authenticity. Both AES- -COPA and Marble were submitted to in 2014 as two candidates. In this paper, we present almost universal forgery attacks on the basic cases of COPA, AES -COPA and Marble, and show that the basic cases of COPA and AES-COPA have roughly at most a birthday-bound security on tag guessing and the basic case of Marble has roughly at most a bithday-bound security on authenticity. At last, we go through a few cryptanalysis results on CAESAR candidates.
附报告人简介：
    吕继强，北京航空航天大学网络空间安全学院研究员、博士生导师，北京航空航天大学学术委员会委员，中国密码学会高级会员、密码算法专业委员会委员。研究方向为对称密码算法、侧信道安全和白盒密码实现，主要从事了欧盟、法国、中国的四个理论性的科研基金项目和荷兰、德国、阿联酋、新加坡的四个实用性的工业项目，以唯一或第一作者发表理论研究型和应用研究型学术论文三十余篇，提出了分组密码的三个新的分析方法和现有分析方法的三个新技术，发表了美国高级数据加密标准AES等国际上广泛使用的十五个分组密码算法的安全分析、全球移动通信系统GSM的A5/1流密码算法的详细实用的安全攻击、国际认证加密竞赛CAESAR候选算法的安全分析、美国数据加密标准DES和高级数据加密标准AES的智能卡实现的能量攻击与安全实现、美国消息认证码标准KMAC的白盒实现。

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