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Notes for UMich EECS 598 (2015) are for Lattices in Cryptography virtually instructed by Chris Peikert (i.e., I taught myself using resources made available by him). This entry is for homework 3, homework 4 and lecture note 5.
Notes for UMich EECS 598 (2015) are for Lattices in Cryptography virtually instructed by Chris Peikert (i.e., I taught myself using resources made available by him). This entry is for homework 2.
Notes for UMich EECS 598 (2015) are for Lattices in Cryptography virtually instructed by Chris Peikert (i.e., I taught myself using resources made available by him). This entry is for lecture 4, Coppersmith, cryptanalysis.
Notes for UMich EECS 598 (2015) are for Lattices in Cryptography virtually instructed by Chris Peikert (i.e., I taught myself using resources made available by him). This entry is for homework 1.
Notes for UMich EECS 598 (2015) are for Lattices in Cryptography virtually instructed by Chris Peikert (i.e., I taught myself using resources made available by him). This entry is for lecture 3, LLL, Coppersmith.
Notes for UMich EECS 598 (2015) are for Lattices in Cryptography virtually instructed by Chris Peikert (i.e., I taught myself using resources made available by him). This entry is for lecture 2, SVP, Gram–Schmidt, LLL.
Notes for UMich EECS 598 (2015) are for Lattices in Cryptography virtually instructed by Chris Peikert (i.e., I taught myself using resources made available by him). This entry is for lecture 1, mathematical background.
Kowalczyk 和 Wee 在 EUROCRYPT 2019（欧密会）上发表的文章 Compact Adaptively Secure ABE for NC¹ from 𝑘-Lin 可以说是彻底解决了 NC¹ 访问策略的属性加密问题。我在最近的密码学读书会上将讲述该文，这篇博文算是我用母语对该文章的总结（感觉我脑内思考语言仍然是汉语），也算是在中文密码学社区里传播知识。
![[KW19] 标准假设下适用于 NC¹ 策略的紧凑、适应性安全的属性加密](/entries/kw19-abe-nc1/assets/hero.png)
理想（ideal）是出现在抽象代数（更特别地，环论）中的一类对象，其命名很有渊源。之前我只知道这个名字来源于一位数学家研究惟一分解时引入的“理想数”（该研究的思路和一般化最终形成了现代数学语言中“理想”的定义），但是具体的细节不是很明白；最近在阅读基于格（lattice）的密码学的内容，其中提到了环上的格（ring lattice），其中提到了理想格（环的一个子集，同时满足格和理想的要求），好奇心一发不可收拾，读了一些数学历史故事，对“理想数”加深了认识，记录下来以飨观众。文章最后讨论了“理想数”这个翻译的不达意之处。
操作系统课中讲安全的一节是代课老师上的，期间他推荐了 The Code Book (Simon Singh) 这本书，说是讲密码学历史的。我对密码学感兴趣，就读了一读，并照“不动笔墨不读书”的原则，记了读书笔记，发表出来以飨观众。
