0x00 序 今天是Black Hat 2015第一天,九点钟开场.开场介绍是由Black Hat创始人Jeff Moss讲的.随后又请来了Stanford law school的Jennifer Granickz做了keynote speech. 随后就开始Black Hat的正会了,因为Black Hat是9个分会场同时进行,所以我们只能挑一些比较感兴趣的演讲去听. 0x01 ANDROID SECURITY STATE OF THE UNION 这个talk的演讲者是Google Andr…
你的指纹还安全吗? 0x03 FINGERPRINTS ON MOBILE DEVICES: ABUSING AND LEAKING speaker是来自FireEye的Wei Tao和Zhang Yulong.Talk首先介绍了指纹系统的原理以及实现,比如如何进行特征采集,如何对比特征等. 随后讲了2种架构, 一种是Fingerprint without TrustZone和Fingerprint with TrustZone.在root情况下without TrustZone是非常危险的,…
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2021-01-29 题目链接: Educational Codeforces Round 103 (Rated for Div. 2) 题目 A. K-divisible Sum You are given two integers nn and kk. You should create an array of nn positive integers a1,a2,-,ana1,a2,-,an such that the sum (a1+a2+⋯+an)(a1+a2+⋯+an) is div…