PPT-Birthday Attacks A way to detect a collision…

Principle Of MD Strongly collisionfree Cant find any pair m 1 m 2 such that hm 1 hm 2 easily Sometimes we can settle for weakly collisionfree given m cant find m m with hm hm. Generic . b. irthday attack. Online Cryptography Course Dan Boneh. Generic attack on C.R. functions. Let H: M .  {0,1}. n. . be a hash function . ( |M| >> 2. CSCI 5857: Encoding and Encryption. Outline. Information integrity issues . Message digests . Hash functions. Insuring information integrity. Attacks on message digests. Preimage. attacks. Collision attacks. PRESENTED By. Sravani . kambam. 1. Outline:. Introduction. Attacks on Wi-Fi . . Networks. DAIR Architecture. Detecting Attacks. Experimental Results. Channel Assignment. Limitations. Related Work. Future Work. Security Service for the Internet. Jelena Mirkovic. sunshine@isi.edu. USC Information Sciences Institute. Joint work with . Minlan. Yu (USC), . Ying . Zhang (HP Labs. ) and Abdulla . Alwabel. (USC). advanced attacks:. Microsoft . Advanced . Threat . Analytics. Preview . Demi . Albuz. Benny . Lakunishok. BRK3870. Sobering statistics. $3.5M. The average cost of a data breach to a company . 200+. The median # of days that attackers reside within a victim’s network before detection . Based on material by Prof. Vern . Paxson. , UC Berkeley. Detecting Attacks. Given a choice, we’d like our systems to be airtight-secure. But often we don’t have that choice. #1 reason why not: cost (in different dimensions). Security Service for the Internet. Jelena Mirkovic. sunshine@isi.edu. USC Information Sciences Institute. Joint work with . Minlan. Yu (USC), . Ying . Zhang (HP Labs. ) and Abdulla . Alwabel. (USC). CSCI 5857: Encoding and Encryption. Outline. Attacks on message digests. Preimage. attacks. Collision attacks. Properties of a good hash function. Mathematical background. Pigeonhole principle. Birthday . Based on material by Prof. Vern . Paxson. , UC Berkeley. Detecting Attacks. Given a choice, we’d like our systems to be airtight-secure. But often we don’t have that choice. #1 reason why not: cost (in different dimensions). Paxson. , UC Berkeley. Detecting Attacks. Given a choice, we’d like our systems to be airtight-secure. But often we don’t have that choice. #1 reason why not: cost (in different dimensions). A (messy) alternative: detect misuse rather than build a system that can’t be misused. Hash functions. (Cryptographic) hash function: deterministic function mapping arbitrary length inputs to a short, fixed-length output (sometimes called a . digest. ). Hash functions can be . keyed. or . Cryptography Lecture 14 Hash functions Q and A; b ring the written answers to TA before the class 1. Write down and remember the syntax and security definition Network Monitoring Stolen from: Daniel Schatz @virturity Announcements MT2 grades released! HW3 due Friday Project 2 Autograder Released Project 3 due Monday Remaining lectures: Special Topics Monitoring for Attacks, How Nation States Spy (hint, its the same stuff), Malcode, and Trusting Trust, Tracking on the Web, Hardware Attacks, Conclusions Security Officer. CISM, CISA, CISSP, CCIE-Security. overdag@ualr.edu. INFOSEC Components. WHY?. Average cost of a data breach:. 4 Million. Average cost of a breach data:. $221/record. Cost of a data breach for Higher Education:.