PPT-Practical Aspects of Modern Cryptography

Josh Benaloh Tolga Acar Fall 2016 October 25 2016 2 The wiretap channel Key K 1 Key K 2 Eavesdropper Plaintext P Noisy insecure channel Encrypt Decrypt Alice Bob Plaintext. 897 Special Topics in Cryptography Instructors Ran Canetti and Ron Rivest Lecture 25 PairingBased Cryptography May 5 2004 Scribe Ben Adida 1 Introduction The 64257eld of PairingBased Cryptography has exploded of . Modern Cryptography. Josh Benaloh. Brian . LaMacchia. Winter 2011. Side-Channel Attacks. Breaking a cryptosystem is a frontal attack, but there may be easier access though a side or back door – especially on embedded cryptographic devices such as . of . Modern Cryptography. Josh Benaloh. Brian . LaMacchia. Winter 2011. Some Tools We’ve Developed. Homomorphic Encryption. Secret . Sharing. Verifiable Secret Sharing. Threshold Encryption. CS. . 111. Operating . Systems . Peter Reiher. . Outline. Basic concepts in computer security. Design principles for security. Important security tools for operating systems. Access control. Cryptography and operating systems. Week two!. The Game. 8 groups of 2. 5 rounds. Math 1. Modern history. Math 2. Computer Programming. Analyzing and comparing Cryptosystems. 10 questions per round. Each question is worth 1 point. Math Round 1. Problem 1. Each participant . selects a random polynomial. The joint secret is the sum of the original secrets. How are shares of the joint secret formed?.  . 3/10/2011. Practical Aspects of Modern Cryptography. Maps from Lattices. Craig Gentry (IBM. ). Sergey . Gorbunov. (. MIT). Shai Halevi (IBM). https. ://eprint.iacr.org/2014/645. July 10, 2015. The Mathematics of Modern Cryptography. Multilinear Maps (MMAPs). What is cryptography?. The study and practice of using encryption techniques for secure communication. Mainly about creation and analysis of protocols that keep private messages private. Utilizes mathematics, computer science and electrical engineering in its use. Richard J. Blech. Chief Executive Officer. Secure Channels, Inc.. Is there anyone here who cannot parse and explain this equation?. 2. If not, that’s ok.. 3. Why Pre-Computer Cryptography?. If you understand pre-computer crypto, you understand crypto!. 1. Administrative Note. Professor Blocki is traveling and will be back on Wednesday. . E-mail: . jblocki@purdue.edu. . Thanks to Professor Spafford for covering the first lecture!. 2. https://www.cs.purdue.edu/homes/jblocki/courses/555_Spring17/index.html. Steven M. Bellovin. https://www.cs.columbia.edu/~smb. What is Cryptography?. Literally: “hidden writing”. (Technical, the entire field is “cryptology”, but almost no one except the NSA and historians uses that word.). The . art and science of concealing the messages to introduce secrecy in . information security . is recognized as cryptography. .. The word ‘cryptography’ was coined by combining two Greek words, ‘Krypto’ . Crypto is amazing. Can do things that initially seem impossible. Crypto is important. It impacts each of us every day. Crypto is fun!. Deep theory. Attackers’ mindset. Necessary administrative stuff. CA Ashok . Batra. A. K. . Batra. & Associates, New Delhi. 1/29/2021. AK Batra & Associates. 1. PRACTICAL ASPECTS IN GST ASSESSMENTS. 1/29/2021. AK Batra & Associates. 2. “. Assessment” clause 2(11).