Cryptography is the science of using mathematics to encrypt and decrypt data. Cryptography enabIes you to store sensitive information or transmit it across insecure networks…

1. Cryptography and Network Security Third Edition by William Stallings Lecture slides by Lawrie Brown 2. Chapter 2 –Classical Encryption Techniques Many savages at the…

1. Cipher TechniquesApril 9, 2013 1 2. Road Map BasicTerminology Cryptosystem Classical Cryptography Algorithm Types and Modes Data Encryption Standard…

Cryptography Ratan Guha School of Computer Science University of Central Florida Orlando, FL 32816 [email protected] August 5, 2004 Acknowledgement These slides have been developed…

Slide 1 Crypto for CTFs RPISEC 2013 Ben Kaiser Slide 2 Terminology plaintext - the original message ciphertext - the coded message cipher - algorithm for transforming plaintext…

Slide 11 Cryptography and Network Security Third Edition by William Stallings Lecture slides by Lawrie Brown [Changed by Somesh Jha] Slide 2 2 Classical Encryption Techniques…

Slide 1 Creating Secret Messages Slide 2 2 Why do we need to keep things secret? Historically, secret messages were used in wars and battles For example, the Enigma cipher…

Slide 1 Announcement Grading adjusted –10% participation and two exams 20% each Newsgroup up Assignment upload webpage up Homework 1 will be released over the weekend Slide…

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Slide 1 Classical Encryption Techniques Lecture slides adapted from Lawrie Brown 1 Slide 2 Chapter 2 – Classical Encryption Techniques Many savages at the present day regard…