Cryptography

Nov 14, 2012

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Cryptography

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Cryptography

Cryptography. Past, Present, and Future. Presenter: Group 3 Ahmed Abdalla, Troy Brant, Gabe Campbell, Ana Lim, Saudamini Zarapkar. Outline. A Brief History of Cryptography Symmetric Encryption Asymmetric Cryptography Politics in Cryptography Quantum Cryptography Summary. Outline

2.1k views • 67 slides

Cryptography

Terminology. Encryption: transforming a plain text message or file into a disguised cipher text Plain text ? Cipher text Decryption: involves turning the cipher text back into plain text Cipher text ? Plain text Plain text? Data to be protected Cipher text?Data after encryp

859 views • 57 slides

Cryptography

Cryptography. Module II. Data Encryption Standards DES. Product block. P-boxes and S-boxes can be combined to get a more complex cipher block, called Product block.

786 views • 39 slides

Cryptography

Cryptography was known anciently as Encryption which means : Hiding the information from unauthorized entities . Various methods were used to adopt this purpose , it could be implemented manually , mechanically or even electronically .

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Cryptography

Cryptography. Lecture 2 Arpita Patra. Summary of Last Class. Introduction. >> Zoo/ Mammoth and felt the subject’s vastness against our negligible knowledge >> Three fundamental principles of Modern Crypto – Formal Definitions, Well-studied Assumptions, Sound Proofs.

252 views • 16 slides

CRYPTOGRAPHY

CRYPTOGRAPHY. Alex Puga Albert Andrea Moreno Rodríguez 4rtC Project: Math in English. ITINERARY. 1. What cryptography is? 2. Brallie 2.1. Louis Braille 2.2. Brallie alphabet 2.3. Activitiy 3. ASCII code 4. QR code. BRAILLE.

341 views • 10 slides

Cryptography

Cryptography. A Presentation by: ~Ksenia Potapov ~Amariah Condon ~Janette Fong ~Janice Lau. Definition – JANETTe. Cryptography is the study of techniques for secure communication in the presence of third parties. Applications of cryptography include ATM cards, computer passwords, etc.

623 views • 18 slides

Cryptography

Cryptography. What We Will Learn. Basic cryptographic primitives Attacks on cryptography When to use which cipher If you want to learn more about this topic take a class on cryptography with Shanghua Teng . What Is Cryptography?. Goal: Protect private communication in the public world

1.09k views • 79 slides

CRYPTOGRAPHY

CRYPTOGRAPHY. lecture 3 Wednesday. The difference between substitution and transposition is that in: Subtitution: each letter retains its position but changes its identity, Transposition: each letter retains its identity but changes its position. Example 3. HW #2: Caesar shift problems.

440 views • 24 slides

Cryptography

Cryptography. CSc 8320 Advanced Operating Systems Barnali Chakrabarty. Overview. What is Cryptography ? Its history And its fundamentals Public and Private Cryptographic Systems Current Work Future Research. What is Cryptography ?.

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Cryptography

Cryptography. Chapter 14. Learning Objectives. Understand the basics of algorithms and how they are used in modern cryptography Identify the differences between asymmetric and symmetric algorithms

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Cryptography

Cryptography. Contact Information. Introduction. Cryptology. A form of communication which is primarily concerned with the secure transmission (through encryption ) of a secret message over an insecure channel. Cryptography. +.

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Cryptography

Cryptography. Methods of Encryption. Transposition Switching the symbols within the plaintext Substitution Substituting different symbols for the symbols in the plaintext. Transposition. Rail fence cipher: one if by land two if by sea - plaintext o e f y a d w i b s a

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Cryptography

Cryptography. Cryptography : art or science of keeping messages secret Cryptology : branch of mathematics that studies the mathematical foundations of cryptographic methods. Plaintext P = the original message.

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Cryptography

Cryptography. Troy Latchman Byungchil Kim. Fundamentals. We know that the medium we use to transmit data is insecure, e.g. can be sniffed. Cryptography allows a sender to disguise data in hopes that an intruder can gain no information from the intercepted data. Fundamentals.

503 views • 33 slides

Cryptography

Cryptography. Introduction postponed to next week. Course Outline. 10 labs @ 4% 40% 2 Lab tests @ 10% 20% Two tests @15% 30% Week 7 and 14 Professionalism 10% No text, we use on-line and other resources

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Cryptography

Cryptography. The Science, Mathematics, and Art of Secrecy. Who is the largest of employer of mathematicians in the world (and a significant employer of computer scientists). Click for the Answer. Terms. Information Assurance Securing systems from unauthorized entry

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Cryptography

Cryptography. A simple example…. Text: U-M ASCII Encoded: 01010101 00101101 01001101 “Encoding” refers to convenient reformatting. No secrecy here. Call it plaintext. Let’s “Encrypt” it, i.e. hide its meaning from nosy 3 rd parties. A simple example….

526 views • 39 slides

Cryptography

Cryptography. Dave Feinberg. Email. Suppose I send an email from fberg@cs.cmu.edu to tomcortina@gmail.com Who has access to that email? What if I want the message to be private?. Encryption. Should it be legal to send encrypted messages?

777 views • 56 slides

Cryptography

Cryptography. Instructor: Dr. Yanqing Zhang Presented by: Rajapaksage Jayampthi S. Outline. Section I (Theory) Introduction Symmetric Key Cryptography Examples Key Issues Public Key Encryption Algorithms Comparison of Cryptographic systems Hybrid Secret-Public Key Cryptography

370 views • 23 slides

Cryptography

Cryptography. Public Key Cryptosystems. ElGamal Encryption: Based on Diffie Hellman Key Exchange. Security of Diffie Hellman key exchange not based on integer factoring (like RSA and Rabin) but on the discrete logarithm problem (DLP). Discrete Logarithm. Diffie Hellman Key Exchange.

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