'Perfect secrecy' presentation slideshows

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???. ????. ?????????. ??? Number Theory) ???? ? Information Theory ? ????? ? Complexity Theory ? ????? Combinatoric Theory ? ??? Probability ? ?????? Linear Algebra ?. Information Theory. Shannon 1984 ?????? (Information Theory) ???? (Coding Theory)

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Inaccessible Entropy

Omer Reingold Weizmann Institute. Salil Vadhan Harvard University. Iftach Haitner Microsoft Research. Hoeteck Wee Queens College, CUNY. Inaccessible Entropy. TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A. outline. Entropy

509 views • 47 slides

Inaccessible Entropy

Omer Reingold Weizmann Institute. Salil Vadhan Harvard University. Iftach Haitner Microsoft Research. Hoeteck Wee Queens College, CUNY. Inaccessible Entropy. TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A. outline. Entropy

604 views • 47 slides

Introduction to Cryptography

814 views • 46 slides

Language Modeling and Encryption on Packet Switched Networks

Language Modeling and Encryption on Packet Switched Networks. Kevin McCurley. A.A. Markov of St. Petersburg 1856-1922. ?????? ????????? ??????. The science of cryptology. Devise a mathematical model of communication Devise a mathematical model of an adversary Construct a cryptosystem

557 views • 44 slides

Encryption and Decryption

Encryption and Decryption. Speaker:Tsung Ray Wang Advisor:Prof.Li-Chun Wang. Contents. MODELS,GOALS,AND EARLY CIPHER SYSTEMS THE SECRECY OF A CIPHER SYSTEM PRACTICAL SECURITY STREAM ENCRYPTION PUBLIC KEY CRYPTOSYSTEMS. Model of a cryptographic channel. Cryptanalyst.

691 views • 38 slides

Cryptography and Network Security

Cryptography and Network Security. Sixth Edition by William Stallings . Chapter 2. Classical Encryption Techniques.

594 views • 37 slides

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527 views • 34 slides

Today

Today. What does it mean for a cipher to be: Computational secure? Unconditionally secure? Perfect secrecy Conditional probability Definition of perfect secrecy Systems that provide perfect secrecy How secure when we reuse a key? Entropy Redundancy of a language

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Cryptography

Cryptography. Lecture 3. Perfect secrecy (formal).

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Information theory

Information theory. Cryptography and Authentication A.J. Han Vinck Essen, 2003. Cryptographic model. sender receiver attacker secrecy encrypt M decrypt M read M find key authentication sign test validity modify generate.

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A Randomized Space-Time Transmission Scheme for Secret-Key Agreement

A Randomized Space-Time Transmission Scheme for Secret-Key Agreement. Xiaohua (Edward) Li 1 , Mo Chen 1 and E. Paul Ratazzi 2 1 Department of Electrical and Computer Engineering State University of New York at Binghamton {xli, mchen0}@binghamton.edu, http://ucesp.ws.binghamton.edu/~xli

414 views • 27 slides

Chapter 2

Chapter 2. Classical Encryption Techniques. Symmetric Encryption. Also referred to as conventional encryption or single-key encryption Was the only type of encryption in use prior to the development of public-key encryption in the 1970s

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Information Theory for Secrecy and Control

Information Theory for Secrecy and Control. Paul Cuff Electrical Engineering Princeton University. Two Parts. Secrecy for competitive settings Historic Results New Metric for Secrecy Embedding information in analog signals Background of watermarking Theoretical limit. Cipher.

343 views • 25 slides

Space-Time Transmissions for Wireless Secret-Key Agreement with Information-Theoretic Secrecy

Space-Time Transmissions for Wireless Secret-Key Agreement with Information-Theoretic Secrecy. Xiaohua (Edward) Li 1 , Mo Chen 1 and E. Paul Ratazzi 2 1 Department of Electrical and Computer Engineering State University of New York at Binghamton {xli, mchen0}@binghamton.edu,

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CMSC 414 Computer and Network Security Lecture 3

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Using Secret Key to Foil an Eavesdropper

Using Secret Key to Foil an Eavesdropper. Paul Cuff Electrical Engineering Princeton University. Main Idea. Secrecy for distributed systems Historic Cryptography Results New Metric for Secrecy. Distributed System. Action. Node B. Message. Information. Node A. Attack. Adversary.

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Information-Theoretic Secrecy

535 views • 16 slides

The One Time Pad

253 views • 14 slides