'Plaintext attack' presentation slideshows

Cryptanalysis

Cryptanalysis. Khaled Kamal Ragia Al Bassyouni. Cryptanalysis. Definition

1.14k views • 83 slides

Overview of the latest RFID Research at Auto-ID Lab, ADELAIDE

Overview of the latest RFID Research at Auto-ID Lab, ADELAIDE. Alfio Grasso Deputy Director, Auto-ID Lab, Adelaide. Overview. Auto-ID Lab, Adelaide Security Anti-Counterfeiting and Security Authentication Lightweight Cryptography Specialised RFID Tag Antenna Design Conclusions.

799 views • 62 slides

symmetric key cryptography

1.32k views • 52 slides

CMEA

CMEA. CMEA. C ellular M essage E ncryption A lgorithm Designed for use with cell phones To protect confidentiality of called number For “control channel”, not the “data channel” Data channel encrypted with ORYX Part of a standard developed by TIA Flaw in cipher discovered in 1997

632 views • 50 slides

History and Background

History and Background. CSIS 5857: Encoding and Encryption. Why is History Important?. Most modern encryption algorithms based on concepts hundreds/thousands of years old Monoalphabetic substitution Polyalphabetic substitution Transposition Most attacks on encryption also very old

636 views • 48 slides

CIS 5371 Cryptography

CIS 5371 Cryptography. 7 . Asymmetric encryption-. Public Key Cryptography. Alice Bob. Alice and Bob want to exchange a private key in public. Public Key Cryptography The Diffie -Hellman protocol. Let p is a large prime and . The order of is a factor of .

687 views • 41 slides

Anti Hacker Poetry in the Mac OS X

Anti Hacker Poetry in the Mac OS X. Your karma check for today: There once was a user that whined/ his existing OS was so blind/ he'd do better to pirate/ an OS that ran great/ but found his hardware declined./ Please don't steal Mac OS!/ Really, that's way uncool./

544 views • 37 slides

DIFFERENTIAL CRYPTANALYSIS

DIFFERENTIAL CRYPTANALYSIS. Chapter 3.4. Ciphertext only attack. The cryptanalyst knows the cryptograms. This happens, if he can eavesdrop the communication channels. Known-plaintext attack. The adversary can access not only the communication channels but also parts of plaintext.

675 views • 36 slides

Cryptanalysis

Cryptanalysis. Aaron Willett. What is Cryptology?. Cryptography (Encryption) the practice and study of techniques for secure communication in the presence of third parties Cryptanalysis (Decryption)

1.9k views • 36 slides

Fundamentals of Computer Security

Fundamentals of Computer Security. More Classical Ciphers. Attacks on Cryptosystems. Ciphertext Only Attack Chosen-Plaintext Attack Known-Plaintext Attack Rubber-hose Attack. Cryptanalysis.

462 views • 24 slides

Terminology and classical Cryptology

Terminology and classical Cryptology. By Hafez Barghouthi. What is Cryptology?. Terminology. The art and science of keeping messages secure is cryptography, and it is practiced by cryptographers.

377 views • 23 slides

Anti Hacker Poetry in the Mac OS X

Anti Hacker Poetry in the Mac OS X. Your karma check for today: There once was a user that whined/ his existing OS was so blind/ he'd do better to pirate/ an OS that ran great/ but found his hardware declined./ Please don't steal Mac OS!/ Really, that's way uncool./

348 views • 23 slides

Information Security CS 526 Topic 2

Information Security CS 526 Topic 2. Cryptography: Terminology & Classic Ciphers. Readings for This Lecture. Required readings: Cryptography on Wikipedia Interesting reading The Code Book by Simon Singh. Goals of Cryptography.

337 views • 21 slides

Privacy and Authentication: An Introduction to Cryptography

Privacy and Authentication: An Introduction to Cryptography. Very Brief. Whitfield Diffie, Martin Hellman (and Isabelle Stanton). What is Cryptography?. Definition: The science or study of the techniques of secret writing, esp. code and cipher systems, methods, and the like

300 views • 20 slides

Introduction to Symmetric Block Cipher

329 views • 18 slides

Chap 3: Key exchange protocols

Chap 3: Key exchange protocols. In most systems, we distinguish the short term keys from the long term ones: A short term key (session key) is used to protect one conversation Long term key is used to distribute the session keys Reduce the amount of traffic encrypted by each secret.

381 views • 18 slides

Applied Cryptography

Applied Cryptography. Chapter 1 Foundations Jaewon Lee. Terminology. Sender and Receiver Messages and Encryption Authentication, Integrity, and Nonrepudiation Algorithms and Keys Symmetric Algorithms Public-Key Algorithms Cryptanalysis Security of Algorithms. Encryption and Decryption.

376 views • 15 slides

A Genetic Algorithm for Cipher text-Only Attack in Cryptanalysis

A Genetic Algorithm for Cipher text-Only Attack in Cryptanalysis. Agenda: Genetic Algorithms Cryptanalysis Proposed Algorithm. Genetic Algorithm. Genetic Algorithms are good at taking large, potentially huge search spaces and navigating them, looking for optimal

440 views • 14 slides

CMSC 414 Computer and Network Security Lecture 4

CMSC 414 Computer and Network Security Lecture 4. Jonathan Katz. One-time pad. The one-time pad achieves perfect secrecy But, it has a number of drawbacks Key size equal to message size Can only be used once Insecure under chosen-plaintext attack

186 views • 11 slides

Lect. 10 : Cryptanalysis

225 views • 8 slides