'Cipher block chaining cbc' presentation slideshows

Security

Security. Courtesy of Alvert Levi with Sabanci Univ. Terminology. Computer Security automated tools and mechanisms to protect data in a computer, even if the computers are connected to a network against hackers (intrusion) against viruses against Denial of Service attacks

2.05k views • 180 slides

ECE 4450:427/527 - Computer Networks Spring 2014

752 views • 62 slides

CS 445 / 645 Internet Security Mon & Wed, 11:30 AM ~ 12:45 PM @ SEB 1240 Spring, 2012

School of Computer Science. CS 445 / 645 Internet Security Mon & Wed, 11:30 AM ~ 12:45 PM @ SEB 1240 Spring, 2012. Monday, Jan. 30, 2012. Assignment Q.3 - Vernam Cipher. Plaintext V E R N A M Numeric eq. 21 4 17 13 0 12 + Key. 76 48 16 82 44 3

622 views • 48 slides

Cryptography and Network Security Chapter 6

333 views • 33 slides

Cryptography and Network Security Chapter 6

337 views • 32 slides

CRYPTOGRAPHY AND NETWORK SECURITY

CRYPTOGRAPHY AND NETWORK SECURITY. Multiple Encryption & DES. Clear a replacement for DES was needed Theoretical attacks that can break it Demonstrated exhaustive key search attacks AES is a new cipher alternative

266 views • 26 slides

Block Cipher Operation

Block Cipher Operation. Raj Jain Washington University in Saint Louis Saint Louis, MO 63130 Jain@cse.wustl.edu Audio/Video recordings of this lecture are available at: http://www.cse.wustl.edu/~jain/cse571-11/. Overview. Double DES, Triple DES, DES-X Encryption Modes for long messages:

821 views • 23 slides

CS 5920 Applied Cryptography Spring 2014 Chapter 6 Block Cipher Operation

CS 5920 Applied Cryptography Spring 2014 Chapter 6 Block Cipher Operation. Cryptography and Network Security Fifth Edition, by William Stallings . Multiple Encryption & DES. clearly, a replacement for DES was needed theoretical attacks that can break it

410 views • 23 slides

Cryptography CS 555

Cryptography CS 555. Topic 11: Encryption Modes and CCA Security. Outline and Readings. Outline Encryption modes CCA security Readings: Katz and Lindell: 3.6.4, 3.7. Review: IND Security.

337 views • 19 slides

Modes of Operation

Modes of Operation. CS 795. Electronic Code Book (ECB). Each block of the message is encrypted with the same secret key Problems: If two identical blocks are in the same message, cipher text would be identical. Cipher blocks can be rearranged to alter the message. Cipher Block Chaining (CBC).

210 views • 9 slides

Modes of Operation

Modes of Operation. CS 795. Electronic Code Book (ECB). Each block of the message is encrypted with the same secret key Problems: If two identical blocks are in the same message, cipher text would be identical. Cipher blocks can be rearranged to alter the message. Cipher Block Chaining (CBC).

187 views • 9 slides

Modes of Operation

Modes of Operation. CS 795. Electronic Code Book (ECB). Each block of the message is encrypted with the same secret key Problems: If two identical blocks are in the same message, cipher text would be identical. Cipher blocks can be rearranged to alter the message. Cipher Block Chaining (CBC).

212 views • 9 slides

Modes of Operation

Modes of Operation. CS 795. Electronic Code Book (ECB). Each block of the message is encrypted with the same secret key Problems: If two identical blocks are in the same message, cipher text would be identical. Cipher blocks can be rearranged to alter the message. Cipher Block Chaining (CBC).

163 views • 9 slides

More About DES

More About DES. Cryptography and Network Security. Reference: Sec 3.1 of Stallings Text. Block Cipher Modes of Operation. Sec 3.7 of text How is DES used in applications? Input to encryption is not always the bits of the plaintext Modes Electronic Codebook (ECB)

85 views • 8 slides