Security Now 183

Security Now Episode 183

Topics

News and Errata

• Microsoft Windows Update

• IE7 Problems

• Active X control issues

• Firefox/Thunderbird/ Mozilla Update

• Windows 7 security issues

• SQL Attacks

Modes of Encryption

Starts 52:00

• Asymmetric, where one key is used to encrypt and another to decrypt
• Computationally intensive due to long key lengths being needed to get good security
• Due to this the message is encrypted using symmetric encryption and the key to it encrypted using asymmetric

Symmetric block ciphers

• 128 Bits go in, 128 bits come out.
• Transformed into a different 128 bits
• Change 1 bit on the input half of the output bits change
• Other input the key
• Strength of the encryption gets stronger exponentially with key length

Sponsors

GoToMeeting

Ad Time: 0:51-1:04 and 0:48:51-0:51:56

Nerds On Site

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Ad Time: 0:33-0:50 and 04:30-07:49

Production Information

• Recorded Date: February 11, 2009
• Release Date: February 12, 2009
• Duration: 1:27:52
• Log line:
• Edited by: Tony
• Notes: Were a couple of Mac sounds when Leo had run out of space on the Skype machine then had to empty trash.

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