Digital
Multimedia

Fall 2006
course
navigation

nov 7

all these are wikipedia articles
public-key cryptography * background : - symmetric keys - asymmetric keys - signing - how it works : http://cs.marlboro.edu/msie/2005/crypto.html * gpg * openssl * public key repositories, - http://keyserver.verdis.com:11371/ - Jim Mahoney 2000 0x29A4465F copyright * US * after 1978: life of author + 70 years * before 1923: public domain DRA - digital rights management * technologies to prevent copying, typicall of music / video DMCA - digital millenium copyright act * illagal to produce and disseminate technology to circumvent copyright DVD CSS - 1996, content scrambling system DeCSS - 1999, Jon Lech Johansen (as a teenager) FairPlay - Apple iTunes public/private keys in various places; hardcoded into QuickTime encrypted signal AACS - Advanced Access Content System (HD DVD, Blu Ray) Jon Lech Hohansen 2005_Sony_CD_copy_protection_scandal playing one of their DVD's ... would overright part of Windows OS 'rootkit' connect to Sony ... in a way that had vulnerabilities spyware digital watermarking steganography example: outguess.org; cs: outguess, stegdetect see http://cs.marlboro.edu/~mahoney/outguess

http://cs.marlboro.edu/ courses/ fall2006/multimedia/ notes/ nov_7
last modified Tuesday November 7 2006 10:09 am EST