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In cryptography, encryption is the process of obscuring information to make it unreadable without special knowledge. While encryption has been used to protect communications for centuries, only organizations and individuals with an extraordinary need for secrecy had made use of it. In the mid-1970s, strong encryption emerged from the sole preserve of secretive government agencies into the public domain, and is now employed in protecting widely-used systems, such as Internet e-commerce, mobile telephone networks and bank automatic teller machines.

Encryption can be used to ensure secrecy, but other techniques are still needed to make communications secure, particularly to verify the integrity and authenticity of a message; for example, a message authentication code (MAC) or digital signatures. Another consideration is protection against traffic analysis.

Encryption or software code obfuscation is also used in software copy protection against reverse engineering, unauthorized application analysis, cracks and software piracy used in different encryption or obfuscating software

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2600 Hacker Quarterly News Archive - Article from November 1999 about cracking DVD encryption.

42 Ways to Distribute DeCSS - 42 funny ways to distribute the famous DVD descrambler, including Quake, HTTP cookies, MPEG movies and DNS queries.
Meta Description: [ 42 ways to distribute DeCSS ]

California DeCSS case - Offers links to documents in California DeCSS case.
Meta Description: [ DeCSS Injunction Reversed In CA Case -- article related to The Courts and Your Rights Online. ]

Cryptanalysis of Contents Scrambling System - A paper which shows that CSS encryption has weaknesses which make it rapidly breakable even without knowledge of any hardware keys, and describes algorithms to do so.

DeCSS Central - Reference site on DeCSS with vast background information.

404 DeCSS Central: HAL2001 Speech - Cogent presentation about the history of CSS and DeCSS and the issues involved.

DeCSS for Linux and DVD - Information about and links to various encryption and decryption tools for educational and research purposes.

DeCSS/2600 Court of Appeals Decision - Text of the decision by the 2nd Circuit Court of Appeals affirming the judgement against 2600 in the DeCSS linking case.

500 DVD Backup Guides - A detailed site offering several guides on backing up DVDs into different formats. The author also shares his views on the issue of DeCSS through informative articles.

DVD-Copy.com - Legal Battle - Copies of legal documents filed to shut down this website.
Meta Description: [ DeCSS DVD Copy | Everything you need to know about making copies / backups of your DVD. Contents Scrambling System Source Code, Decryption software ]

Gallery of CSS Descramblers - If DeCSS code is illegal in the USA, but text is protected, where do you draw the line? A gallery of exhibits of the descrambling algorithm from code through plain English to graphic images.

In Defense of Free Speech on the Internet - The Global Internet Liberty Campaign member statement opposing the efforts by the DVD-CAA to censor websites worldwide. Signed by more than fifty global civil liberties organizations.

The Truth About the DVD Case - Explanation of the court cases for DVD reverse engineering and some facts about DVD privacy.

404 Trouble with Prime Numbers - Describes technology involved, developments in court cases, and looks at the legal issues involving hyper-linking, trade secrets, freedom of speech, and translation of DeCSS into numerical format.
Meta Description: [ Electronic Law Journals - JILT Homepage ]

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