• “Assurance is best addressed during the initial design and engineering of security systems, NOT as an after market patch. The earlier you include a security architect in your design process, the greater the likely hood of a successful and robust design. As the quip goes, he who gets to the (module) interface first wins.”

    Brian Snow, Former Technical Director of the US National Security Agency (NSA), "We need Assurance", AusCERT 2008

  • "Today’s systems must anticipate future attacks. Any comprehensive system – whether for authenticated communications, secure data storage, or electronic commerce – is likely to remain in use for five years or more. It must be able to withstand the future: smarter attackers, more computational power, and greater incentives to subvert a widespread system. There won’t be time to upgrade it in the field."

    Bruce Schneier, "Why Cryptography Is Harder Than It Looks", 1997
  • “It's not good enough to have a system where everyone (using the system) must be trusted, it must also be made robust against insiders!”

    Robert Morris, former Chief Scientist of the US National Security Agency (NSA), National Computer Security Center, "Crypto '95 invited talks by R. Morris and A. Shamir", 1995

  • “We are a cyber nation. The U.S. information infrastructure--including telecommunications and computer networks and systems and the data that reside on them--is critical to virtually every aspect of modern life. This information infrastructure is increasingly vulnerable to exploitation, disruption, and destruction by a growing array of adversaries.”

    The National Coordination Office (NCO) for Networking Information Technology Research and Development (NITRD), Federal Register: December 30, 2008 (Volume 73, Number 250).

  • The software security industry today is at about the same stage as the auto industry was in 1930" ... "it looks fast, goes nice but in an accident you die.” ... "The major shortfall is absence of assurance (or safety) mechanisms in software. If my car crashed as often as my computer does, I would be dead by now."

    Brian Snow, Former Technical Director of the US National Security Agency (NSA), "We need assurance!", 1999-2008

  • "Some physicists predicted that within the next 10 to 20 years quantum computers will be built that are sufficiently powerful to implement Shor’s ideas and to break all existing public key schemes. Thus we need to look ahead to a future of quantum computers, and we need to prepare the cryptographic world for that future.

    Prof Seth Lloyd of MIT, MIT Review 2008

  • "My colleagues at MIT and I have been building simple quantum computers and executing quantum algorithms since 1996, as have other scientists around the world. Quantum computers work as promised. If they can be scaled up, to thousands or tens of thousands of qubits from their current size of a dozen or so, watch out!

    Prof Seth Lloyd of MIT, MIT Review 2008

  • “The more complex the threats become, the more you have to do the basics and groundwork really well. Staying aware and on top of new vulnerabilities and ensuring that patches and software updates are rapidly implemented is crucial.”

    Jeff Shipley, Cisco Intelligence Collection Manager, Cisco 2008 Annual Security Report

  • In the next five years we will counter many 'hacker' attacks but we will not be safe from Nation States and other large entities

    Brian Snow, Former Technical Director of the US National Security Agency (NSA), "We need assurance!", 1999-2008

  • “Business now relies on information infrastructures that are interlinked and interdependent… The way in which these hidden interdependencies pervade our everyday lives is staggering and, in some cases, may go unchecked for many years until an incident occurs that revels the true nature of the interdependences' impact.”

    The British Government’s Technology Strategy Board, 2008
  • "Given their power to intercept and disrupt secret communications, it is not surprising that quantum computers have the attention of various U.S. government agencies.  The National Security Agency, which supports research in quantum computing, candidly declares that given its interest in keeping U.S. government communications secure, it is loath to see quantum computers built. On the other hand, if they can be built, then it wants to have the first one.”

    Prof Seth Lloyd of MIT, MIT Review 2008

  • "But conventional security is not enough. The complexity of today's operational environment means organisations must embrace a level of business resilience that is normally associated with the protection of critical national infrastructure."

    Detica, a BAE Systems Company

Resources Security bibliography Block ciphers bibliography: Data Encryption Standard (DES)
bibliography: Data Encryption Standard (DES)
Security bibliography - Block ciphers
Inventors: William Ehrsam,  Carl Meyer, Robert Powers, John Smith, Walter Tuchman
Organisation: IBM
Date: 1976
Keywords: symmetric encryption
Electronic Publication: Patent: US 3962593
Description:

DES is an symmetric cryptographic algorithm used for data privacy. DES is a symmetric algorithm because the sender and the receiver share a common secret key. The most common method of successfully attacking DES is to perform a brute force attack which exhaustively tests every possible key combination.

Attacks:

The COPACOBANA machine, built for US$10,000 by the Universities of Bochum and Kiel,Germany, contains 120 low-cost FPGAs and can perform an exhaustive key search on DES in 6.4 days on average.  This means that DES running with a 56-bit key be broken in 6.4 days on average for only US$10,000.

Note: In October 1999 the US NIST standardised Triple DES as a more secure alternative to DES. Triple DES encrypts or decrypts a block of data three times, each operation with a different 56-bit key. See FIPS 46-3.
Citation:

Ehrsam, et al, "Product block cipher system for data security", United States Patent 3,962,539, June 8, 1976.

Related work: 3DES, AES

 
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