• Build-in Security: Ensure that security is considered and built into the design of new infrastructure, so that our critical assets are protected from the start and more resilient to naturally-occurring and deliberate threats throughout their life-cycle."

    Obama-Biden Plan, Agenda: Homeland Security, December 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

  • “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

  • “Consider the use of smart cards ... for especially critical functions.  Although more costly than software, when properly implemented the assurance gain is great.  The form-factor is not as important as the existence of an isolated processor and address space for assured operations – an ‘Island of Security,’ if you will.  Such devices can communicate with each other through secure protocols and provide a web of security connecting secure nodes located across a sea of insecurity in the global net.”

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

  • 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

  • “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

  • "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

  • “When will we be secure? Nobody knows for sure – but it cannot happen before commercial security products and services possess not only enough functionality to satisfy customers’ stated needs, but also sufficient assurance of quality, reliability, safety, and appropriateness for use. Such assurances are lacking in most of today’s commercial security products and services.”

    Brian Snow, Former Technical Director of the US National Security Agency (NSA), "We need Assurance", 2005

  • "History has taught us: never underestimate the amount of money, time, and effort someone will expend to thwart a security system. It's always better to assume the worst. Assume your adversaries are better than they are. Assume science and technology will soon be able to do things they cannot yet. Give yourself a margin for error. Give yourself more security than you need today. When the unexpected happens, you'll be glad you did."

    Bruce Schneier, "Why Cryptography Is Harder Than It Looks", 1997
  • “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).

Resources Security bibliography Block ciphers bibliography: Advanced Encryption Standard (AES)
bibliography: Advanced Encryption Standard (AES)
Security bibliography - Block ciphers
Inventors: Vincent Rijmen, Joan Daemen
Organisation:
Date: 1998
Keywords: symmetric encryption
Electronic Publication: FIPS PUB 197: the official US NIST AES standard
Description:

AES is an symmetric cryptographic algorithm used for data privacy and for authenticating the integrity of messages. AES is a symmetric algorithm because the sender and the receiver share a common secret key. Currently the best known attack against AES is to perform a brute force attack testing every possible key combination.

Attacks:

It is widely conjectured that AES running with a 128 bit key (AES-128) can be broken using a code-breaking quantum computer with 264 searches using Grover's quantum algorithm. This would be considered broken in practice by the cryptographic community.  For this reason a minimum key length of AES-192 is required to maintain a 96 bit security rating.

Note: The most conservative key length available to AES is 256-bits in length. This would offer a 128-bit security rating against a code-breaking quantum computer.  
Note: Many cryptographers have raised questions concerning the long term security of the AES cipher. See the AES wikipedia article for more information.
Citation:

US NIST, "Federal Information Processing Standards Publication 197", November 26, 2001

Related work: DES

Last Updated on Sunday, 04 January 2009 10:50
 
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