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"The future ability of quantum computers might be a decade or two away, their future ability to break public-key cryptography has important implications for the encryption of highly sensitive information today. For these applications, we must already design new public-key cryptosystems and one-way functions that are immune to quantum cryptanalysis."
ARDA, Report of the Quantum Information Science and Technology Experts Panel, 2004 -
“The current way which organisations approach security can be recognised as an underlying market failure which consists of fire fighting security problems, silo'd implementation of technologies, uncontrolled application development practices and a failure to address systemic problems. Organisations tend to deal with one problem at a time that results in the deployment of point solutions to treat singular problems. This failure is typical of an uncontrolled marketplace evolving with little or no co-ordination.”Read more...
The British Government’s Technology Strategy Board, 2008 -
"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."Read more...
Bruce Schneier, "Why Cryptography Is Harder Than It Looks", 1997
Resources Frequently asked questions Symmetric Primitives
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Facts and frequently asked questions about symmetric cryptography. Block ciphers, stream ciphers and hash functions are symmetric operations. A symmetric keyed operation is where the sender and receiver share a common key to perform encoding and decoding of a message. Examples include DES and AES. A symmetric unkeyed operation is where the sender and receiver call the same cryptographic operation on a message. For example the SHA hash function. |
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