Dispatch riders would race across the world with padlocked briefcases, personally distributing keys to everyone who would receive messages from the bank over the next week. As business networks grew i...
The hotline between the presidents of Russia and America is secured via a onetime pad cipher.
Správné použití kvalitní šifry je velkou pomocí pro obě komunikující strany, avšak nekorektní zacházení se slabou šifrou může vyvolat velmi falešný pocit bezpečí.
A problem worthy of attackProves its worth by fighting back. Piet Hein
The nineteenth-century mathematician Leopold Kronecker said, God made the integers; all the rest is the work of man.
We would be in real trouble if everybody in GCHQ was like him, but we can tolerate a higher proportion of such people than most organizations. We put up with a number of people like him. Figure 66 Jam...
An expert problem solver must be endowed with two incompatible qualities – a restless imagination and a patient pertinacity. Howard W. Eves
This apparently innocuous observation would lead to the first great breakthrough in cryptanalysis.
Copies were passed to the cryptanalysts, who sat in little kiosks, ready to tease out the meanings of the messages. As well as supplying the emperors of Austria with invaluable intelligence, the Vienn...
The three Britons had to sit back and watch as their discoveries were rediscovered by Diffie, Hellman, Merkle, Rivest, Shamir and Adleman over the next three years.
The first microdot to be spotted by the FBI was in 1941, following a tip-off that the Americans should look for a tiny gleam from the surface of a letter, indicative of smooth film.
Alphabetic scripts tend to have between 20 and 40 characters (Russian, for example, has 36 signs, and Arabic has 28).
A mathematician is a machine for turning coffee into theorems.
Similarly, if you’re trying to prove something mathematically, it’s possible that no proof exists.
Říká se, že zkratka NSA ve skutečnosti znamená „Never Say Anything
Each distinct cipher can be considered in terms of a general encrypting method, known as the algorithm, and a key, which specifies the exact details of a particular encryption.
Cryptanalysis could not be invented until a civilization had reached a sufficiently sophisticated level of scholarship in several disciplines, including mathematics, statistics, and linguistics. The M...
What is the least number of weights that can be used on a set of scales to weigh any whole number of kilograms from 1 to 40?
The best random keys are created by harnessing natural physical processes, such as radioactivity, which is known to exhibit truly random behavior. The
The enemy of security: repetition leads to patterns, and cryptanalysts thrive on patterns.
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