September 1, 2011
What, you too? Part 1
PlayA was a Dutch cryptographer who created a set of 6 rules for a certain kind of system. The 2nd of his set of 6 remained famous and relevant and was named after him.
B was an American mathematician, cryptographer, electrical engineer and all-round genius who, almost 100 years after A, formulated a variant of the same principle. This was in turn, named after A although they both largely mean the same! B was, of course, an incredibly prolific genius whose work, many believe, created the field of information theory and his papers are considered the most important papers of the 20th century. (consequently, B has featured on Boiledbeans _many_ times. So this is not a dupe :P)
Another interesting (unrelated) coincidence around B was with C. B proved a certain theorem in 1949 that is fundamental to the world of information theory. Unbeknownst to B, C - who was a Swedish-born American – had pretty much proved the same thing almost 20 years before. Funnily enough, almost half-a-dozen people independently proved this over time. But, by and large, the theorem is credit to both B and C.
Identify A, B and C for 1 point. No part points. Pseudo-bonus points for naming the set of 6 rules, the maxim, and the theorem :)
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Answer:
A – Auguste Kerckhoffs
B – Claude Shanon
C – Harry Nyquist
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B- Claude E Shannon
C- Warren Weaver
B = Claude Shannon
C = Harry Nyquist
The system should be, if not theoretically unbreakable, unbreakable in practice.
The design of a system should not require secrecy and compromise of the system should not inconvenience the correspondents (Kerckhoffs’ principle).
The key should be memorable without notes and should be easily changeable
The cryptograms should be transmittable by telegraph
The apparatus or documents should be portable and operable by a single person
The system should be easy, neither requiring knowledge of a long list of rules nor involving mental strain
B – Claude Shannon
C – Harry Nyquist
B – Claude Elwood Shannon
C – Harry Nyquist
1) The system should be, if not theoretically unbreakable, unbreakable in practice.
2) The design of a system should not require secrecy and compromise of the system should not inconvenience the correspondents (Kerckhoffs’ principle).
3) The key should be memorable without notes and should be easily changeable
4) The cryptograms should be transmittable by telegraph
5) The apparatus or documents should be portable and operable by a single person
6) The system should be easy, neither requiring knowledge of a long list of rules nor involving mental strain
Kerckhoffs’ principle was reformulated by Claude Shannon as “The enemy knows the system.”
Theorem : “A Mathematical Theory of Communication”
B – Claude Shannon
C – Harry Nyquist
6 principles of designing ciphers
“the enemy knows the system”
the sampling theorem
B: Claude Shannon
C: Harry Nyquist
“six principles of practical cipher design”
“Kerckhoffs’ principle”
“Nyquist–Shannon sampling theorem”
B. Claude Shannon
C. Harry Nyquist
B-Claude Shannon
C-Harry Nyquist
B: CLaude Shannon
C: Harry Nyquist
Nyquist–Shannon sampling theorem
B-Claude Shannon
C-Harry Nyquist
B – Claude Shannon
C – Harry Nyquist
Now, for the pseudo bonus points,
Kerckhoffs’ principles
Shannon’s maxim
Nyquist-Shannon Sampling theorem
b: claude shannon
c: norbert weiner
B. Claude Shannon
C. Harry Nyquist
Kerckhoff’s principle, Shannon’s maxim and the Nyquist-Shannon sampling theorem.
B – Claude Shannon
C – Harry Nyquist
B – Claude Shannon
C – Harry Nyquist
B is Claude Shannon
C is Harry Nyquist
Six rules are: The system should be, if not theoretically unbreakable, unbreakable in practice.
The design of a system should not require secrecy and compromise of the system should not inconvenience the correspondents (Kerckhoffs’ principle).
The key should be memorable without notes and should be easily changeable
The cryptograms should be transmittable by telegraph
The apparatus or documents should be portable and operable by a single person
The system should be easy, neither requiring knowledge of a long list of rules nor involving mental strain
Maxim: The enemy knows the system.
Theorem: Nyquist Shannon sampling theorem
B=Claude Shannon
C=Harry Nyquist
Set of 6 Rules:Kerckhoffs’ 6 principles of practical cipher design
Maxim: Shannon’s Maxim
Theorem: Nyquist–Shannon sampling theorem
B : Claude Shannon
C : Harry Nyquist
Set of 6 rules : Kerckhoffs’s Principle
Maxim : Shannon’s maxim
Theorem : Nyquist–Shannon sampling theorem
since it was also discovered independently by E. T. Whittaker, by Vladimir Kotelnikov, and by others, it is also known as Nyquist–Shannon–Kotelnikov, Whittaker–Shannon–Kotelnikov, Whittaker–Nyquist–Kotelnikov–Shannon, WKS, etc., sampling theorem, as well as the Cardinal Theorem of Interpolation Theory.
Blame AutoRaja
B-Claude Shannon
C-Harry Nyquist
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le credit Rachat de credit
B- Claude Shannon
C- Harry Nyquist
Millitary Cryptography
Shannon’s maxim
Nyquist–Shannon sampling theorem
B) Claude Shannon
C) Harry Nyquist
Kerchoffs principle which states that “The enemy knows the system.”
Claude Shannon was B.
Nyquist was C.
B- Claude Shannon
C- Harry Nyquist
B: Claude Shannon
C: Harry Nyquist
B – Claude Shanon
C – Harry Nyquist
Name of the rule – Kerckhoffs Principle
B: Claude Shannon
C: Harry Nyquist