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The contemporary national legal systems are generally based on one of four basic systems : civil law , common law , statutory law , religious law or combinations of these. However, the legal system of each country is shaped by its unique history and so incorporates individual variations. Both civil also known as Roman and common law systems can be considered the most widespread in the world: civil law because it is the most widespread by landmass and by population overall, and common law because it is employed by the greatest number of people compared to any single civil law system. The source of law that is recognized as authoritative is codifications in a constitution or statute passed by legislature , to amend a code. While the concept of codification dates back to the Code of Hammurabi in Babylon ca. AD This was an extensive reform of the law in the Byzantine Empire , bringing it together into codified documents. Civil law was also partly influenced by religious laws such as Canon law and Islamic law. Only legislative enactments rather than legal precedents , as in common law are considered legally binding. Scholars of comparative law and economists promoting the legal origins theory usually subdivide civil law into four distinct groups:.

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The general idea is older than my writing. Wikipedia points out that in The CodebreakersDavid Kahn writes :.

Legal Systems Of The English Legal System

Few false ideas have more firmly gripped the minds of so many intelligent men than the one that, if they just tried, they could invent a cipher that no one could break. The idea is even older.

"Schneier's Law"

Back inCharles Babbage wrote :. One of the most singular characteristics of the art of deciphering is the strong conviction possessed by every person, even moderately acquainted with it, that he is able to construct a cipher which nobody else can decipher. What is hard is creating an algorithm that no one else can break, even after years of analysis.

And the only way to prove that is to subject the algorithm to years of analysis by the best cryptographers around. Anyone can invent a security system that he himself cannot break. Abstract : People tend please click for source hold overly favorable views of their abilities in many social and intellectual domains.

The authors suggest that this overestimation occurs, in part, because people who are unskilled in these domains suffer a dual burden: Not only do these people reach erroneous conclusions and make unfortunate choices, but their incompetence robs them of the metacognitive ability to realize it. Across 4 studies, the authors found that participants scoring in the bottom quartile on tests of humor, grammar, and logic grossly overestimated their test performance and ability.

Although their test scores put them in the source percentile, they estimated themselves to be in the 62nd. Several analyses linked Legal Systems Of The English Legal System miscalibration to deficits in metacognitive skill, or the capacity to distinguish accuracy from error.

Legal Systems Of The English Legal System

Paradoxically, improving the skills of participants, and thus increasing their metacognitive competence, helped them recognize the limitations of their abilities. Tags: academic paperscryptographyencryptionSchneier's Law. A simple pseudorandom number stream was added to the plaintext stream to create ciphertext. This would seemingly thwart any frequency analysis of the ciphertext, and would be uncrackable even to the most resourceful Government intelligence agencies. I felt so smug about my achievement. So cock-sure.

Legal Systems Of The English Legal System

Years later, I discovered this same scheme in several introductory cryptography texts and tutorial papers. How nice. Other cryptographers had thought of the same scheme. Unfortunately, the scheme was presented as a simple homework assignment on how to use elementary cryptanalytic techniques to trivially crack it.

So much for my brilliant scheme. He said he would never trust an encryption algorithm designed by someone who had not earned their bones by first spending a lot of time cracking codes. That did make a lot of sense. I observed that practically no one in the commercial world of cryptography qualified under this criterion. This sort of hard-earned humility is, I believe, the hallmark of a competent cryptographer of which Zimmerman is of course an excellent example.

Worse than that. Most cryptography or security systems that people Legal Systems Of The English Legal System, novices any way build that they think is unbreakable could probably be broken by themselves if someone else had presented it to them. Reminds me of the joke about protecting yourself in bear attacks and only having to outrun your link buddy… addon until you realize that Carl Lewis decided to pick here campsite right next to yours. The odd thing check this out is those systems that are cryptographicaly secure, have the illusion of being simple. For instance the One Time Pad is a very simple system from the point of encryption or decryption ie add bit by bit.

However the hard part is always there, in the case of the OTP it has simply been moved to the key handling and key genneration. In many ways this is true of all cipher systems we use simple primatives that are relativly trivial to break, but when put together the right way the trivial nature of each operation inherits strenght from all the previous trivial steps.]

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