Cryptanalysis - Classical cryptanalysis

Cryptanalysis (from the Greek kryptós, "hidden", and analýein, "to loosen" or "to untie") is the study of methods for obtaining the meaning of encrypted information, without access to the secret information which is normally required to do so. Typically, this involves finding the secret key. In non-technical language, this is the practice of codebreaking or cracking the code, although these phrases a ...

Including:

• Cryptanalysis - History of cryptanalysis
• Cryptanalysis - Classical cryptanalysis
• Cryptanalysis - Modern cryptanalysis
• Cryptanalysis - The results of cryptanalysis
• Cryptanalysis - Characterising attacks
• Cryptanalysis - Prior knowledge: scenarios for cryptanalysis
• Cryptanalysis - Classifying success in cryptanalysis
• Cryptanalysis - Complexity
• Cryptanalysis - Cryptanalysis of asymmetric cryptography
• Cryptanalysis - Quantum computing applications for cryptanalysis
• Cryptanalysis - Methods of cryptanalysis

Read more here: » Cryptanalysis: Encyclopedia - Cryptanalysis

Cryptanalysis has coevolved together with cryptography, and the contest can be traced through the history of cryptography — new ciphers being designed to replace old broken designs, and new cryptanalytic techniques invented to crack the improved schemes. In practice, they are viewed as two sides of the same coin: in order to create secure cryptography, you have to design against possible cryptanalysis. Cryptanalysis - Classical cryptanalysis. Although the actual word "cryptanalysis" is relatively ...

See also:

Cryptanalysis, Cryptanalysis - History of cryptanalysis, Cryptanalysis - Classical cryptanalysis, Cryptanalysis - Modern cryptanalysis, Cryptanalysis - The results of cryptanalysis, Cryptanalysis - Characterising attacks, Cryptanalysis - Prior knowledge: scenarios for cryptanalysis, Cryptanalysis - Classifying success in cryptanalysis, Cryptanalysis - Complexity, Cryptanalysis - Cryptanalysis of asymmetric cryptography, Cryptanalysis - Quantum computing applications for cryptanalysis, Cryptanalysis - Methods of cryptanalysis

Read more here: » Cryptanalysis: Encyclopedia II - Cryptanalysis - History of cryptanalysis

Classical cryptanalysis: Frequency analysis Kasiski examination Index of coincidence Mutual Index of coincidence Symmetric algorithms: Differential cryptanalysis Linear cryptanalysis Integral cryptanalysis Statistical cryptanalysis Mod-n cryptanalysis XSL attack Slide attack Other methods: Birthday attack Man in the middle attack Brute force attack Gardening ( ...

See also:

Cryptanalysis, Cryptanalysis - History of cryptanalysis, Cryptanalysis - Classical cryptanalysis, Cryptanalysis - Modern cryptanalysis, Cryptanalysis - The results of cryptanalysis, Cryptanalysis - Characterising attacks, Cryptanalysis - Prior knowledge: scenarios for cryptanalysis, Cryptanalysis - Classifying success in cryptanalysis, Cryptanalysis - Complexity, Cryptanalysis - Cryptanalysis of asymmetric cryptography, Cryptanalysis - Quantum computing applications for cryptanalysis, Cryptanalysis - Methods of cryptanalysis

Read more here: » Cryptanalysis: Encyclopedia II - Cryptanalysis - Methods of cryptanalysis

Asymmetric cryptography (or public key cryptography) is cryptography that relies on using two keys; one private, and one public. Such ciphers invariably rely on "hard" mathematical problems as the basis of their security, so an obvious point of attack is to develop methods for solving the problem. The security of two-key cryptography depends on mathematical questions in a way that single-key cryptography generally does not, and c ...

See also:

Cryptanalysis, Cryptanalysis - History of cryptanalysis, Cryptanalysis - Classical cryptanalysis, Cryptanalysis - Modern cryptanalysis, Cryptanalysis - The results of cryptanalysis, Cryptanalysis - Characterising attacks, Cryptanalysis - Prior knowledge: scenarios for cryptanalysis, Cryptanalysis - Classifying success in cryptanalysis, Cryptanalysis - Complexity, Cryptanalysis - Cryptanalysis of asymmetric cryptography, Cryptanalysis - Quantum computing applications for cryptanalysis, Cryptanalysis - Methods of cryptanalysis

Read more here: » Cryptanalysis: Encyclopedia II - Cryptanalysis - Cryptanalysis of asymmetric cryptography

Cryptanalytic attacks vary in potency and how much of a threat they pose to real-world cryptosystems. A certificational weakness is a theoretical attack that is unlikely to be applicable in any real-world situation; the majority of results found in modern cryptanalytic research are of this type. Essentially, the practical importance of an attack is dependent on the answers to the following three questions: What knowledge and capabilities are needed as a prerequisite? How much additional secret information is deduced? How much effort is ...

See also:

Cryptanalysis, Cryptanalysis - History of cryptanalysis, Cryptanalysis - Classical cryptanalysis, Cryptanalysis - Modern cryptanalysis, Cryptanalysis - The results of cryptanalysis, Cryptanalysis - Characterising attacks, Cryptanalysis - Prior knowledge: scenarios for cryptanalysis, Cryptanalysis - Classifying success in cryptanalysis, Cryptanalysis - Complexity, Cryptanalysis - Cryptanalysis of asymmetric cryptography, Cryptanalysis - Quantum computing applications for cryptanalysis, Cryptanalysis - Methods of cryptanalysis

Read more here: » Cryptanalysis: Encyclopedia II - Cryptanalysis - Characterising attacks

Quantum computers have potential for use in cryptanalysis. Because quantum states can exist in superposition (ie, entangled), a new paradigm for computation is possible. Peter Shor of Bell Labs proved the possibility, and various teams have demonstrated one or another aspect of quantum computer engineering in the years since. Thus far, only very limited proof of possibility designs have been demonstrated. There is, at this writing, no credible prospect of an actual, usable, quantum computer. However, were a quantum computer to be built, many things would change. Parallel comput ...

See also:

Cryptanalysis, Cryptanalysis - History of cryptanalysis, Cryptanalysis - Classical cryptanalysis, Cryptanalysis - Modern cryptanalysis, Cryptanalysis - The results of cryptanalysis, Cryptanalysis - Characterising attacks, Cryptanalysis - Prior knowledge: scenarios for cryptanalysis, Cryptanalysis - Classifying success in cryptanalysis, Cryptanalysis - Complexity, Cryptanalysis - Cryptanalysis of asymmetric cryptography, Cryptanalysis - Quantum computing applications for cryptanalysis, Cryptanalysis - Methods of cryptanalysis

Read more here: » Cryptanalysis: Encyclopedia II - Cryptanalysis - Quantum computing applications for cryptanalysis