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Cryptography. Cryptography, or cryptology (from Ancient Greek: κρυπτός, romanized: kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία -logia, "study", respectively [1]), is the practice and study of techniques for secure communication in the presence of adversarial behavior. [2]
Successful key management is critical to the security of a cryptosystem. It is the more challenging side of cryptography in a sense that it involves aspects of social engineering such as system policy, user training, organizational and departmental interactions, and coordination between all of these elements, in contrast to pure mathematical ...
Key (cryptography) A key in cryptography is a piece of information, usually a string of numbers or letters that are stored in a file, which, when processed through a cryptographic algorithm, can encode or decode cryptographic data. Based on the used method, the key can be different sizes and varieties, but in all cases, the strength of the ...
Appearance. Information security, sometimes shortened to infosec, [ 1 ] is the practice of protecting information by mitigating information risks. It is part of information risk management. [ 2 ][ 3 ] It typically involves preventing or reducing the probability of unauthorized or inappropriate access to data or the unlawful use, disclosure ...
ISO/IEC 27001 is an international standard to manage information security. The standard was originally published jointly by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) in 2005, [1] revised in 2013, [2] and again most recently in 2022. [3] There are also numerous recognized ...
The Diffie–Hellman key exchange method allows two parties that have no prior knowledge of each other to jointly establish a shared secret key over an insecure channel. This key can then be used to encrypt subsequent communications using a symmetric-key cipher. Diffie–Hellman is used to secure a variety of Internet services.
Information security standards (also cyber security standards[1]) are techniques generally outlined in published materials that attempt to protect the cyber environment of a user or organization. [2] This environment includes users themselves, networks, devices, all software, processes, information in storage or transit, applications, services ...
The X.509 public key certificate illustrates crypto-agility. A public key certificate has cryptographic parameters including key type, key length, and a hash algorithm.X.509 version v.3, with key type RSA, a 1024-bit key length, and the SHA-1 hash algorithm were found by NIST to have a key length that made it vulnerable to attacks, thus prompting the transition to SHA-2.
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