翻訳と辞書 Words near each other ・ Random leg course ・ Random logic ・ Random Magazine ・ Random man not excluded ・ Random map ・ Random mapping ・ Random match possibility ・ Random matrix ・ Random measure ・ Random minimal spanning tree ・ Random modulation ・ Random neural network ・ Random number ・ Random number book ・ Random number generation ・ Random number generator attack ・ Random number table ・ Random optimization ・ Random oracle ・ Random orbital sander ・ Random Passage ・ Random password generator ・ Random permutation ・ Random permutation statistics ・ Random phase approximation ・ Random phase multiple access ・ Random plot generator ・ Random positioning machine ・ Random projection ・ Random Quest Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Random number generator attack ： ウィキペディア英語版 Random number generator attack The security of cryptographic systems depends on some secret data that is known to authorized persons but unknown and unpredictable to others. To achieve this unpredictability, some randomization is typically employed. Modern cryptographic protocols often require frequent generation of random quantities. Cryptographic attacks that subvert, or exploit weaknesses in, this process are known as random number generator attacks. A high quality random number generation (RNG) process is almost always required for security, and lack of quality generally provides attack vulnerabilities and so leads to lack of security, even to complete compromise, in cryptographic systems. The RNG process is particularly attractive to attackers because it is typically a single isolated hardware or software component easy to locate. If the attacker can substitute pseudo-random bits generated in a way he can predict, security is totally compromised, yet generally undetectable by any upstream test of the bits. Furthermore, such attacks require only a single access to the system that is being compromised. No data need be sent back in contrast to, say, a computer virus that steals keys and then e-mails them to some drop point. ==Human generation of random quantities== Humans generally do poorly at generating random quantities. Magicians, professional gamblers and con artists depend on the predictability of human behavior. In World War II German code clerks were instructed to select three letters at random to be the initial rotor setting for each Enigma machine message. Instead some chose predictable values like their own or a girlfriend's initials, greatly aiding allied breaking of these encryption systems. Another example is the often predictable ways computer users choose passwords (see password cracking). Nevertheless, in the specific case of playing mixed strategy games, use of human gameplay entropy for randomness generation was studied by Ran Halprin and Moni Naor.〔(【引用サイトリンク】 title=Games for Extracting Randomness )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Random number generator attack」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.