翻訳と辞書 Words near each other ・ Key schedule ・ Key selection vector ・ Key Sequenced Data Set ・ Key server ・ Key server (cryptographic) ・ Key signature ・ Key signature (cryptography) ・ Key signature names and translations ・ Key signing party ・ Key silverside ・ Key size ・ Key Skills Qualification ・ Key Sounds Label ・ Key Sounds Label discography ・ Key space ・ Key space (cryptography) ・ Key square ・ Key Stage ・ Key Stage 1 ・ Key Stage 2 ・ Key Stage 3 ・ Key Stage 4 ・ Key Stage 5 ・ Key stretching ・ Key switch ・ Key System ・ Key system ・ Key tags ・ Key the Metal Idol ・ Key to Harmony 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 Key space (cryptography) ： ウィキペディア英語版 Key space (cryptography) In cryptography, an algorithm's key space refers to the set of all possible keys that can be used to generate a key. ==Description== To prevent an adversary from using a brute-force attack to find the key used to encrypt a message, the key space is usually designed to be large enough to make such a search infeasible. On average, half the key space must be searched to find the solution.〔(【引用サイトリンク】title=Flash Card Machine )〕 Another desirable attribute is that the key must be selected truly randomly from all possible key permutations. Should this not be the case, and the attacker is able to determine some factor that may influence how the key was selected, the search space (and hence also the search time) can be significantly reduced. Humans do not select passwords randomly, therefore attackers frequently try a dictionary attack before a brute force attack, as this approach can often produce the correct answer in far less time than a systematic brute force search of all possible character combinations. 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「Key space (cryptography)」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.