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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Knowledge-based authentication ： ウィキペディア英語版 Knowledge-based authentication Knowledge-based authentication, commonly referred to as KBA, is a method of authentication which seeks to prove the identity of someone accessing a service, such as a financial institution or website. As the name suggests, KBA requires the knowledge of private information of the individual to prove that the person providing the identity information is the owner of the identity. There are two types of KBA: "static KBA", which is based on a pre-agreed set of "shared secrets"; and "dynamic KBA", which is based on questions generated from a wider base of personal information. == Static KBA (Shared Secrets) == Static KBA, also referred to as "shared secrets" or "shared secret questions", is commonly used by banks, financial services companies and e-mail providers to prove the identity of the customer before allowing account access, or as a fall-back if the user forgets their password. At the point of initial contact with a customer, a business using static KBA must collect the information to be shared between the provider and customer, most commonly the question(s) and corresponding answer(s). This data must then be stored, only to be retrieved when the customer comes back to access the account. The weakness of static KBA was demonstrated in an incident in 2008 where unauthorised access was gained to the e-mail account of former Alaska Governor Sarah Palin. The Yahoo! account's password could be reset using shared secret questions, including "where did you meet your spouse?", along with the date of birth and zip code of the former governor, to which answers were easily available online. Some identity verification providers have recently introduced secret sounds and/or secret pictures in an effort to help secure sites and information. These tactics require the same methods of data storage and retrieval as secret questions. 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「Knowledge-based authentication」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.