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In computer security, a reflection attack is a method of attacking a challenge-response authentication system that uses the same protocol in both directions. That is, the same challenge-response protocol is used by each side to authenticate the other side. The essential idea of the attack is to trick the target into providing the answer to its own challenge.〔''Computer Networks'' by Andrew S. Tanenbaum, 4th edition, ISBN 0-13-038488-7, pages 787-790.〕 == Attack == The general attack outline is as follows: # The attacker initiates a connection to a target. # The target attempts to authenticate the attacker by sending it a challenge. # The attacker opens another connection to the target, and sends the target this challenge as its own. # The target responds to the challenge. # The attacker sends that response back to the target on the original connection. If the authentication protocol is not carefully designed, the target will accept that response as valid, thereby leaving the attacker with one fully authenticated channel connection (the other one is simply abandoned). 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「Reflection attack」の詳細全文を読む スポンサード リンク
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