authentication code

基本解釋

The message digest (also called the message authentication code) is computed using a hash function.
消息摘要（又稱消息認(rèn)證代碼）是用散列函數(shù)計(jì)算的。
As mentioned above, there are two common technologies used to satisfy the requirement of message authentication: the Message Authentication Code and the digital signature.
正如上文所提到的，為滿足消息身份驗(yàn)證的要求，用到了兩項(xiàng)通用技術(shù)：消息身份驗(yàn)證代碼（Message Authentication Code）和數(shù)字簽名。
Forms authentication not only writes the user's name into the cookie, it adds a message authentication code (a hash formed from the cookie and a secret value that only the Web server knows).
表單驗(yàn)證不僅將用戶名寫入Cookie，它還寫入信息驗(yàn)證碼（一種來自Cookie和只有服務(wù)器知道的密值的散列形式）。

Authentication can be done via code entry or NFC (or there's WPS too).
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This increases the level of security by preventing reverse engineering of an authentication service process or preventing attacks that try to modify this code.
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Finally, the plan makes multi-factor authentication available to website owners for the cost of adding a few lines of software to their server code.
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認(rèn)證碼
Firstly, we introduce some basic concepts. Secondly, one construction of Cartesian authentication code from norm form of one class of nilpotent matrices over finite field is presented and its size parameters are computed.
文中第一部分介紹認(rèn)證碼理論的基本概念；第二部分利用有限域F_q上一類冪零陣的相似標(biāo)準(zhǔn)形，構(gòu)作了一個笛卡爾認(rèn)證碼，并計(jì)算出該碼的所有參數(shù)。