Digital signatures allow messages to be as authentically sent by the origin user or software.

数字签名使初始用户和软件能够可靠地发送信息。

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Type inference helps by automatically inferring type signatures, so that the user doesn't have to provide trivial type information manually.

类型推断帮助你自动推断类型签名，所以用户不用人工提供一般的类型信息。

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Password validation is done by comparing the hash signatures of the password provided by the user with the signature stored in the database.

在检查密码时，会对比用户提供的密码的散列签名和数据库中存储的签名。

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Thumbprints, retinal scans, electronic signatures and other unique-to-user identification should add another barrier.

CNN: ASIANOW - Asiaweek

By combing through its clients' clips, the service creates signatures that allow the media companies to identify their content on user-generated video sites.

FORBES: Sinking Video Pirates

The researchers also managed to get an Android antivirus app to download and install fake virus signatures that then identified the antivirus tool as a virus and gave the user the opportunity to remove it.

FORBES: Researchers Find Flaws In Android Apps That Leave Millions Vulnerable To Password, Online Banking Credentials, And Email Data Theft