java - JDK 中的 KEYTOOL 是什么？开发人员如何使用它？

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我听说 keytool 位于 JDK/bin 文件夹中，当我们将我们的应用程序合并到 Faecbook SDK 时，它也会在 Android 应用程序中使用。所以我不知道 keytool 到底是什么？谁能帮我介绍一下keytool？以及在哪里使用它以及为什么使用它？提前致谢

Answer 1

keytool is a key and certificate management utility. It allows users to administer their own public/private key pairs and associated certificates for use in self-authentication (where the user authenticates himself/herself to other users/services) or data integrity and authentication services, using digital signatures. It also allows users to cache the public keys (in the form of certificates) of their communicating peers.

A certificate is a digitally signed statement from one entity (person, company, etc.), saying that the public key (and some other information) of some other entity has a particular value. (See Certificates.) When data is digitally signed, the signature can be verified to check the data integrity and authenticity. Integrity means that the data has not been modified or tampered with, and authenticity means the data indeed comes from whoever claims to have created and signed it.

keytool also enables users to administer secret keys used in symmetric encryption/decryption (e.g. DES).

keytool stores the keys and certificates in a keystore.

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