What is Java Keytool? I heard that Java Keytool is nice tool to generate keys and manage certificates.

Java Keytool is a key and certificate management tool included in the Java package provided by Oracle. It can be used to manage a keystore (database) of cryptographic keys, X.509 certificate chains, and trusted certificates.

Java 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.

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

Java Keytool stores the keys and certificates in a keystore.

⇒ How to Find the Java Keytool on Windows

⇐ Introduction to Java Keytool

⇑ Introduction to Java Keytool

⇑⇑ Java Keytool: Certificate Management Tool