Refers to three things, depending on the context. A keystore can be a repository where private keys, certificates and symmetric keys can be stored. This is typically a file, but the storage can also be handled in different ways, e.g. cryptographic token or using the OS's own mechanism.
|Developed by||Sun Microsystems|
KeyStore is also a class which is part of the standard API. It is essentially a way to load, save and generally interact with one of the "physical" keystores as described above.