[1] KeyStore (Java Platform SE 6) ( (5/14/2013, 1:35:46 AM)) https://docs.oracle.com/javase/jp/6/api/java/security/KeyStore.html
[2] Keystore - Wikipedia, the free encyclopedia ( (5/26/2016, 1:06:03 PM)) https://en.wikipedia.org/wiki/Keystore
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