In order to setup, maven4 and jdk8 are requred.
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Built project (at same directory with pom.xml)
mvn package
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Run application (at target file)
2.1. Generate keypair
java -jar keypair-1.0.jar -s generate -out key.out -key loremimpsum
2.2. Validate keypair
java -jar keypair-1.0.jar -s validate -in key.out -out result.out