I’m trying to implement authentication using BCrypt, in my Play 2.1. Java application, but I’m getting Invalid salt version exception when I’m trying to authenticate the user. This is my stack trace I’m using following maven repository: http://mvnrepository.com/artifact/org.mindrot/jbcrypt/0.3m My code is based on the documentation, thus For saving the password (I’m also checking the password for being null) For checking