File list (Check if you may need any files):
digitalSignature
................\.classpath
................\.project
................\bin
................\...\digitalSignature
................\...\................\Provider.class
................\...\................\test.class
................\...\................\User$1.class
................\...\................\User$SendMsg.class
................\...\................\User$WaitForMsg.class
................\...\................\User.class
................\src
................\...\digitalSignature
................\...\................\Provider.java
................\...\................\test.java
................\...\................\User.java
................\test-1.txt