Pretty Good Privacyis a hybrid implementation of conventional cryptography as well as public key encryption.
1 JDK Prerrequisites
The needed version of JDK installed is Java 8 Update 151 and higher. This is to avoid a policy that only allows restricted cryptography key sizes due to US export laws.
- Java 9 and higher: The Unlimited Strength Jurisdiction Policy Files are included with Java 9 and used by default.
- Java 8 Update 161 and higher: Starting with Java 8 Update 161, Java 8 defaults to the Unlimited Strength Jurisdiction Policy.
Java 8 Update 151 and higher: Starting with Java 8 Update 151, the Unlimited Strength Jurisdiction Policy is included with Java 8 but not used by default. To enable it, you need to edit the java.security file in $JAVA_HOME/jre/lib/security (for JDK) or $JAVA_HOME/lib/security (for JRE). Uncomment (or include) the lineCopy
The policy change only takes effect after restarting the JVM.
- Before Java 8 Update 151: For Java 8 Update 144 and earlier, you need to install the Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files (available at Oracle).
The tag function script has the following grammar:
<key_secret /> !
<message /> !
|Aidentity||String||Identity of a privated key.|
|Apassword||String||Password to encrypt the passed text.|
|Ekey_secret||String||The secret word to obtain the key.|
|Emessage||String||The text that will be encrypted.|
|String||Returns a String encrypted for text passed using the key stored identified by the identity and secret provided.|