Look at this ---
file:/usr/local/java/jce1.2.1/doc/apidoc/javax/crypto/ExemptionMechanism.html#ge
tInstance(java.lang.String)

it says that --

Parameters:
mechanism - the standard name of the requested exemption mechanism. See Appendix
A in the Java Cryptography Extension API Specification & Reference for
information about standard exemption mechanism names.

But when I went to "Java Cryptography Extension API Specification & Reference"
it did not mention any standard exemption mechanism names at Appendix A