Hi, I found that org.apache.harmony.security.utils.AlgNameMapper will get information from loaded security providers and a known-mapping as well. So my quesion is: 1.Do we have to consider the influence of add or removing security providers? From the code, the AlgNameMapper will remain unchanged after it is initialized. 2.Do we have to get the information out of the security providers? Is it due to the incompleteness of the known-mapping table? Thank you. -- Leo Li China Software Development Lab, IBM