how to print/check encrypted data in servlet or in servlet header

[sagar]

hello everyone,
i have one project in which user login data is getting encrypted first
then it send to servlet in header. In servlet it is using bean/
interface to decrypte data from header.
I want to known how can i view or display that encrypted data or
decrypted data.
and how can i add some additional data to header when i click submit
button.

Please help me its Urgent

Thanks & Regards
Sagar Khobragade