hello, Thanks Mr.Peter Gutmann and Aram Perez for helping me out test my BER/DER Encoding.. I have another doubt....Is there a standard Tag for Negative Numbers in ASN.1 and in general can some one help me out on encoding Negative Integers. Thanks Chandar Send FREE April Fool's Greetings to your friends! http://www.whowhere.lycos.com/redirects/American_Greetings.rdct