TY  - BOOK
AU  - Oppliger, Rolf
TI  - Secure Messaging with Pgp and S/Mime 
SN  - 158053161X
U1  - 005.8 
PY  - 2001///
CY  - Boston : 
PB  - Artech House, 
KW  - Electronic Mail Systems
KW  - Telecommunication Systems Security Measures
N1  - YY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/1-58053-161-X.pdf
ER  -