TY  - BOOK
AU  - Stallings, William 
TI  - Cryptography and network security: principles and practice 
SN  - 81-7808-605-0 
U1  - 004.6 STA  
PY  - 2002///
CY  - Pearson education asia 
PB  - Delhi 
KW  - COMPUTER NETWORK
ER  -