TY  - GEN
AU  - Stallings, William
AU  - William Stallings
TI  - Cryptography and network security : principles and practice
SN  - 9788131761663
U1  - 005.8 
PY  - 2011///
CY  - New Delhi
PB  - Pearson education
KW  - Computer networks--Security measures
ER  -