TY  - BOOK
AU  - Patel, Dhiren R.
TI  - Information security : : theory and practice 
SN  - 9788120333512
U1  - 005.8  1
PY  - 2008///
CY  - New Delhi
PB  - PHI Learning Pvt Ltd
KW  - Classical encryption methods
KW  - Information hiding : steganography
KW  - Virus and malware
ER  -