TY  - GEN
AU  - 
AU  - 
ED  - 
ED  - 
ED  - 
TI  - A Classical introduction to cryptography exercise book
SN  - 9788184893175
U1  - 005.8 
PY  - 2010///
CY  - New York
PB  - Springer
KW  - 
ER  -