TY  - BOOK
AU  - Alexander, Joseph 
TI  - Cryptography and network security
SN  - 9781788826341
U1  - 005.8 ALE 
PY  - 2019///
CY  - London : 
PB  - Ed Tech Press.
KW  - Computer security
KW  - Cryptography
KW  - Network security
ER  -