00592nam a22001931a 4500 1/18137 011120s1993 enk 1 0 eng d 1855542013 18676 DLC GR-PeUP 658.4΄78 20 DE Devargas, Mario. Network security / Mario Devargas Manchester : NCC Blackwell, 1993 152 p. ; 24 cm. Includes index Computer security. Computer networks Security measures. INST UNIPILB MAIN 20040709 658.4΄78 20 DE 00137626 00137626 LOAN 0 1