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problem1 distinguish between a modulo and a traditional symmetric-key cipher2 explain why modem block ciphers are
problem1 a post office sells only 39-can and 15-cent stamps find the number of stamps a customer needs to buy to put
problem1 define a matrix what is a row matrix what is a column matrix what is a square matrix what type of matrix has a
problem1 define congruence and compare with equality2 define a residue class and a least residue3 what is the
problem1 what is a linear diophantine equation of two variables how many solutions can such an equation have how can
problem1 distinguish between z and zbdquo which set can have negative integers flow can we map an integer in z to an
problem1 show how ike reacts to the replay attack in the quick mode that is show how ike responds to an attacker that
problem1 show how ike reacts to the replay attack in the main mode that is show how ike responds to an attacker that
problem1 compare the digital signature method in the main and aggressive modes how much compromise is made in
problem1 compare the preshared-key methods in the main mode and aggressive modes how much compromise is made in the
problem1 a host receives an authenticated packet with the sequence number 181 the replay window spans from 200 to 263
problem1 define ike and explain why it is needed in ip sec2 list phases of ike and the goal of each phase3 define
problem1 define security association sa and explain its purpose2 define sad and explain its relation to security
problem1 distinguish between two modes of ip sec2 define all and the security services it provides3 define esp and the
problem1 in a trivial not secure key exchange p 53 find an appropriate value for g2 in station-to-station protocol
problem1 why do you think we need only one timestamp in kerberos instead of four notices as in needham-schroeder or
problemin the needham-schroeder protocol how is alice authenticated by the kdc how is bob authenticated by the kdc how
problem1 define a certification authority ca and its relation to public-key cryptography2 define the x509
problem1 define the diffie-hellman protocol and its purpose2 define the man-in-the-middle attack3 define the n action
problem1 list the duties of a kdc2 define a session key and show how a icdc can create a session key between alice and
problem1 in the fiat-shamir protocol what is the probability that a dishonest claimant correctly responds to the
problem1 for p 683 q 811 and v 157 show three rounds of the guillou-quisquater protocol by calculating the values
problemwe discussed fixed and one-time passwords as two extremes what about frequently changed passwords how do you
problem1 define a dictionary attack and how it can he prevented2 distinguish between challenge-response and
problem1 what are some advantages and disadvantages of using long passwords2 explain the general idea behind