A network of five nodes is using symmetrical keys to securely transmit dat
a. How many new keys are required to re-establish secure communications to all nodes in the event
there is a key compromise?
A.
5
5
QUESTION 728
What is the effective key size of DES?
56 bits
B.
10
10 not
64 bits
C.
20
128 bits
D.
25
1024 bits
B.
10
10 not
64 bits
A.
5
5
QUESTION 728
What is the effective key size of DES?
56 bits
A.
5
5
QUESTION 728
What is the effective key size of DES?
56 bits
B.
10
10 not
64 bits
C.
20
128 bits
D.
25
1024 bits
Explanation:
Per Sybex CISSP Study Guide 3rd Edition (page #314) total # of symmetrical keys needed is expressed
as: [number of participants * (number of participants-1)]/2 s/b