One of the disadvantages of symmetric key encryption is key management. For instance, if there are 10 people that wish to exchange data with each other, but maintain confidentiality at the same time, how many keys must be issued?
A) 1000
B) 10
C) 1
D) 45

Question

Quizplus · Accepted Answer

The formula n (n-1)/2 is used for this calculation. In this case n = 10. Therefore 10 x 9 = 90 then divided by 2 = 45.

One of the Disadvantages of Symmetric Key Encryption Is Key