In Kerberos, Alice's key K A , which is shared by Alice and the KDC, is computed (on Alice's computer) as K A = /i(Alice's password). Alternatively, this could have been implemented as follows....

In Kerberos, Alice's key K_A, which is shared by Alice and the KDC, is computed (on Alice's computer) as K_A
= /i(Alice's password). Alternatively, this could have been implemented as follows. Initially, the key K_A
is randomly generated on Alice's computer. The key is stored on Alice's computer as E(K_A, K) where the key K is computed as K = h(Alice's password). The key K_A
is also stored on the KDC.

 a. What are the advantages to this alternate approach of generating and storing K_A?

b. Are there any disadvantages to computing and storing E(K_A, K)l