9.11 Because of the known risks of the UNIX password system, the SunOS-4.0 documentation recommends that the password file be removed and replaced with a publicly readable file called /etc/publickey. An entry in the file for user A consists of a user's identifier , the user's public key, , and the corresponding private key .This private key is encrypted using DES with a key derived from the user's login password.When A logs in, the system decrypts to obtain . a. The system then verifies that was correctly supplied. How? b. How can an opponent attack this system? | |
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