Because of the known risks of the UNIX password system, the SunOS-4.0 documentation recommends that the password
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Because of the known risks of the UNIX password system, the SunOS-4.0 documentation recommends that the password ?le be removed and replaced with a publicly readable ?le called /etc/publickey. An entry in the ?le for user A consists of a user’s identi?er IDA, the user’s public key, PUa, and the corresponding private key PRa. This private key is encrypted using DES with a key derived from the user’s login password Pa. When A logs in, the system decrypts E(Pa,PRa)to obtain PRa.
(a) The system then veri?es that Pa was correctly supplied. How? (b) How can an opponent attack this system?
Related Book For
Engineering Economy
ISBN: 978-0132554909
15th edition
Authors: William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
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