SophiaPretty

(5)

$14/per page/Negotiable

About SophiaPretty

Levels Tought:
Elementary,Middle School,High School,College,University,PHD

Expertise:
Accounting,Algebra See all
Accounting,Algebra,Applied Sciences,Architecture and Design,Art & Design,Biology,Business & Finance,Calculus,Chemistry,Communications,Computer Science,Economics,Engineering,English,Environmental science,Essay writing Hide all
Teaching Since: Jul 2017
Last Sign in: 304 Weeks Ago, 2 Days Ago
Questions Answered: 15833
Tutorials Posted: 15827

Education

  • MBA,PHD, Juris Doctor
    Strayer,Devery,Harvard University
    Mar-1995 - Mar-2002

Experience

  • Manager Planning
    WalMart
    Mar-2001 - Feb-2009

Category > Computer Science Posted 13 Dec 2017 My Price 6.00

dictionary of n potential passwords and obtains

An attacker has a dictionary of n potential passwords and obtains a password file with m entries, where each entry is of the form (user name, F(user password, salt), salt). The salt is of k bits and no two entries have the same salt. Suppose the attacker knows that at least one user in the system uses a password in the dictionary. Then, in the worst case, how many times does the attacker have to calculate F before he can find out a userâs password?

(a) nm

(b) 2^kn

(c) 2^km

(d) 2^knm

(e) none of the above

What is the answer if the attacker doesnât know the salt value for each user?

Answers

SophiaPretty
(5)
Status NEW Posted 13 Dec 2017 12:12 PM My Price 6.00

-----------  ----------- H-----------ell-----------o S-----------ir/-----------Mad-----------am ----------- Th-----------ank----------- yo-----------u f-----------or -----------you-----------r i-----------nte-----------res-----------t a-----------nd -----------buy-----------ing----------- my----------- po-----------ste-----------d s-----------olu-----------tio-----------n. -----------Ple-----------ase----------- pi-----------ng -----------me -----------on -----------cha-----------t I----------- am----------- on-----------lin-----------e o-----------r i-----------nbo-----------x m-----------e a----------- me-----------ssa-----------ge -----------I w-----------ill----------- be----------- qu-----------ick-----------ly

Not Rated(0)