Answer:
(a)Applications Time Stamp Events
(b)S=0.5(W-
)+, where ≤W≤+8.
Explanation:
Some applications assume that clocks always advance, so they could timestamp events under this assumption.
In our case we have the wrong timed clock, say W and the hardware clock H which is supposed to advance at a perfect rate.
We proceed to construct a software clock such that after 8 seconds we can replace the wrong timed clock with the software clock in good conditions.
Let us denote the software clock with S.
Then, S=c(W-)+ where:
=The current Time(10:27:54) and;
c is to be found.
We already know that S=+4 when W= +8,
So:
S=c(W-)+
+4=c(+8-)+
4=8c
c=0.5
We obtain the formula
S=0.5(W-)+, where ≤W≤+8.
Answer:
Rainbow table attack
Explanation:
A rainbow table attack is a type of network attack or hacking where the hacker tries to utilize a rainbow hash table to crack the passwords in a database system. A rainbow table itself is a hash function used in cryptography for saving important data in a database. Especially passwords.
In this process, sensitive data are hashed two or multiple times with the same key or with different keys so as to avoid rainbow table attack. In a rainbow table attack, the hacker simply compares the hash of the original password against hashes stored in the rainbow table and when they find a match, they then identify the password used to create the hash.
Answer:
The correct point about defensive programming is that the "program code frequently assumes that input will be valid and that algorithms will behave as expected".
Explanation:
It encourages users to revisit your website.
