Answer:
Given:
Passwords are selected from 4 characters.
Character combinations are 26 lower case alphabetic characters.
Passwords attempts by adversary is at rate of 1 second.
To find:
Expected time to discover the correct password
Explanation:
Solution:
4 character combinations of 26 alphabetic characters at the rate of one attempt at every 1 second = 26 * 4 = 104
So 104 seconds is the time to discover the correct password. However this is the worst case scenario when adversary has to go through every possible combination. An average time or expected time to discover the correct password is:
13 * 4 = 52
You can also write it as 104 / 2 = 52 to discover the correct password. This is when at least half of the password attempts seem to be correct.
Answer:
Java
Explanation:
Java was created in 1981 and was marketed in 1995, it still corresponds to programming language, where objects are created from the cloning of others.
Answer:
Answer is D
Explanation:
cameras did not use disks until the late 1990s :D
edit: sorry my previous answer was wrong, I apoligize for the mishap :(