What is the expected time to discover the correct password

Assignment Help Basic Computer Science

Reference no: EM131211945

Assume that passwords are selected from four-character combinations of 26 alphabetic characters. Assume that an adversary is able to attempt passwords at a rate of one per second.

a. Assuming no feedback to the adversary until each attempt has been completed, what is the expected time to discover the correct password?

b. Assuming feedback to the adversary flagging an error as each incorrect character is entered, what is the expected time to discover the correct password?

Reference no: EM131211945

Questions Cloud

How can an opponent attack this system : 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

Describe the significance of the selected category : Describe the selected content and explain the significance of the selected category across all of the religions studied. Show in what ways the category is significant for each religion.

Tendency for it to move to its equilibrium level : If a price is not an equilibrium price, there is a tendency for it to move to its equilibrium level. Regardless of whether the price is to high or to low to begin with, the adjustment process will increase the quantity of the good purchased. 'Expl..

Use of the 95 printable ascii characters : How long will it take to test exhaustively all possible passwords on a UNIX system?

What is the expected time to discover the correct password : Assume that passwords are selected from four-character combinations of 26 alphabetic characters. Assume that an adversary is able to attempt passwords at a rate of one per second.

What is the present value of the payments : My newest book is being considered by a publisher offering me a $100,000 advance today, plus $50,000 at the end of each of the next 2 years. What is the present value of the payments from the publisher, given my rate of discount is 2%

Demand and supply curves for t-shirts in touristtown : The demand and supply curves for T-shirts in Touristtown, U.S.A., are given by the following equations.

A true reflection of the actual security of the system : Unfortunately, this is not a true reflection of the actual security of the system. Explain the problem.

Purchasing decisions of households : Consider an economic model designed to analyze the purchasing decisions of households. An assumption that a household chooses between only two goods would be an example of a

User Account

All Pages