Computer Network Security

In World War II, the German’s usually used 10 cables on the stecker, only five different rotors were in general use, one reflector was in common use, and the reflector and five rotors were known to the Allies.

a. Under these restrictions, show that there are only about 277  possible Enigma keys.

Don't use plagiarized sources. Get Your Custom Essay on
Computer Network Security
Just from $13/Page
Order Essay

b. Show that if we ignore the stecker, under these restrictions there are fewer than 230   settings.

According to the text, random numbers used in cryptography must be unpredictable.

a. Why are statistically random numbers (which are often used in simulations) not sufficient for cryptographic applications?

b. Suppose that the keystream generated by a stream cipher is predictable in the sense that if you are given n keystream bits, you can determine all subsequent keystream bits. Is this a practical security concern? Why or why not?

Place Order
Grab A 14% Discount on This Paper
Pages (550 words)
Approximate price: -
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Try it now!

Grab A 14% Discount on This Paper

Total price:
$0.00

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.