4. (Polybius Cipher, 15pt) a) [3pt] Create the Polybius square for the keyword cryptography. Note: we...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
4. (Polybius Cipher, 15pt) a) [3pt] Create the Polybius square for the keyword "cryptography". Note: we make the standard assumption that i = j so we have a 25 letter alphabet. b) [3pt] Use the Polybius square from a) to encrypt your first name (stop after the first six letters if your first name is longer; it it's shorter, add some letters from your last name; replace j with i if necessary). c) [3pt] Use the Polybius square from a) to decrypt the ciphertext" 4521415115342143" d) [6pt] You've intercepted the ciphertext 35 34 33 12 14 42 34 45 43 13 54 Based on the form of the ciphertext you suspect a Polybius cipher, but when you decrypt (with the standard square) you get nonsense. The sender must have used a Polybius cipher based on some keyword. You know that the sender is lazy and suspect that the keyword is short (length 4). By bribing the secretary of the sender you find out that the keyword used to construct the Polybius square did not contain letters in the second half of the alphabet (N-Z). Decrypt the message, reconstruct the Polybius square, and find the keyword used to create it. Hint: the fact that the keyword doesn't contain the letters N-Z tells you something about the square. Use that. Some trial/error, guessing may be involved. Include a brief description of how you managed to break the cipher. 4. (Polybius Cipher, 15pt) a) [3pt] Create the Polybius square for the keyword "cryptography". Note: we make the standard assumption that i = j so we have a 25 letter alphabet. b) [3pt] Use the Polybius square from a) to encrypt your first name (stop after the first six letters if your first name is longer; it it's shorter, add some letters from your last name; replace j with i if necessary). c) [3pt] Use the Polybius square from a) to decrypt the ciphertext" 4521415115342143" d) [6pt] You've intercepted the ciphertext 35 34 33 12 14 42 34 45 43 13 54 Based on the form of the ciphertext you suspect a Polybius cipher, but when you decrypt (with the standard square) you get nonsense. The sender must have used a Polybius cipher based on some keyword. You know that the sender is lazy and suspect that the keyword is short (length 4). By bribing the secretary of the sender you find out that the keyword used to construct the Polybius square did not contain letters in the second half of the alphabet (N-Z). Decrypt the message, reconstruct the Polybius square, and find the keyword used to create it. Hint: the fact that the keyword doesn't contain the letters N-Z tells you something about the square. Use that. Some trial/error, guessing may be involved. Include a brief description of how you managed to break the cipher.
Expert Answer:
Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
Posted Date:
Students also viewed these algorithms questions
-
The following additional information is available for the Dr. Ivan and Irene Incisor family from Chapters 1-5. Ivan's grandfather died and left a portfolio of municipal bonds. In 2012, they pay Ivan...
-
This assignment requires you to complete the 2022 tax reporting for a fictional woman named Anna Smith. Question 1 T1 - step 4 - line 66 This is Anna's taxable income Answer: Question 2 T1 - step...
-
Apply Theorem 3 to calculate the matrix exponential e At for each of the matrices in Problems 35 through 40. A = 13 3 3 3 01 3 3 00 23 0002
-
Slater Co. is a U.S.-based MNC that finances all operations with debt and equity. It borrows U.S. funds at an interest rate of 11 percent per year. The long-term risk-free rate in the U.S. is 7...
-
What actions might the Fed take in the foreign exchange market? Could these actions persist in the long run? Would the Feds actions prevent interest rate parity from being achieved? Why or why not?...
-
Describe some examples of autonomous robots.
-
The Field, Brown & Snow partnership was begun with investments by the partners as follows: Field, $ 131,250; Brown, $ 165,000; and Snow, $ 153,750. The operations did not go well, and the partners...
-
3. Given Right Triangle. Side a is 4.5 cm. Side c is 6.5 cm. Find another side and angles of the triangle. Sketch the diagram. 4. Given Force 34.0 N SE direction under angle 55 above horizontal. Find...
-
Consider the following Balance Sheet (in thousands): Cash $74 Short-term investment $147 Accounts receivable $727 Inventory $27 Long-term Investments $125 Net property, plant, and equipment $81 Notes...
-
Interest rate risk and bond price changes Fidelity Music Inc. has an older high-yield bond (i.e., junk bond) issue and a more recent investment grade bond issue, both with $1,000 par values....
-
The dollar cost of debt for Coval Consulting, a U.S. research firm, is 7.6%. The firm faces a tax rate of 30% on all income, no matter where it is earned. Managers in the firm need to know its yen...
-
Eagletrons current stock price is $10. Suppose that over the current year, the stock price will either increase by 102% or decrease by 56%. Also, the risk-free rate is 25% (EAR). a. What is the value...
-
Nile Builders Ltd. is entering into a one-year overhaul and remodeling project. This will have a limiting effect on earnings during that time, but when completed, it should allow the company to enjoy...
-
Suppose the interest on Russian government bonds is 7.9%, and the current exchange rate is 28.6 rubles per dollar. If the forward exchange rate is 29.1 rubles per dollar, and the current U.S....
-
If a company sends out invitations to media sources to attend a special, live gathering where the company will introduce its new CEO, what PR tool is the company using? Select one: a. public forum b....
-
In the figure, two loudspeakers, separated by a distance of d1 = 2.63 m, are in phase. Assume the amplitudes of the sound from the speakers are approximately the same at the position of a listener,...
-
Sherry Hopson owns a retail family clothing store. Her store is located at 4321 Circle Drive, Houston, TX 77001. Her employer identification number is 95- 1234321 and her Social Security number is...
-
Diego, age 28, married Dolores, age 27, in 2012. Their salaries for the year amounted to $46,479 and they had interest income of $3,500. Diego and Dolores' deductions for adjusted gross income...
-
The following additional information is available for the Dr. Ivan and Irene Incisor family. The Incisors own a rental beach house in Hawaii. The beach house was rented for the full year during 2012...
-
Express the potential and kinetic energies of an \(n\)-degree-of-freedom system, using matrix notation.
-
Why is the mass matrix \([\mathrm{m}]\) always positive definite?
-
Is the stiffness matrix \([k]\) always positive definite? Why?
Study smarter with the SolutionInn App