Attack the textbook rsa encryption scheme

Assignment Help Other Subject

Reference no: EM13516285

Question 1

Write a program to attack the Textbook RSA Encryption Scheme in order to decrypt the encrypted file key_enc.txt which contains the 128 bits AES secret key together with the initialisation vector (IV) for Question 2. You must explain and show how the attack is done. The RSA parameters are as follows:

N:
1138962637897276378307938215512222422011139335076573193725344875540991426121023228370271274859600271357256043587631029100558245044301219258717020849299280196120
04430128052142748893012310578687183850021947167608503022583720901965948811803799200406402065090559755858489087278843248937684896701137338262162804639

e: 65537

The RSA.class will read in the ciphertext stored inside key_enc.txt and decrypt it to the original plaintext. When you run the class file, make sure it is placed in the same directory with the text file.

If you get java.lang.UnsupportedClassVersionError, update your jre and jdk to the latest version. Also, make sure you run the class file with the -Dfile.encoding=UTF-8 parameter.

Question 2

Decrypt the file Q2_encrypted with AES in CBC mode with PKCS5 padding scheme. Explain how to execute the decrypted file.

Assessment Scheme

1. Report
a. Formatting & Grammar
b. Question 1 - (At most will be given, if you don't perform cryptanalysis)
i. Explanation of the attack
ii. Successful decryption
c. Question 2
i. Parameters setup
ii. Read ciphertext
iii. Decrypt file
2. Make sure your report is original or 10 marks will be deducted regardless your total marks.

Reference no: EM13516285

Questions Cloud

Briefly summarize us oil price in 2014 : Briefly summarize US OIL PRICE in 2014

Find the wavelength of the sound in the direction of motion : The car in the drawing is moving to the left at 35 m/s. The car's horn continuously emits a 2.20 × 102 Hz sound. What is the wavelength of the sound in the direction of motion of the car

What annual rate of interest did you earn : 1. One day as you were going through some old memorabilia, you discovered an old savings account in which you placed $100 twenty years ago. When you checked out the account, it currently had a balance of $320.71. What annual rate of interest d..

What is the winding density of the solenoid : A solenoid of inductance L = 50 mH has a magnetic energy U = 3 x10-4 J with a density u = 0.0042 J/m3. What is the winding density n of the solenoid

Attack the textbook rsa encryption scheme : Write a program to attack the Textbook RSA Encryption Scheme in order to decrypt the encrypted file key_enc.txt which contains the 128 bits AES secret key together with the initialisation vector

Find what is the power needed to accomplish this : A horse draws a sled horizontally across a snow-covered field. The coefficient of friction between the sled and the snow is 0.175, and the mass of the sled, what is the power needed to accomplish this

Calculated all manually with no excel formulation : Calculated all manually with no excel formulation or calculation

Calculate how much work is done by the force : A force given by F(x) = 5x3 (in N/m3) acts on a 1-kg mass moving on a frictionless surface. The mass moves from x = 3.87 m to x = 6.09 m. How much work is done by the force

Estimate how many turns are on the secondary : A transformer changes the 10,000 V power line to 120 V. If the primary coil contains 750 turns, how many turns are on the secondary

User Account

All Pages