This question is designed to gain more experience on symmetric encryption algorithms, encryption modes. The cryptographic library implemented by OpenSSL project will be used in this question. Using OpenSSL from the command line interface Create a new text file using a notepad or any other software, The text file contains your name(first 8 chars) and the file must be exactly 8 bytes in size only and name it “txt”. Print screen of your public ip address, repeat it twice and convert it to hexadecimal format then Create another text file and name it “key.txt” contains the doubled IP address in hexadecimal format. Encrypt the file “txt” using DES, using key.txt as a key and ECB mode of operation. The ciphertext should be in a file named “your_id.enc” and print screen your steps in details. [ Prove and explain by details that the avalanche effect is exist in DES algorithm. you don’t have check the existence of avalanche effect using different plaintext only you can use different keys to your answer, you can use at least three different keys. Note be cautions when you change the key. DES use 64 bit key but the bits number 8th ,16th,24th,………64th are not used in encryption ;you will change one bit in the other 56 bits see chapter3 in your LMS).(print all screens) Generate RSA 2048 bit private key and export it to file “pem”? Generate RSA public key from previous private key and export it to file “pem” write your id in text file and name it as “txt” and encrypt it using RSA using a generated public key and name encrypted file as “message.enc”? Re-decrypt “enc” using the your private key and name the output file “message1.txt”?

This question is designed to gain more experience on symmetric encryption algorithms, encryption modes. The cryptographic library implemented by OpenSSL project will be used in this question. Using OpenSSL from the command line interface

1. Create a new text file using a notepad or any other software, The text file contains your name(first 8 chars) and the file must be exactly 8 bytes in size only and name it “txt”.
2. Print screen of your public ip address, repeat it twice and convert it to hexadecimal format then Create another text file and name it “key.txt” contains the doubled IP address in hexadecimal format.
3. Encrypt the file “txt” using DES, using key.txt as a key and ECB mode of operation. The ciphertext should be in a file named “your_id.enc” and print screen your steps in details. [
4. Prove and explain by details that the avalanche effect is exist in DES algorithm. you don’t have check the existence of avalanche effect using different plaintext only you can use different keys to your answer, you can use at least three different keys. Note be cautions when you change the key. DES use 64 bit key but the bits number 8^th ,16^th,24^th,………64^th are not used in encryption ;you will change one bit in the other 56 bits see chapter3 in your LMS).(print all screens)
5. Generate RSA 2048 bit private key and export it to file “pem”?
6. Generate RSA public key from previous private key and export it to file “pem”
7. write your id in text file and name it as “txt” and encrypt it using RSA using a generated public key and name encrypted file as “message.enc”?
8. Re-decrypt “enc” using the your private key and name the output file “message1.txt”?