Write some Software = Cryptography

Using Java Cryptographic Architecture (JCA) and Java Cryptographic Extensions (JCE) implement the following protocol. Please refer to the lecture slides and online tutorials for completing this assignment. You may also find the following tutorial useful. [login to view URL] 1) Two entitles (Alice and Bob) generates public key pair using RSA algorithm. [Print: “Alice: Public Key: AAA” “Alice: Private Key: aaa” “Bob: Public Key: BBB” “Bob: Private Key: bbb” Where AAA, aaa, BBB, and bbb are the public and private key of Alice and Bob respectively. 2) Alice generates a DES key from a key phrase (key phase could be any text). [Print: “Alice: the DES key: xxx, where xxx is the DES key]. 3) Then, Alice encrypts the following message “Protect your network as if it would be a hotel not as if it would be a castle.” Using the DES encryption and the DES key. [Print: “Alice: Plain text: xxx, DES Key: kkk Cipher text: ccc ], where xxx is the plaintext message, kkk is the DES key and ccc is the ciphertext. 4) Alice then digitally signs the message (notice that Alice need to use her private key and MAC algorithm to do this). [Print: “Alice: Message Digest of the Plaintext using SHA-256 is ddd”, where ddd is the message digest of the plain text.] [Print: “Alice: Digitally signed message is xxx”, where xxx is the output of digital signature on the message.] 5) Finally, Alice encrypts the DES key using the public key of Bob. In a normal scenario, Alice would send the digitally signed message and the encrypted key to Bob (use comma to separate these two messages). However, in this scenario, you should print this information on the output screen as an printable output. Print some newline characters to separate this segment from the following segment. 6) Bob would verify the digital signature (notice that in this case, you need to use the public key of Alice and MAC). If the sign is valid, the prints “Bob: Message is signed by Alice!”, otherwise prints “Bob: Message is not signed by Alice!”. 7) Then, Bob decrypts the DES key using his RSA private key. [Print: “Bob: the DES key is :xxxx”, where xxx is the encrypted DES key). 8) Finally, Bob decrypts the message using DES key and prints “Bob: the message is “xxx”., where xxx is the decrypted message. Please design the appropriate classes and methods so that the design of the program is clean and reusable. Provide a tester class with “main” method that will use these classes to complete the tasks. Please properly comment your code. You should submit all the necessary source code files to run the program along with a snapshot of the test run in a zip file. Please provide a “[login to view URL]” file stating how to run your program.