Task 3, 4: Use C# to build UI for task 3, 4

Required:
+) Separation Encryption function and Decryption function (using switch case), Key generation

1. Key generation
   Publickey, Privae Key;
   Save to file s (ber, pem);
2. Encryption
   +) Plaintext:
   • Support Vietnamese (UTF-8)
   • Input from screen or from file (using switch case and arguments in C++/C# in terminal or UI) +) Secret key/public key
   • The keys load from files (for both two functions using arguments in C++/C# in terminal or UI)
   • The public key: >= 3072 bits
3. Decryption
   +) Ciphertext:
   • Input from screen or from file (using switch case and arguments in C++/C# in terminal or UI)
     +) Secret key/public key
   • The keys load from files (for both two functions and arguments in C++/C# in terminal or UI)
   • The public key: >= 3072 bits

+) OS platforms

• Your code can compile on both Windows and Linux;
  +) Encryption Padding using OAEP;
  +) Performance
• Report your hardware resources
• Report computation performance for all operations on both Windows and Linux with different input size

Required:

+) Separation the key generation, signing and the verify functions (using switch case)\

1. Key generation Publickey, Privae Key; Save to file s (ber, pem);

2. signing function

   • May adopt library or direct compute from formulas.
   • Deploy directly from formulas will get 15/100 bonus points.
     +) Message to sign
   • Input from file or screen
   • Support Vietnamese (using UTF-8)
     +) secret key
   • Input from file

3. Verify function +) Message and signature

   • Input from files
   • Support Vietnamese (using UTF-8)
     +) public key key
   • Input from file

4. ECC curve: should select from standard curves
   +) Secret key/public key

   • The keys load from files (for both two functions and arguments in C++/C# in terminal or UI)
   • The public key: >= 256 bits
     +) OS platforms

• Your code can compile on both Windows and Linux;
  +) Performance
• Report your hardware resources
• Report computation performance for all operations on both Windows and Linux with different input size;