Ethical hacking task in C, Cryptography, simple task

Job ID: 37178252

Budget: $30 – $250 USD

Hello,
I have few tasks of:
1. cipher (encryption / decryption)
2. shadow password cracking using JOHN
3. TCP IP server,
4. CA and trust chain

Related categories: C Programming Computer Security Cryptography C++ Programming Certified Ethical Hacking