This project demonstrates a simple encryption and decryption process for a 1MB file using the cryptography library in Python. The process includes generating a 1MB file, creating an encryption key, hashing the file for integrity verification, encrypting the file, and finally decrypting it.

How to Use

1. Generate 1MB File:

   • Run python file.py to create a 1MB text file.

2. Generate Encryption Key:

   • Run python key.py to generate an encryption key and store it in filekey.key.

3. Hash the 1MB File:

   • Run python hash.py to calculate the SHA-256 hash of the 1MB file and store it in hashed_file.txt.

4. Encrypt the 1MB File:

   • Run python encrypt.py to encrypt the 1MB file using the generated key.

5. Decrypt the 1MB File:

   • Run python decrypt.py to decrypt the encrypted file.

Verification of Integrity

• The project ensures data integrity by generating a hash of the 1MB file before encryption.
• After decryption, the hash of the decrypted file is compared with the original hash to verify data integrity.