Project-X

BlockChain Based Election System +/ Encrypted Data Storage System

Crypto Structure:

1. Genesis Block is Made.
2. New Block is made when data insertion in blockchain is required.
3. New Block has Previous Hash,Previous Encrypted Hash,Previous AES Key data.
4. New Block Encrypts itself with a random 256Bit AES Key.
5. New Block exports its AES Key and Nonce to the next New Block.
6. Next Block Repeats the same.
7. Top Block Is added in the End of Blockchain. it secures the last AES Key with 4096 Bit RSA Encryption.
8. Blockchain is exported to a file as text data (list of hex data).

Crypto Specifications :

1. AES - EAX Mode - 256 Bit Key.
2. RSA - 4096 Bit Key Pair.
3. PKCS1_OAEP with RSA.
4. OS library Random Number Generator (os.urandom()) / optionally Crypto.Random can be used.
5. SHA 256 .

Working :

This Example System (Prototype) works by encrypting each block data with AES 256Bit Key and storing that key in the next block. Each Data Block has Information about previous block, encryption keys, hashes, and self storage data.

The Top Block (at the end of the blockchain) is secured with RSA Encrypted last Data blocks AES Key . So, we need the private key to unlock the top block, then we can get prevous key, then decrypt prvious block data, which has key of last block ... over and over again Till we get to genesis block.

Data Integrity :

Testing the integrity of this system using OPENSSL and Hashlib on Python ( SHA256 ) shows that once file is encrypted -> stored -> decrypted , the hashes are the same, meaning integrity is 100% .

Requirements :

1. Python 3.x
2. pycryptodome or pycryptodomex (PyCrypto will work, but NOT RECOMMENDED).
3. termcolor (to make it look awesome).

Installation :

pip install pycryptodome

pip install termcolor

Usage :

Generating New Keys :

Generate New RSA Keys when using this.

python3 Keygen.py

Election System :

1. To use Election System, Modify the ElectionChoices.json File as per Requirement
2. Run ElectionExample.py using:

python3 ElectionExample.py

3. Logs will be Exported to default file named "Election.txt" (change name in ResultCounter file too if you change output file here)
4. To See Election Results, Run ResultCounter.py using:

python3 ResultCounter.py

5. Results will be displayed.

Data Storage System :

1. Edit Filename of INPUT_FILE in Encryptor.py
2. Modify file if you want to (change chunk size using split() method if required)
3. Run Encryptor.py using :

python3 Encryptor.py

4. OutputFile will be generated. Default name : EncryptedBlockChain.py
5. Run NewDecryptor.py using :

python3 NewDecryptor.py

6. Additionally, if file is too large or you want to see data being decrypted, run OldDecryptor.py using:

python3 OldDecryptor.py

7. Out File will be generated, also decrypted data will be displayed!

Future :

1. No idea.
2. Can be used to store data.
3. Example Election Idea sounds like a lot of Fun.