Data Encryption Architecture

2.1 What is Data Encryption?

Data encryption involves transforming readable data into an encoded format that can only be read or processed by authorized individuals or systems.

2.2 Types of Encryption

• Symmetric Encryption: Uses a single key for both encryption and decryption.
• Asymmetric Encryption: Uses a pair of keys (public and private) for encryption and decryption.

3.1 Common Algorithms

• AES (Advanced Encryption Standard)
• RSA (Rivest-Shamir-Adleman)
• Blowfish
• Twofish

3.2 Example of AES Encryption

import base64
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad, unpad

# Encryption
def encrypt(plain_text, key):
    cipher = AES.new(key, AES.MODE_CBC)
    ct_bytes = cipher.encrypt(pad(plain_text.encode(), AES.block_size))
    return base64.b64encode(cipher.iv + ct_bytes).decode()

# Usage
key = b'Sixteen byte key'  # Must be 16, 24, or 32 bytes long
encrypted = encrypt("Hello, World!", key)
print("Encrypted:", encrypted)
            

4.1 Step-by-Step Flowchart

graph TD;
    A[Start] --> B{Choose Encryption Type};
    B -->|Symmetric| C[AES / Blowfish];
    B -->|Asymmetric| D[RSA];
    C --> E[Generate Key];
    D --> E;
    E --> F[Encrypt Data];
    F --> G[Store/Transmit Encrypted Data];
    G --> H[End];
            

5.1 Key Management

Ensure that encryption keys are stored securely and rotated regularly.

5.2 Use Strong Algorithms

Always opt for established encryption standards (e.g., AES with a 256-bit key).

5.3 Regular Audits

Conduct regular security audits to ensure the effectiveness of encryption measures.