Learn How to Implement Cryptography Encryption in Python 🔐

Hi guys,

In this video, I've explained Encryption Algorithm.

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Encryption is the process of encoding the data in which the plain text is converted into the cipher text and a data is encrypted with a key. After that we decrypted the data in which the cipher text is converted into the plain text (original data) and it requires a key to decrypt the data which is used for the encryption. Encryption helps to protect the sensitive data and communication between client and server from an attacker or an unauthorized person. When we encrypt the data, it is not in a readable format. We have to decrypt the data to read it by using the secret key and it prevents from an unauthorized access.

We have used two encryption algorithms:
1. Advanced Encryption Standard (AES)
2. XOR Algorithm

Install Libraries:
pip install pyaes
pip install pbkdf2

pyaes: It is a pure-python implementation of AES block-cipher algorithm.
pbkdf2: It is a password-based key derivation algorithm.
binascii: It is used for the conversion between binary and ASCII.
secrets: It is used for generating cryptographically strong random numbers.

AES encryption is very fast and secure. It is a symmetric encryption algorithm. It derives 256-bit key using pbkdf2 key derivation algorithm from the password. We have used random password derivation salt (128-bit). This salt gets stored in the output having ciphertext. AES encryption CTR block mode generates 256-bit initial vector(IV) and perform AES-256-CTR encryption. We have decrypted the data using an AES-256-CTR algorithm in which the input consists of the ciphertext, encryption key and IV for CTR counter.

XOR encryption converts the plaintext in the ASCII format. XOR algorithm has fast computation. It is a symmetric encryption and is very easy to understand and analyze. XOR algorithm is hard to crack by brute-force method, i.e. generating random encryption keys to match with the correct one. In symmetric encryption algorithm, the same key is used to both encrypt and decrypt a data.

Thanks for watching!

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