RSA Light for IoT

A Python package to implement RSA Lightweight adapted for Public key Cryptography in IoT devices.

Installation

Run the following

pip install RSA-light-iot

Usage

It is used in establishing secure communication channel using RSA by Key-exchange

Consider a key k to be exchanged over unsecured channel

Generate Prime numbers of minimum length of 32bits

Example Code

from RSA_light_iot import RSA_Light

key = "6UJ5lOU9ls1ialQ0xIyVkzO-Vg_uBKUDkzaL2Ip83fA="
print("Let the key to be exchanged is ", key)

SIZE = 32

rsa = RSA_Light(SIZE)
k_pub, k_prv = rsa.rsalight_keygen()
print("\nGenerating Public and Private keys.............")
print("\nThe Public keys are ", k_pub)
print("The Private keys are ", k_prv)

cip = []
cip_str = []
for k in key:
    asc = ord(k)
    cipher = rsa.rsalight_encrypt(asc, k_pub)
    cip.append(cipher)
    cip_str.append(str(cipher))

cipher = ''.join(cip_str)
print("\nThe Encrypted key using Public key\n", cipher)

message = []
for c in cip:
    msg = rsa.rsalight_decrypt(c, k_prv)
    message.append(chr(msg))

message = ''.join(message)
print("\nThe Decrypted key using Private key\n", message)

Pro Features

• RSA algorithm utilizing three primes as against the standard RSA algorithm of two normal primes are utilized to improve the security.
• Enhances the security of RSA algorithm by keeping it away from few attacks that are available on RSA algorithm like chosen cipher-text attack, common modulus attack, known plaintext attack, and timing.
• Speed enhancement on the decryption side of RSA algorithm was introduced by utilizing the idea of Chinese remainder theorem.
• Prevention from mathematical factorization attacks by making the process very hard to factorize it and get the original numbers.
• Despite of a slight increase of time complexity, this modification makes the algorithm more secure.

Reference

Zaid, Mustafa & Hassan, Soukaena. (2018). Lightweight Rsa Algorithm Using Three Prime Numbers. International Journal of Engineering and Technology(UAE). 7. 293-295. 10.14419/ijet.v7i4.36.23790