# elgamal-anass-daniel
A friendly module for testing ElGamal Cryptosystem.
Moreover, it also brings futures such as validating primitive roots, obtaining them, and optimized operations such as Fast Modular Exponentiation.
Developed by Anass Anhari & Daniel Alamillo (c) 2023
## Examples of How To Use
ElGamal built-in and optimized operations:
```python
from ElGamal import ElGamal
elGamal = ElGamal()
# Fast Modular Exponentiation
elGamal.FastModExp(g=2, e=284523875345345, p=456), 32) # 32
elGamal.FastModExp(g=100, e=284523875345345, p=456) # 256
# Obtain Primitive Roots
elGamal.getPrimitiveRoots(5) # [2, 3]
elGamal.getPrimitiveRoots(29) # [2, 3, 8, 10, 11, 14, 15, 18, 19, 21, 26, 27]
# Obtain the First Primitive Root
elGamal.getFirstPrimitiveRoot(6) # None
elGamal.getPrimitiveRoots(29) # 2
# Test a Primitive Root
elGamal.isPrimitive(725, 829) # True
elGamal.isPrimitive(41, 101) # False
msg1 = ElGamal.Message("[Msg-1] Hola que tal estas! :D")
msg1.encrypt(g=2, g_x=1024, p=8820220609)
print(msg1.decrypt(x=10, p=8820220609))
```
Create a message, encrypt it and decrypt it:
```python
from ElGamal import Message
msg1 = Message("[Msg-1] Hola que tal estas! :D")
msg1.encrypt(g=2, g_x=1024, p=8820220609)
print(msg1.decrypt(x=10, p=8820220609))
```
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