lc6chang / ecc-pycrypto Goto Github PK
View Code? Open in Web Editor NEWA Python package for ECC and ElGamal elliptic curve encryption.
License: MIT License
ecc-pycrypto's People
Contributors
Stargazers
Watchers
Forkers
gnull enipu ilbaroni lusu2004 baiqyuniar pipminder00 irhys230 karim2019aj satyajeetkrjha sydneycaulfeild twill777 huajinghua alexanderkudecc-pycrypto's Issues
Please publish a package on pypi
I'm using your (awesome) library and I'd like to include it in a project. It would be so much easier if I could just pip install it.
Thank you!
'modular inverse does not exist' when doubling a point on the x axis
When doubling a point on x axis (i.e. y=0), the expected result is the Point at infinity but now it raises 'modular inverse does not exist' exception.
>>> from ecc.curve import Curve25519
>>> from ecc.curve import Point
>>> P = Point(x=0, y=0, curve=Curve25519)
>>> P + P
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/chang/ecc-pycrypto/ecc/curve.py", line 40, in __add__
return self.curve.add_point(self, other)
File "/Users/chang/ecc-pycrypto/ecc/curve.py", line 104, in add_point
return self._double_point(P)
File "/Users/chang/ecc-pycrypto/ecc/curve.py", line 255, in _double_point
s = up * modinv(down, self.p)
File "/Users/chang/ecc-pycrypto/ecc/math_utils/mod_inverse.py", line 16, in modinv
raise Exception("modular inverse does not exist")
Exception: modular inverse does not existAdditive Homomorphism for ElGamal
I have tried to check if this implementation can be used for Additive homomorphism available in ElGamal.
For example, to achieve sometime like this this
ADD(X,Y) = Enc(plain_text_1+plain_text_2)
where
X=(C1, C2)
Y=(C3, C4)
pri_key, pub_key = gen_keypair(Curve25519)
cipher_elg = ElGamal(Curve25519)
plain_text_1 = bytes([3])
plain_text_2 = bytes([4])
X=C1, C2 = cipher_elg.encrypt(plain_text_1, pub_key)
Y=C3, C4 = cipher_elg.encrypt(plain_text_2, pub_key)
C5 = Curve25519.add_point(C1,C3)
C6 = Curve25519.add_point(C2,C4)
result = cipher_elg.decrypt(pri_key, C5, C6)
Then the output is expected to be 7.
Seems cipher_elg.decrypt(pri_key, C5, C6) will not work.
Maybe it can be done as future improvements.
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.