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https://github.com/nitsc/chrayptor

A command-line communication software focused on human rights, utilizing advanced algorithms to protect your privacy and security. It’s the international version of Chraypt, with integrated Tor support.
https://github.com/nitsc/chrayptor

aes argon2 blake3 curve25519 decrypt digital-signature ecc ecdh eddsa encrypt hash p2p p2p-chat python3 sha3-512 sha512 sm4 socks5 tor tor-network

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A command-line communication software focused on human rights, utilizing advanced algorithms to protect your privacy and security. It’s the international version of Chraypt, with integrated Tor support.

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README 

        
# Overview

![ChraypTor](https://github.com/user-attachments/assets/4a0bd819-895b-455a-8827-003d51373ecb)

A command-line communication software focused on human rights, utilizing advanced algorithms to protect your privacy and security. It’s the international version of Chraypt, with integrated Tor support. See https://github.com/nitsc/chraypt for China special edition, Chraypt.



# Development Objectives

## Overview

We firmly believe that everyone has their own human rights.

## Program Dev

- Developers must adhere to the principles of human rights

- Prohibit the collection of all information about Chrayptor users.

- Adhere to Chrayptor's P2P, E2E, decentralized, and Tor features.

- Adhere to the security and privacy of Chrayptor.

- Adhere to the principles of high open source and free modification of source code.



# Objective Standard

## Languages

- **Rust**: After Python prototyping, rewrite Chrayptor in Rust.

- **Python**: may retain some Python parts.

- **Go**: possibly use Chrayptor for key parts of network concurrency.

## Algorithms

### Symmetric encryption: used to encrypt large amounts of data, fast speeds

- **AES** (Advanced Encryption Standard): widely used in communication protocols (e.g., TLS) **(implemented)**

- **ChaCha20**: a stream cipher, often used in conjunction with Poly1305 message authentication codes to provide efficient and secure encryption and authentication

- **SM4**: a commercial cryptographic algorithm released by the State Cryptography Administration of China (SCCA) and widely used in the financial and government sectors in China **(Implemented)**



### Asymmetric encryption

- **ECC** (Elliptic Curve Cryptography): more efficient than RSA, suitable for mobile devices **(Implemented)**

- **SM2**: an elliptic curve public key cryptography algorithm standard published by the State Cryptography Administration of China (SCCA) **(canceled, because it is not widely used and documented at present)**

- **NTRU** (Nth Degree Truncated Polynomial Ring Units): a Lattice-based public key cryptography algorithm.

- **Lattice-based Cryptography**: Lattice-based Cryptography

- **Code-based Cryptography**: is a post-quantum cryptography approach that uses the difficulties of error-correcting code theory to construct cryptosystems



### Key exchange algorithms

- **Diffie-Hellman** (DH): used to securely generate shared keys **(canceled because of the high efficiency of the key ECDH and the low quantum security)**

- **ECDH** (Elliptic Curve Diffie-Hellman): based on elliptic curves, more efficient **(implemented)**

- **Kyber**: is a lattice-based key exchange protocol that is a candidate for the NIST Post-Quantum Cryptography Standardization Project

- **Curve25519**: is an elliptic curve for efficient and secure cryptographic protocols, especially in the implementation of public-key cryptography and key exchange protocols **(Implemented)**

- **CSIDH** (Commutative Supersingular Isogeny Diffie-Hellman) is a post-quantum key exchange protocol based on the homology of supersingular elliptic curves **(canceled, since there is currently no mature CSIDH library)**



### Digital signature algorithms

- **ECDSA** (Elliptic Curve Digital Signature Algorithm): is a widely used digital signature algorithm based on elliptic curve cryptography (ECC)

- **SM2**: based on the elliptic curve discrete logarithm puzzle

- **EdDSA** (Edwards-curve Digital Signature Algorithm): digital signature algorithm based on Edwards curves **(implemented)**



### Hash Algorithm

- **SHA3-512**, **SHA2-512**,: high security, widely used for data integrity verification, signature verification **(Implemented)**

- **Argon2**: specifically designed to resist brute-force attacks on hardware acceleration such as GPUs and ASICs **(Implemented)**

- **BLAKE3**: very modern and high performance **(Implemented)**

- **SM3**: standard for cryptographic hashing algorithms published by the Chinese State Cryptography Bureau **(canceled, as it is not widely used and documented at the moment)**



### Random number generation algorithm

- **CSPRNG** (Cryptographically Secure Pseudo-Random Number Generator) **(realized)**



### Communication protocols

- **TLS**: (Transport Layer Security): implements encrypted transport, authentication **(implemented, but client-side authentication is temporarily disabled because SSL does not trust self-signed certificates)**

- **Noise Protocol Framework** (Transport Layer Security)： for modern communication software

- **Tor**: access to the Tor network **(Implemented)**

- **I2P**: Access to I2P networks.



### Zero Knowledge Proofs

- zk-SNARKs, zk-STARKs



# Using Instructions

## Install and set Tor

### Ubuntu based Linux

```bash

sudo apt update

sudo apt install tor

```

### Windows

- Download and Install [Tor Expert Bundle](https://www.torproject.org/download/tor/).

- Findout the tor.exe, donnot run it.



## Set up the Tor HiddenService

### Find torrc out

- Linux: /etc/tor/torrc

- Windows: C:\Users\\AppData\Roaming\tor\torrc

If ther isn't any torrc here, try to build file 'torrc'

### Edit torrc

Write this to torrc:

```torrc

HiddenServiceDir "path\\to\\your\\tor-expert-bundle-windows-x86_64-14.0.4\\tor\\hidden_service\\"

HiddenServicePort 80 127.0.0.1:52000

ControlPort 9051

CookieAuthentication 1

SocksPort 9050

```



## Restart Tor

### Linux

```bash

sudo systemctl restart tor

```

### Windows

Stop and Restart tor.exe



## Find Host Address

### Linux

/path/to/hidden/service/directory/hostname

### Windows

path/to/hidden/service/directory/hostname



## Test

Run torserver.py and cilent.py, enter the hostname(.onion).

Then you can connect to server.

Talk in safety and privacy!