I'm a 16-year-old developer from China, currently studying at Xi'an Jiaotong University (Special Class for the Gifted Young). I write code because I believe privacy is a human right.

• KaleidoTalk — An end-to-end encrypted chat software with X25519 key rotation, irreversible account freeze, cover traffic, and modern UI.
  🔗 github.com/hbzsoft/KaleidoTalk · kaleidotalk.hanbangze.tech

v3.0 released on my 16th birthday 🎉

• International Collegiate Programming Contest (ICPC) — competitive programming, algorithms, data structures.
• Cryptography & system security — applying theory to real-world privacy tools.

• Programming languages: Python, C++
• Systems & networks: secure protocol design, distributed systems, performance optimization
• Privacy & digital rights: building tools that empower individuals

• Email: bangze.han@stu.xjtu.edu.cn
• Luogu: XSS_Worm (uid 704330)
• GitHub: hbzsoft

#include <bits/stdc++.h>
using namespace std;

int main() {
    cout << "Hello World!" << endl;
    cout << "Privacy is a human right." << endl;
    return 0;
}

⭐ Feel free to reach out — I'm always open to collaboration, ideas, and conversations about privacy and technology.