# Aion 2: reconstruction of the client-to-server network protocol

> Aion 2 Network Protocol Research reconstructs parts of the game's client-to-server network protocol from captures and client inspection. It documents unsigned-varint framing, LZ4 bundles, an RSA-OAEP-SHA1 world handshake and continuous RC4 over post-handshake client frame bodies. Python tools analyze captures, recover session material and implement client cryptographic primitives.

- Type: Case study
- Targets: Game · Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/lunixxx37/aion2-protocol-research>
- Primary source: <https://github.com/lunixxx37/aion2-protocol-research/blob/fe2122f0e54e1de854c11e91e3c7bf51916a4f52/README.md>
- Catalog page: <https://awesomerea.org/resources/aion2-protocol-research-case/>
- Record JSON: <https://awesomerea.org/resources/aion2-protocol-research-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/aion2-protocol-research-case/index.md)

## Requirements & limits

- **Prerequisites:** Python 3.10 or later is required; live opcode viewing and process-memory tools target the Windows client.
- **Limits:** The documented snapshot is the Global client revision 3527; most client-to-server payload meanings remain unmapped.
- **Testing evidence:** The author reports validation of the RC4 model across six independently keyed sessions.
- **License:** MIT license.

## Primary sources

1. <https://github.com/lunixxx37/aion2-protocol-research/blob/fe2122f0e54e1de854c11e91e3c7bf51916a4f52/README.md>
2. <https://github.com/lunixxx37/aion2-protocol-research/blob/fe2122f0e54e1de854c11e91e3c7bf51916a4f52/docs/PROTOCOL.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.