AntiSeedCracker

# AntiSeedCracker [](https://github.com/SunsetRQ7/AntiSeedCracker/actions/workflows/build.yml) [](https://github.com/SunsetRQ7/AntiSeedCracker/releases/latest) [](https://github.com/SunsetRQ7/AntiSeedCracker/blob/main/LICENSE) [](https://adoptium.net/) ### Stop seed crackers. Silently. Permanently. Your world seed is the master key to your entire map. Whoever recovers it can compute — instantly, from outside the game, with zero in-game effort — the exact location of every stronghold, ancient city, buried treasure, ore vein, and slime chunk on your server. **That's not a minor leak. That's wallhack-grade ESP for your whole world.** AntiSeedCracker shuts every known door a cheat client, ghost client, or tool like SeedCrackerX can use to get it. **14 protection layers. Zero kicks. Zero bans.** Cheaters just quietly receive cryptographically random garbage and never find out why their cracker keeps failing. --- ## Why protect your seed? Once your seed is out, it doesn't matter how good your build-battle event or your economy plugin is — every hidden structure on the map is public information to anyone with a laptop. Seed-cracking tools don't need to hack your server or read your files: they reconstruct the seed purely from structure coordinates a player legitimately walked to. AntiSeedCracker can't make that impossible (nothing can — see **Honest limits** below), but it closes off every *other* way to leak it, and gives you visibility into the one it can't. ## Protection layers **Network-level** - **Packet-level seed spoofing** — replaces the hashed seed in `JOIN_GAME` and `RESPAWN` packets with a per-player, cryptographically random fake before it ever leaves the server (Netty-level, via bundled PacketEvents). - **Dynamic seed rotation** — every player's fake seed rotates on a configurable interval, defeating crackers that accumulate data across sessions. - **Seed integrity monitor** — read-only watchdog confirming the real generation seed never drifts. AntiSeedCracker does not, and will not, write to your world's actual generation seed — see **Safe for your world** below. **World & structure** - **Eye of Ender redirection** — thrown Eyes are redirected to a per-player fake stronghold for their entire flight path, with angular jitter, making triangulation useless. - **`/locate` spoofing** — returns convincing fake coordinates, stable per player and per structure so repeat queries can't be used to spot the fake. - **End spike randomization** — shuffles the bedrock cap heights of the ten End pillars, destroying the vanilla height fingerprint that uniquely identifies a seed. - **End City fingerprint removal** — replaces the distinctive magenta glass pattern in End Cities (scoped to the structure's bounding box, not the whole chunk). - **Treasure & explorer map scrambling** — buried treasure, mansion, monument, and other structure icons on maps are randomized in the `MAP_DATA` packet, stable per map so icons don't visibly jitter around. - **Slime chunk obfuscation** *(opt-in)* — denies slime-chunk-sampling-based cracking at the cost of disabling slime farms where enabled. **Command & detection** *(all logging-only where noted — never punishes players)* - **Seed command blocking** — `/seed` and friends are blocked for players, console, and RCON, and stripped from tab-complete. - **`/execute`-wrapping protection** — every blocked command is also checked against what an `/execute ... run ...` chain ultimately dispatches to (recursively, for nested chains), closing a well-known Bukkit command-blocker gap. - **Structure reconnaissance monitor** — logs suspicious multi-structure visitation patterns matching known seed-cracking tool behavior; the tracked structure list is fully configurable. - **Command probing monitor** — logs a player racking up several blocked seed commands in a short window, a pattern consistent with a bypass-probing script rather than one curious `/seed`. - **Audit log** — every blocked attempt is recorded to a lightweight flat-file log, with `/asc stats` summaries in-game. ## Never punishes players AntiSeedCracker follows a strict no-punishment philosophy: no kicks, no bans, ever. Cheat tools silently fail while legitimate gameplay is completely unaffected — nobody gets caught in the crossfire. ## Safe for your world - The real seed is never read into logs, files, or network traffic, and is never rewritten by this plugin. - An earlier internal design continuously overwrote the live in-memory generation seed to spoof `World.getSeed()` for other plugins. That approach was removed in 3.3.0 after we found it could corrupt chunk decoration on affected servers — Minecraft re-reads that field fresh for every chunk it generates, not just once at world load. The plugin now only ever reads that value, never writes it. - Optional cosmetic changes (End spike caps, End City glass) are single-block, physics-free, run at most once per chunk, and can be disabled in the config. - Verified by live testing on real Paper 26.1.2 and Folia 26.1.2 servers: zero errors, real seed confirmed byte-for-byte intact on disk after extended runtime. ## Honest limits No plugin can make a seed truly uncrackable against tools like SeedCrackerX, which reconstruct it from the real coordinates of structures a player has legitimately explored — that's not a network exploit, and coordinates can't be hidden from a player standing at their own position. AntiSeedCracker closes every server-side leak we're aware of (packet spoofing, triangulation, command access, structure fingerprinting) and adds detection for cracking-pattern behavior, but exploration-based cracking is a limit of the genre, not something this plugin claims to solve. If a listing promises "100% uncrackable," be skeptical of it — not of us for saying so. ## Performance Fully asynchronous by design. Packet work runs on Netty I/O threads with lock-free map lookups; periodic tasks use the async scheduler; on Folia, block operations are dispatched to the owning region thread. Zero measurable TPS impact. ## Requirements & compatibility | | | |---|---| | Server software | Paper, Purpur, or Folia | | Minecraft version | 26.1 and newer (26.1.x – 26.2) | | Java | 25 or newer | | Dependencies | None — PacketEvents is bundled | Spigot/CraftBukkit and legacy Minecraft versions (1.16.5 – 25.x) are not supported by this release, as the plugin relies on modern Paper APIs for its async and region-threaded architecture. ## Quick start 1. Drop `AntiSeedCracker-3.5.0.2.jar` into your `plugins/` folder. 2. Restart the server. Protection is active immediately with sensible defaults. 3. Optionally tune `plugins/AntiSeedCracker/config.yml` — every layer, world list, message, and interval is configurable — and apply with `/asc reload`, or flip a single feature live with `/asc toggle`. ## Commands - `/asc status` — see every protection layer at a glance - `/asc stats` — audit log statistics - `/asc reload` — apply config changes live - `/asc toggle [true|false]` — flip one feature live without a full reload - `/asc info` — version, platform, and update status - `/asc help` — lists the subcommands you have permission to use Permissions: `antiseedcracker.admin` (umbrella, default: op), or split as `antiseedcracker.admin.status` (view-only) / `antiseedcracker.admin.manage` (reload/toggle) --- **Open source** under the MIT License: https://github.com/SunsetRQ7/AntiSeedCracker Issues and feature requests welcome on GitHub. Anonymous usage metrics via bStats (opt-out supported). *If you enjoy this project, thank you for your support! ❤️* # AntiSeedCracker Analytics Protecting Minecraft servers against seed cracking attacks.