# SeedShield<\/p>\n
**Cryptographic structure seed protection for Paper\/Spigot servers.**<\/p>\n
SeedShield prevents seed cracking tools (chunkbase, SeedCrackerX, Structurecracker) from determining structure locations by replacing each structure type’s placement salt with an irreversible SHA-256 derived value.<\/p>\n
**This is the first Paper\/Spigot plugin to provide cryptographic structure seed protection.** Previously, this level of protection was only available through Fabric mods or custom server forks.<\/p>\n
## How It Works<\/p>\n
Minecraft determines structure positions using this formula:<\/p>\n
“`
\nposition = f(worldSeed, regionCoords, salt)
\n“`<\/p>\n
The `salt` is a hardcoded integer per structure type. Tools like chunkbase know these default salts, so knowing the world seed = knowing all structure locations.<\/p>\n
SeedShield replaces each salt with:<\/p>\n
“`
\nsalt = SHA-256(secretKey + “:” + worldSeed + “:” + structureType)[0..4]
\n“`<\/p>\n
– **Per-structure isolation**: Each structure type gets a unique cryptographic salt. Cracking one type’s salt reveals nothing about others.
\n– **Secret key protection**: Without the 256-bit key (stored in `config.yml`), salts cannot be reversed.
\n– **Stronghold protection**: Also modifies `concentricRingsSeed` and recalculates ring positions.<\/p>\n
## Installation<\/p>\n
1. Download `SeedShield-1.0.0.jar`
\n2. Place it in your server’s `plugins\/` folder
\n3. **Delete the region files** of worlds you want to protect (structures must regenerate)
\n4. Restart the server
\n5. Edit `plugins\/SeedShield\/config.yml` to configure which worlds to protect<\/p>\n
> **Important**: SeedShield only affects newly generated chunks. Existing structures in already-generated chunks will not change positions.<\/p>\n
## Configuration<\/p>\n
“`yaml
\n# Auto-generated 256-bit secret key. DO NOT SHARE.
\nsecret-key: “a1b2c3d4…”<\/p>\n
# Worlds to protect
\nenabled-worlds:
\n – world
\n – survival
\n“`<\/p>\n","protected":false},"excerpt":{"rendered":"
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