SecureSeed-Reborn
SecureSeed-Reborn changes how the world seed drives random generation, so that seed cracking tools have far less to work with on Fabric worlds.
What it does
The mod replaces the vanilla 64-bit world seed with a 1024-bit seed, protected by cryptographic techniques that are meant to keep seed cracking tools from recovering the original value. It is a partial port of an earlier SecureSeed mod. Only parts of the random generation logic were changed; terrain and biomes keep their original layout.
The seed still connects the generation of different features, so the placement of every feature that depends on randomness is tied to it. Such features appear in different places than they would with the original seed. Links between features are preserved, so a diamond and a clay patch can still relate to each other in the same world. Players who abuse seed knowledge to locate features will find that route closed.
The mod is built for Fabric on Minecraft 1.21 – 1.21.4, with files for 1.21, 1.21.1, 1.21.2, 1.21.3 and 1.21.4. The latest file is 1.0.1 for 1.21.4, published on 2024-12-05. It runs on the client or the server, and it is open source under the GNU General Public License v3.0 only.
Key features
Cryptographic world seed
The vanilla 64-bit seed is replaced with a 1024-bit seed intended to resist seed cracking tools.
Altered random generation
Only the parts of generation that depend on randomness are changed, while terrain and biomes remain as before.
Linked feature placement
Features still depend on the seed together, so their relationships are kept.
Relocated features
Ores, villages, strongholds, geodes and other features are placed differently from a world using the original seed.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Seed Guard is a server-side only mod for Fabric and Quilt, published under the MIT License for 1.20 – 26.3. Fake random seed is a Fabric mod for 1.21.4 – 1.21.10 that runs on the client and server and is open source under the GNU General Public License v3.0 only. Panda Per-World-Seed is server-side only and released under CC0 1.0 Universal for 1.21.1 – 26.3. SecureSeed-Reborn covers 1.21 – 1.21.4 and is open source under the GNU General Public License v3.0 only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| SecureSeed-Reborn | Fabric | 1.21 – 1.21.4 | Client or server, optional | 2024-12-05 |
| Seed Guard | Fabric and Quilt | 1.20 – 26.3 | Server-side only | 2026-09-20 |
| Fake random seed | Fabric | 1.21.4 – 1.21.10 | Client and server | 2025-10-12 |
| Panda Per-World-Seed | Fabric | 1.21.1 – 26.3 | Server-side only | 2026-10-04 |
Questions
Does SecureSeed-Reborn need Fabric API?
Does the server need the mod, or can players join without it?
Which game versions are supported?
In the catalog
SecureSeed-Reborn is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 17,979 mods support Minecraft 1.21.4.
More from Undefined_0721
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What the author says
State-of-the-art cryptography to protect your world seed against seed cracking tools. This mod is a partial port of the SecureSeed mod for Minecraft 1.16, it changes vanilla 64-bit seed to a 1024-bit seed, making it impossible to crack the seed. Not only that, there are a lot of things changed related to how random…
Official listing
- Modrinth page
- modrinth.com/mod/secureseed-reborn
- Owner
- Undefined_0721
- Published
- 2024-12-02
- Updated on Modrinth
- 2024-12-05
- Facts verified
- 2026-10-15