# DDoSDefenderPE — Patch Notes — Release V1.40
*by Iudex Industries*
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## ⚠ Critical
**FastPass encryption upgraded to authenticated encryption.**
> Action required: delete your existing FastPass.txt before deploying — old entries are incompatible.
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## Bug Fixes
- **FastPass** — Encryption vulnerability patched; tampering is now detected on load.
- **Login tracking** — Race condition under concurrent load resolved.
- **Queue** — Stale entries no longer re-injected after expiry.
- **IPv6** — Connections now correctly grouped by subnet for rate limiting.
- **HandshakeListener** — Connections failing early checks no longer proceed to login.
- **HandshakeListener** — Internal maps are now bounded and cleaned up under attack conditions.
- **HPV port check** — Clients can no longer self-report an arbitrary port to bypass the check.
- **Protocol Update** — Updated The Protocol Check to Match the Current Protocol.
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## New Checks — 4 added (18 total)
- **Check15** — UUID version & variant fingerprinting.
- **Check16** — Username entropy analysis.
- **Check17** — Edit-distance clustering to catch near-identical name swarms.
- **Check18** — Degenerate name pattern detection.
Developer information
Projects on Modrinth are automatically available through a Maven repository for use with JVM build tools such as Gradle.
maven { name = "Modrinth"; url = "https://api.modrinth.com/maven" }