# multiprocessing.AuthenticationError

- **ID:** `python/multiprocessing-authenticationerror`
- **Domain:** python
- **Category:** auth_error
- **Verification:** official
- **Fix Rate:** 80%

## Root Cause

Multiprocessing authentication key mismatch between processes.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.x | active | — | — |