← All Kali Issues
Kali Linux
apt GPG error
P Package
Critical
🔴 Error Message
EXPKEYSIG - signatures were invalid
📖 What This Means
GPG keys expired or missing.
🔧 Step-by-Step Fix
- Update keyring: sudo apt install kali-archive-keyring
- Import key: wget -q -O - https://archive.kali.org/archive-key.asc | sudo apt-key add -