The best Internet Security newsletters

Long-form essays arguing that the web conflates access with authority, leaving credentials, payments and intermediaries structurally insecure and costly, especially now that AI has collapsed the cost of attacks. Issues pair full essays with executive summaries and short versions, drawing on technical detail, history and economic argument.

A practitioner's guide to Shodan, the search engine for internet-connected devices, covering its search syntax, features, and how penetration testers use it for asset discovery. It also explains membership limits and the legal and ethical limits on using what Shodan finds.