Interesting summary of various ways to derive the public key from digitally signed files.
Normally, with a signature scheme, you have the public key and want to know whether a given signature is valid. But what if we instead have a message and a signature, assume the signature is valid, and want to know which public key signed it? A rather delightful property if you want to attack anonymity in some proposed “everybody just uses cryptographic signatures for everything” scheme.
More Stories
Friday Squid Blogging: Squid Game Season Two Teaser
The teaser for Squid Game Season Two dropped. Blog moderation policy. Read More
Clever Social Engineering Attack Using Captchas
This is really interesting. It’s a phishing attack targeting GitHub users, tricking them to solve a fake Captcha that actually...
US Cyberspace Solarium Commission Outlines Ten New Cyber Policy Priorities
In its fourth annual report, the US Cyberspace Solarium Commission highlighted the need to focus on securing critical infrastructure and...
Cybersecurity Skills Gap Leaves Cloud Environments Vulnerable
A new report by Check Point Software highlights a significant increase in cloud security incidents, largely due to a lack...
Going for Gold: HSBC Approves Quantum-Safe Technology for Tokenized Bullions
The bank giant and Quantinuum trialed the first application of quantum-secure technology for buying and selling tokenized physical gold Read...
This Windows PowerShell Phish Has Scary Potential
Many GitHub users this week received a novel phishing email warning of critical security holes in their code. Those who...