Overview

• Signal Messenger LLC published a detailed, 5,900-word technical write-up eleven days ago outlining updates that make the Signal Protocol fully quantum-resistant.
• The Signal Protocol, an open-source engine used by multiple private chat apps including Signal Messenger, is characterized as delivering robust end-to-end encryption.
• The overhaul addresses the risk that future quantum computers could break widely used public-key algorithms protecting web visits, cryptocurrency wallets, and other long-lived secrets.
• Adoption of quantum-resistant TLS remains limited, with less than half of TLS connections on Cloudflare’s network and only 18 percent of Fortune 500 networks supporting it.
• High migration costs and uncertain timelines leave organizations weighing post-quantum upgrades against immediate threats such as ransomware and espionage.