What are the limitations of end-to-end encryption in current chat messaging?
End-to-end encryption in chat messaging services, such as WhatsApp and Signal, provides security against present-day threats by ensuring that messages can only be read by the intended recipient. However, these services are not quantum-secure and are vulnerable to future quantum computing attacks. Quantum computers, once they become sufficiently advanced, will be able to break the encryption algorithms used by these services, exposing all harvested chat history and messages. Given that data is already being harvested and stored by adversaries, adopting quantum-secure encryption now is imperative to safeguard data against future quantum threats and to protect businesses and individuals from data breaches, intellectual property theft, and other cybercrimes.