Amazon recently announced a change to its Amazon Web Services which will end the practice of domain fronting. In relation to this, the ecommerce giant also sent a warning letter to encrypted messaging app Signal, threatening to cut its CloudFront account if it continues to use Amazon’s sites to avoid censorship.
Domain fronting uses a content delivery network’s architecture to hide the actual destination of encrypted Internet traffic. Signal had previously used Google’s services, but switched to Amazon after the search giant got rid of the domain fronting scheme from its network.
Signal had reportedly used Google’s App Engine, and then Amazon’s Souq.com, for domain fronting to bypass censorship in countries such as Egypt, Oman, Qatar, and the United Arab Emirates.