EU mandated messaging platform love-in is easier said than done: Cambridge boffins
According to Blessing and Anderson, making encrypted end-to-end communication services interoperable will require novel protocols and processes, both technical and social, in order to be simultaneously secure and usable.
"The resulting complexity of the system may inherently compromise the level of security due to the increased number of moving parts, just as key escrow mechanisms endanger cryptography even if the escrow keys are kept perfectly secure." Then there are the non-technical issues – how services cooperate with one another to tackle spam and abuse, how they deal with vulnerabilities and outages. Interoperability, the researchers argue, represents a dramatic expansion of the trust surface for messaging users, who now have to consider the practices and policies of gatekeeper partners.
Given concerns that innovation is easier with a centralized, unfederated protocol than a federated, distributed scheme, Blessing and Anderson see platform API bridges as the more likely scenario, at least in the short term. Under this scenario, platforms would maintain their own E2EE protocols and offer a client-side interface for other messaging services to connect over a bridge.
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