The letter, sent to the IPT on Friday and shared with the Guardian ahead of delivery, was signed by Oregon Senator Ron Wyden and Ohio Representative Warren Davidson. They argue that the tribunal's handling of the case has kept critical details about the scope of the UK government's demand hidden from the public, creating unnecessary friction between Washington and London.
The IPT is a British court that oversees the use of investigatory powers, including covert surveillance and data access requests. Apple is challenging a government demand that it disable or bypass encryption protections on its devices, which the company says would undermine the security of all users. The case has been conducted largely in secret, with only heavily redacted rulings made public.
The lawmakers' intervention highlights growing bipartisan concern in the US Congress about the UK's push to weaken encryption, a step they view as a threat to digital privacy and national security. The letter does not call for a specific outcome in the case but urges the tribunal to conduct its proceedings with greater transparency, particularly given the potential implications for US citizens and companies.