Unified Attestation will permit using products from the companies involved in it while forbidding using arbitrary alternatives. They clearly aren't going to enforce reasonable security standards since their products wouldn't meet those. The whole purpose of the system is to permit their products regardless of merit and convince banking/government apps to adopt it.

There's nothing neutral or fair about a system controlled by companies approving their own products while disallowing other options.

Companies forming an anti-competitive cartel providing a service which permitting their products and while disallowing others isn't legal regardless of how they market it. It's not legal when Google does it with the Play Integrity API and it's not legal when it's Volla, Murena and iodé doing it.

We won't be participating in a system which gives these companies veto power over app compatibility on GrapheneOS. These companies will not be given the power to make arbitrary demands of GrapheneOS.

We've been talking back and forth with multiple regulators over the past several years about the Play Integrity API to have action taken against it. Unified Attestation is a massive disruption to our efforts and will get in the way of having regulators take action against this. We've also been considering filing a lawsuit against Google over the Play Integrity API.

Unlike Google, the companies involved in Unified Attestation don't have massive resources to defend their anti-competitive system.