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This doesn't seem any more open than Verified by Twilio. Why would you trust Verizon/Comcast more than Twilio? As not a customer of both, STIR/SHAKEN doesn't

• kerkeslager 7y ago
  1. The promise being made is different. SHAKEN/STIR doesn't promise to only let through legitimate calls, it only promises to make caller ID accurate to prevent spoofing. This allows the weight of existing laws against robocalls to apply--the government, not Twilio, determines who is legitimate. Existing robocall laws are too lax IMO, but it's a step in the right direction. 2. This is being proposed as part of legislation. All telecoms in the US would be required to implement the technology. 3. I don't think it's accurate to call it "open", but it's not centralized in the same way that Twilio's solution is. It's a federated system analogous to HTTPS certificate authorities. Twilio's service is more analogous to content filtering services like NetNanny. As I mentioned, CAs have problems too, but they're a whole lot more open than NetNanny.