By law, NSLs can request only non-content information, for example, transactional records and phone numbers dialed, but never the content of telephone calls or

By law, NSLs can request only non-content information, for example, transactional records and phone numbers dialed, but never the content of telephone calls or e-mails. https://fas.org/sgp/crs/intel/RL33332.pdf https://fas.org/sgp/crs/intel/RL33332.pdf NSLs don't break well-designed and well-implemented E2E encryption. They can obtain metadata, which can still be harmful, but that's it. If you want metadata on Telegram users, just hack Telegram's ISP. If the NSA hasn't already done so, I'd be surprised.