A salted hash of a phone number is both useless and pointless.
You can easily brute force the narrow key space if you’re trying to verify if it’s “known”. And if you want to send an actual message you need the full value.
Sounds more like you want to outsource user verification and receive an opaque token for future validation.
You can easily brute force the narrow key space if you’re trying to verify if it’s “known”. And if you want to send an actual message you need the full value.
Sounds more like you want to outsource user verification and receive an opaque token for future validation.