Ranked in these QuestionsQuestion Ranking
Pro Uses phone numbers, something that is with the user every day
Digits uses phone numbers for authenticating instead of passwords. Users simply insert their phone number, and a confirmation sms will send them the secret code which will be used for signing in.
Con By stealing the phone, anyone can have access to services using Digits
If the phone with the number inside is stolen, then anyone can use it to access the services protected by Digits.
Con Phone numbers are reused
Phone numbers are reused by telecom companies so one person could inherit all access to services from another person.