Re: You Can Phone Me Or SMS me; Period
An hash of a phone number? It looks to me it is quite easy to de-hash - usually phone numbers have a fixed format - knowing the user location let you know how many digit the number is a made of, and generating a rainbow table say with ten digits doesn't look a big effort.
And if they tell you which "friends" you have, they evidently store more than a hash.
Biting the hand that feeds IT
