ProtonMail and Anonymity

Jeff Allen jrallen at
Mon May 6 14:53:14 CEST 2019

On 5/5/19 4:20 PM, Michał Górny wrote:
> Don't you think that brute-forcing a hash of a phone number would be
> trivial?

It would be more trivial not to hash the number and say you did.
ProtonMail claims they hash the number and store it unlinked to your
account.  Their stated objective is to prevent the same phone number or
email address from being used to sign up for numerous accounts.  As I
said, I believe them.  You apparently do not.

People who don't trust ProtonMail shouldn't use it.  Why believe them
about end-to-end encryption if you can't trust them?  That would seem to
me to be a bigger concern than how they handle your number or email address.


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