Additionally, WhatsApp will take the unusual step for a consumer app of notifying users if messages are encrypted, Marlinspike said.
"Currently, WhatsApp can change terms and conditions at any time, without notifying users, which many people who use this service aren't aware of.
Instead, the company said it wanted the ability to offer such ads in the future and was notifying users in advance.
Yahoo is notifying users who may have been affected and says that anyone who has not changed their Yahoo passwords since 2014 should do so.
Under its old privacy policy, Moves was committed to notifying users of any change to the policy "through the service, by email, via our Twitter account or otherwise".
The social network began notifying users that it would soon delete all their synced photos if they did not install the app, which was released in June 2015.
He said the company was periodically forced to hand over data and sometimes prevented by legal restrictions from even notifying users that it had done so.
Google has stopped notifying users in China that they may be searching for censored keywords.
In some cases, Petry added, a "closed" subpoena can mean Google is legally prohibited from even notifying users that their data is being shared with the government.
Myspace is notifying users and has already invalidated the passwords of known affected accounts.
But one, TwitApps, will hit it tomorrow, the developer is notifying users.
