The emoji was reportedly approved by a Telegram employee by mistake.
One group active this week was titled "Kids boy gay" and contained more than 250 members, according to the Financial Times.
WhatsApp co-founders Brian Acton and Jan Koum have both left Facebook, which acquired the company in 2014 for $22 billion.
Government officials want greater access to secure communications data.
Telecom companies will now have to store all user communications for six months.
The PGP vulnerabilities could be exploited to expose encrypted messages in plain text, academics warn.
"I'm setting up a small group to explore how to best leverage blockchain across Facebook," said executive David Marcus.
Whistleblower Edward Snowden has urged Twitter to bulk up the security of direct messages.
Speculation has mounted that Koum clashed with Facebook over how it used personal data collected from WhatsApp.
Russia's Federal Security Service claimed the chat application is used by terrorists.
A joint investigation by the FBI and law enforcement officials in Australia and Canada determined that the phones were made explicitly for evading law enforcement.
Moxie Marlinspike and Brian Acton announce the creation of the Signal Foundation, a new non-profit, to develop secure communications.
In addition to dozens of bathing, naked women, the illustrations feature stars, planets, plants and diagrams resembling Zodiac signs.
A security flaw could potentially allow hackers or government spies to slide into group chats unnoticed.
The smartphone application allows for messages to be deleted almost instantly.
Texas Rangers served Apple with a search warrant for an iPhone discovered at the scene of the mass shooting.
Many within capital markets communicate using WhatsApp, WeChat, and Telegram—and these will have to become compliant.
Facebook, Google, Microsoft and Twitter met with ministers following the London terror attack last week.
With governments unlikely to ever get backdoor access to tech devices, authorities may turn to selective hacking, as in the Apple/San Bernardino case.
The popular messaging apps have closed the hole that left users' accounts open to being taken over by hackers.
Encryption used by WhatsApp, Telegram and Signal is useless if devices are infected by spy tools.
Important milestone reached that protects more web users from eavesdropping and hackers.