The Brookings Institute finds that even while the social network deleted thousands of accounts associated with the terrorist group in 2014, new ones kept popping up.
A message allegedly posted on behalf of the terrorist group vows that "your virtual war on us will cause a real war on you."
Twitter is removing the militant group's accounts as they crop up, citing such accounts as violations of its terms of service.
Mobile-payment service wants to distance itself from extremist group the Islamic State of Iraq and Syria, also called ISIS.
Since the term "Isis" has become synonymous with a terror group, the digital-payment service is now working on rebranding.
The mobile payments joint venture is partner with Jamba Juice to give free smoothies to customers who pay with their smartphones.
The forum was used by cybercriminals to buy and sell malicious software, stolen data and more. It was, says an official, the "most sophisticated English-speaking forum for criminal computer hackers in the world."
The path to using your phone to pay for goods has been a long and windy one, but the head of Isis believes the time is right.
Technically Incorrect: A man is bored and invents a battle in a fictional Iraqi town called "Cheese Bladder." He tweets it. The rest isn't history.
Technically Incorrect: The boffins declare that the "Celebrity Apprentice" host is the worst presidential candidate since data was collected. Trump insists he's the greatest.