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Whisper Systems was an American enterprise mobile security company that was co-founded by security researcher
Moxie Marlinspike Moxie Marlinspike is an American entrepreneur, cryptographer, and computer security researcher. Marlinspike is the creator of Signal, co-founder of the Signal Technology Foundation, and served as the first CEO of Signal Messenger LLC. He is als ...
and roboticist Stuart Anderson in 2010. The company was acquired by
Twitter Twitter is an online social media and social networking service owned and operated by American company Twitter, Inc., on which users post and interact with 280-character-long messages known as "tweets". Registered users can post, like, and ...
in November 2011. Some of the company's software products were released under
open-source license An open-source license is a type of license for computer software and other products that allows the source code, blueprint or design to be used, modified and/or shared under defined terms and conditions. This allows end users and commercial compa ...
s after the acquisition. An independent group called
Open Whisper Systems Open Whisper Systems (abbreviated OWS) was a software development group that was founded by Moxie Marlinspike in 2013. The group picked up the open source development of TextSecure and RedPhone, and was later responsible for starting the devel ...
later picked up the development of this open-source software, which led to the creation of the
Signal Technology Foundation The Signal Foundation, officially the Signal Technology Foundation, is an American non-profit organization founded in 2018 by Moxie Marlinspike and Brian Acton. Its mission is "to develop open-source privacy technology that protects free expres ...
.


History

Security researcher
Moxie Marlinspike Moxie Marlinspike is an American entrepreneur, cryptographer, and computer security researcher. Marlinspike is the creator of Signal, co-founder of the Signal Technology Foundation, and served as the first CEO of Signal Messenger LLC. He is als ...
and roboticist Stuart Anderson co-founded Whisper Systems in 2010. The company produced
proprietary {{Short pages monitor