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Signal (software) Signal is an open-source, encrypted messaging service for instant messaging, voice calls, and video calls. [14][15] The instant messaging function includes sending text, voice notes, images, videos, and other files. [16] Communication may be one-to-one between users or may involve group messaging.
SIGNAL is a programming language based on synchronized data-flow (flows + synchronization): a process is a set of equations on elementary flows describing both data and control. [ 1 ] The SIGNAL formal model provides the capability to describe systems with several clocks [ 2 ] [ 3 ] (polychronous systems) as relational specifications .
The Signal Technology Foundation, commonly known as the Signal Foundation, [2] [3] is an American non-profit organization founded in 2018 by Moxie Marlinspike and Brian Acton. [4] Its mission is to "protect free expression and enable secure global communication through open source privacy technology ."
The Signal Protocol (formerly known as the TextSecure Protocol) is a non-federated cryptographic protocol that provides end-to-end encryption for voice and instant messaging conversations. [2] The protocol was developed by Open Whisper Systems in 2013 [ 2 ] and was introduced in the open-source TextSecure app, which later became Signal .
moxie.org. Matthew Rosenfeld, better known by the pseudonym Moxie Marlinspike, is an American entrepreneur, cryptographer, and computer security researcher. [1][3] 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 also a co-author of the Signal ...
Open Whisper Systems. Open Whisper Systems (abbreviated OWS[7]) was a software development group [8] 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 development of the Signal Protocol [9] and the Signal messaging app.
Digital signal processing. Digital signal processing (DSP) is the use of digital processing, such as by computers or more specialized digital signal processors, to perform a wide variety of signal processing operations. The digital signals processed in this manner are a sequence of numbers that represent samples of a continuous variable in a ...
They are a limited form of inter-process communication (IPC), typically used in Unix, Unix-like, and other POSIX -compliant operating systems. A signal is an asynchronous notification sent to a process or to a specific thread within the same process to notify it of an event. Common uses of signals are to interrupt, suspend, terminate or kill a ...