Signal (software)

Signal (software) is a cross-platform, encrypted messaging service developed by Signal Foundation and Signal Messenger LLC, founded by Moxie Marlinspike and Brian Acton. It allows users to send end-to-end encrypted messages, make voice and video calls, and share files with individuals or groups, similar to WhatsApp, Facebook Messenger, and Telegram. Signal's encryption protocol is based on the Signal Protocol, which was also used by WhatsApp and Facebook Messenger, and is considered to be one of the most secure messaging protocols, as acknowledged by Edward Snowden and Bruce Schneier. The service is available for Android, iOS, and Desktop platforms, including Windows, macOS, and Linux.

● Introduction

Signal is designed to be a private and secure messaging service, with a focus on end-to-end encryption and open-source development, similar to Tor and ProtonMail. The service is developed by Signal Foundation, a non-profit organization founded by Moxie Marlinspike and Brian Acton, with the goal of promoting Digital rights and Internet freedom, as supported by Electronic Frontier Foundation and Freedom of the Press Foundation. Signal's development is funded by donations from users and organizations, including Knight Foundation and Open Technology Fund, and is also supported by Google and Microsoft. The service has gained popularity among individuals and organizations concerned about Mass surveillance and Data privacy, including Julian Assange and Laura Poitras.

● Features

Signal offers a range of features, including end-to-end encrypted messaging, voice and video calls, and file sharing, similar to Skype and Zoom. The service also includes features such as group chats, file sharing, and disappearing messages, as seen in Snapchat and Instagram. Signal's encryption protocol is based on the Signal Protocol, which provides Forward secrecy and Deniable authentication, as recommended by National Institute of Standards and Technology and Internet Engineering Task Force. The service is available for Android, iOS, and Desktop platforms, including Windows, macOS, and Linux, and can be used with Google Chrome and Mozilla Firefox.

● History

Signal was launched in 2014 by Moxie Marlinspike and Brian Acton, with the goal of creating a private and secure messaging service, as inspired by Silicon Valley and Stanford University. The service was initially called TextSecure, but was later renamed to Signal, and has since become one of the most popular encrypted messaging services, alongside WhatsApp and Telegram. Signal's development is funded by donations from users and organizations, including Knight Foundation and Open Technology Fund, and is also supported by Google and Microsoft. The service has gained popularity among individuals and organizations concerned about Mass surveillance and Data privacy, including Julian Assange and Laura Poitras, and has been endorsed by Edward Snowden and Bruce Schneier.

● Security

Signal's encryption protocol is based on the Signal Protocol, which provides end-to-end encryption and Forward secrecy, as recommended by National Institute of Standards and Technology and Internet Engineering Task Force. The service uses Public-key cryptography and symmetric-key algorithms to encrypt messages and calls, similar to PGP and SSL/TLS. Signal's encryption protocol is considered to be one of the most secure messaging protocols, as acknowledged by Edward Snowden and Bruce Schneier, and has been reviewed and audited by Cryptography experts, including Matthew Green and Nadim Kobeissi. The service also includes features such as Two-factor authentication and Password hashing, as seen in Google Authenticator and LastPass.

● Reception

Signal has received positive reviews from Cryptography experts and Digital rights organizations, including Electronic Frontier Foundation and Freedom of the Press Foundation. The service has been endorsed by Edward Snowden and Bruce Schneier, and has been recommended by The New York Times and The Guardian. Signal has also been used by individuals and organizations concerned about Mass surveillance and Data privacy, including Julian Assange and Laura Poitras, and has been featured in The Wall Street Journal and Forbes. However, Signal has also faced criticism from some Law enforcement agencies, including the Federal Bureau of Investigation and the National Security Agency, which have expressed concerns about the service's encryption protocol, as reported by The Washington Post and CNN.

● Comparison_to_other_messengers

Signal is often compared to other encrypted messaging services, including WhatsApp, Telegram, and Threema. While these services offer similar features, Signal's encryption protocol is considered to be one of the most secure, as acknowledged by Edward Snowden and Bruce Schneier. Signal is also open-source, which allows for independent review and auditing of the service's code, similar to Tor and ProtonMail. In contrast, WhatsApp and Telegram are closed-source, which can make it more difficult to verify the security of their encryption protocols, as noted by Matthew Green and Nadim Kobeissi. Overall, Signal is considered to be one of the most secure and private messaging services available, as recommended by The New York Times and The Guardian. Category:Instant messaging