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Surespot
Surespot is an open source instant messaging application for Android and iOS. Surespot is one of the modern messaging apps that has a focus on privacy and security. For secure communication it uses end-to-end encryption by default.〔(【引用サイトリンク】 accessdate = 2014-11-24 )〕
==History==
On November 4, 2014, Surespot scored 5 out of 7 points on the Electronic Frontier Foundation secure messaging scorecard. It received points for having communications encrypted in transit, having communications encrypted with keys the providers don't have access to (end-to-end encryption), making it possible for users to independently verify their correspondent's identities, having their code open to independent review (open source), and for having their security designs well-documented. It lost points because past communications are not secure if the encryption keys are stolen (no forward secrecy) and because there has not been a recent independent security audit.〔(【引用サイトリンク】 publisher = Electronic Frontier Foundation )〕
In May 2015, Channel 4 News published an investigation in which they alleged that "at least 115 ISIS-linked people" appeared to have used Surespot between November 2014 and May 2015. In June 2015, a Surespot user wrote a blog post about how the Surespot developers had stopped responding to his repeated questions regarding "governmental demands for information", leading to the user alleging that the Surespot developers were "under a gag order". Surespot was specifically mentioned in a plea agreement in which a 17-year-old US citizen was charged with providing material support to ISIS.〔http://ia601502.us.archive.org/8/items/gov.uscourts.vaed.321610/gov.uscourts.vaed.321610.7.0.pdf〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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