01-25に読んで、聞いた記事
記事の内容：Telegram, Signalなど、ユーザー情報を比較的取らないメッセージサービスが増えている。
所感：Telegram、Signal等の株価を調べてみようと思う。未上場かもしれない。簡単に真似されそうなものだが、何で収益を上げるつもりだろうか。
知らない単語があった文（Google dictionary）
What and who gain attention, and what can be done to withhold it from particular people and ideas, are contested issues.
Refuse to give (something that is due to or is desired by another).
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But because they are removed from the public sphere they provoke far less outrage and controversy, and far fewer arguments over regulation.
A round solid figure, or its surface, with every point on its surface equidistant from its center.
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Before Joe Biden’s inauguration there was concern that these channels would be used to plan violent attacks.
The beginning or introduction of a system, policy, or period.
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But the messaging services are also having a much broader and on balance salutary effect on online life.
(especially with reference to something unwelcome or unpleasant) producing good effects; beneficial.
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Dr Urman says that in the past two years she has seen radical speech disappearing from the public internet.
(especially of change or action) relating to or affecting the fundamental nature of something; far-reaching or thorough.
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He also says he is certain law-enforcement agents are already working to infiltrate such groups, though as yet he is unaware of any big busts that have involved activity on Signal or Telegram.
Enter or gain access to (an organization, place, etc.) surreptitiously and gradually, especially in order to acquire secret information.
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