Читать книгу Cryptography, Information Theory, and Error-Correction - Aiden A. Bruen - Страница 32

Social media has seen exponential growth as well. For example, as of early 2019, Twitter had 126 million active daily users and Facebook had 1.2 billion daily users [Sha19]. In 2017, Facebook hit 2 billion monthly users. Yurieff notes in [Yur17] that, “It took the social network less than five years to go from 1 billion monthly users to 2 billion.”