Social media is an essential tool of communication and political expression but also of criminal activities, including phishing and hacking. When a person connects to a service, they are normally confronted with an “authorization request” which allows them to choose whether they wish to open an account on this service or not. However, exceptions exist for some services such as Twitter that do not offer this authentication system. Dual authentication consists of a combination of two elements: a personal key (such as a password) and a code sent to the candidate's mobile phone data. This double authenticating.

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