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Phishing
Phishing is one of the most popular techniques used by cybercriminals to steal data. In its simplest form, criminals impersonate a legitimate entity (for example, a bank, e-commerce provider, or technology company) via email, SMS, or messaging 'apps' to trick the user and that you disclose your data or unintentionally download malware.
Many times it encourages the Internet user to 'click' on a link or open an attached file. Sometimes this leads the user to a fraudulent page that tries to impersonate the official of the entity that the criminal is posing as. There, a series of bank details are requested.
Malware
Over the years, different types of malicious code have been designed to steal information. Some even record keystrokes when entering card details on an e-commerce or banking site. How do criminals get these tools onto your device?
As in the previous case, phishing emails or text messages are a very popular method. Another is malicious online advertisements. Cybercriminals can also infect popular websites and wait for users to visit them. This type of 'malware' is installed as soon as the infected web page is visited. Information-stealing malicious code is also often hidden within legitimate-looking but malicious mobile apps.
This type of threat is increasingly directed against mobile devices.