---
title: What is the most secure strong authentication factor?
description: Learn which is the most secure strong authentication factor to access your easypay Backoffice.
---

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# What is the most secure strong authentication factor?

The **APP** is the most secure authentication factor, as there have been cases where hackers have successfully carried out **SIM swap** attacks, which can redirect the messages your mobile phone receives to the attacker’s device.

easypay recommends using a **2FA (Two-Factor Authentication) app**. This app also has the advantage of allowing access to the backoffice in environments without mobile network coverage.

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