Maximum Security: Protect Your Tax Data When Doing SAT Procedures on Your Cell Phone (Tips 2025)

Completing SAT transactions from your phone is convenient, but the security of your tax information is paramount. In 2025, cyberattacks are a real threat. This guide provides essential tips to protect your personal and tax information to the fullest.

The convenience of managing your tax obligations from your mobile phone comes with the responsibility of protecting your information. In a constantly evolving digital environment, where Mexico accounts for more than 55% of cyberattacks in Latin America , the security of your tax data is more critical than ever. Learn about the risks and key preventive measures to safely complete your SAT procedures in 2025.

Cybercriminals use a variety of tactics to steal personal and tax information, taking advantage of the increasing digitalization of business processes. The main risks include:

• Phishing and identity theft : Fraudulent emails and SMS messages that mimic the SAT (Tax Administration Service) to obtain your confidential data, such as passwords, RFC ( Registered Taxpayer Identification Number), and bank details, by redirecting you to fake websites.
• Malware : Malicious software that disguises itself as legitimate applications to steal information such as contacts, photos, text messages, or credentials. It is distributed through suspicious links or unverified websites.
• Unsecured public Wi-Fi networks : These networks can allow third parties to intercept your information while you browse. Conducting tax transactions on these networks poses a high risk of exposure.

The e.signature (formerly known as Advanced Electronic Signature) and your password are your digital identification with the SAT and have the same legal validity as a handwritten signature. Protecting them is essential:

• Absolute confidentiality : Don't share your e-signature or password. Memorize them and avoid saving them on your cell phone or computer.
• Strong passwords : Use strong combinations and avoid personal information such as names, pets, or dates.
• Two-Step Verification : Activate this security feature that the SAT already offers to protect your sensitive data.
• Beware of third-party apps : Only use official tools or those previously verified by the SAT. Don't provide your credentials to unregulated apps.
• e.firma portable : This mobile version uses dynamic keys and does not store sensitive files on the device, increasing security.

Connectivity is essential, but it must be secure:

• Prioritize your mobile data : It's more secure than open Wi-Fi networks.
• Avoid tax procedures on public Wi-Fi : Especially if they require the use of an e-signature or involve banking information.
• Use a VPN : If necessary, a virtual private network will encrypt your connection.
• Disable auto-connect : Prevents your phone from connecting to unknown networks without authorization.

Keeping your equipment up to date is one of the most effective ways to protect yourself:

• Update your system and apps : New versions often fix vulnerabilities that hackers could exploit.
• Install a reliable antivirus : Apps like Avast or TotalAV offer real-time protection against digital threats.

Controlling app permissions and using biometric authentication strengthens your security:

• Review your app permissions : If an app requests access to features it doesn't need, remove it or restrict those permissions.
• Enable biometric authentication : Fingerprint or facial recognition provides an extra layer of security and stores information locally.
• Delete your portable e-signature from the SAT Mobile app if you change devices : This prevents third parties from accessing your digital identity if you lose your phone.

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