Brazil’s Lei Geral de Proteção de Dados Pessoais (LGPD) is the country’s main privacy statute. The Brazil data protection law sets rules for collecting, using, storing, sharing and deleting personal data. It covers digital processing as well as paper records.
Apps, websites and APIs routinely handle names, credentials, payment details, location and sometimes health information. When that processing falls within LGPD’s scope, privacy controls and security controls have to work together.
Application security enters the picture here. An app that collects, stores or transmits personal data is part of the processing environment and LGPD expects that environment to be protected.
What Is Brazil’s General Data Protection Law (LGPD)?
The Brazil general data protection law is Law No. 13,709 of 14 August 2018, as amended. Article 1 states its purpose: regulating the processing of personal data, including by digital means, to protect the fundamental rights of freedom and privacy and the free development of personality.
“Processing” is defined broadly. It covers almost any operation on personal data, digital or not, from collection to deletion.
Duties fall on two processing agents-
- The controller makes the decisions about processing.
- The processor handles data on the controller’s behalf.
Oversight sits with the ANPD. Law No. 15,352/2026 turned it into a federal regulatory agency, the Agência Nacional de Proteção de Dados. It issues regulations, supervises compliance and applies sanctions.
Who Needs to Comply With LGPD in Brazil?
Incorporation in Brazil is not the test. Under Article 3, LGPD applies to processing by any individual or legal entity, regardless of the means used, its headquarters or where the data is stored, if at least one condition is met:
- the processing takes place in Brazil;
- the processing aims to offer or supply goods or services to or process data of, individuals located in Brazil; or
- The data was collected in Brazil, meaning the data subject was there at the time of collection.
A foreign company can therefore fall within scope. The facts decide, not the corporate address.
Article 4 of LGPD Brazil data protection law adds exceptions, including purely personal, non-economic processing, certain journalistic, artistic and academic purposes, public security and national defence and some data originating abroad.
What Types of Data Does LGPD Protect?
The Brazil data protection law separates ordinary personal data from a narrower, more protected category. Anonymized data generally falls outside the law unless the anonymization can be reversed with reasonable effort (Article 12).
Personal Data
Article 5 defines personal data as information relating to an identified or identifiable natural person. In digital services, that includes names, email addresses, phone numbers and account identifiers.
Technical data needs more care. An IP address, cookie, device ID or location record may constitute personal data when it relates to an identified or identifiable natural person, for example once linked to an account.
Sensitive Personal Data
This covers data on racial or ethnic origin, religious belief, political opinion, membership of a trade union or a religious, philosophical or political organisation, health or sex life and genetic or biometric data when linked to a natural person.
Apps that use facial data for biometric identification or authentication or that process health information may handle sensitive personal data and are subject to the specific rules in Article 11.
What Are the Key Requirements Under LGPD?
All processing must also respect the Article 6 principles, including transparency, prevention and accountability.
Lawful Data Processing
Each processing activity needs a legal basis. Article 7 lists ten, including consent, legal obligations, contract performance, credit protection and legitimate interests. Consent is not the default.
Sensitive data follows Article 11: specific, highlighted consent or a narrower set of bases where processing is indispensable. Legitimate interests are not among them.
Data Minimization and Purpose Limitation
Under Article 6, purposes must be legitimate, specific, explicit and disclosed to the data subject (purpose). Processing must fit them (adequacy) and use only relevant, proportional and non-excessive data (necessity). An app should not request location or contacts without a stated need.
Data Subject Rights
Article 18 rights in the Brazil data protection law include confirmation of processing, access, correction and anonymization, blocking or deletion of unnecessary or unlawfully processed data. Others cover portability under ANPD rules, deletion of consent-based data, information about sharing and consent and revocation of consent. These are defined rights, not an unlimited “right to be forgotten”.
Data Security and Protection
Security is an Article 6 principle and an Article 46 duty of the Brazil general data protection law. Processing agents must adopt technical and administrative measures capable of protecting personal data from unauthorized access and accidental or unlawful destruction, loss, alteration, communication or other improper processing. The law sets outcomes, not specific algorithms or products.
Data Breach and Incident Management
Under Article 48, the controller must notify the ANPD and affected data subjects of incidents that may cause relevant risk or damage. ANPD Resolution No. 15/2024 currently sets three business days from when the controller becomes aware of security incidents that affected personal data, with limited exceptions. Meeting that requires prepared procedures for detection, assessment, containment, documentation and communication.
What Are the LGPD Security Requirements for Applications?
LGPD contains no checklist of application-security technologies. Its security duty applies from the design phase of a product or service through implementation (Article 46(2)) and processing systems must be structured to meet security and good-practice standards (Article 49). The controls below are practical options, chosen according to the system, threat model and data sensitivity.
Data Encryption
Encrypting stored personal data limits the damage from lost devices, leaked backups or exposed databases. Keys belong in platform keystores or managed key services, not in app code. LGPD names no cipher, but Article 48(3) lets the ANPD consider whether affected data was unintelligible when assessing an incident’s severity.
Secure Data Transmission
Send all traffic over TLS, validate certificates properly and block cleartext connections. Pinning adds protection for high-risk APIs. TLS covers data in transit only, so APIs still need authentication and server-side validation.
Application and Code Protection
Obfuscation and code hardening make reverse engineering, modification and extraction of logic or embedded secrets harder. They do not make analysis impossible and they do not protect stored data.
Runtime Security
Debuggers, instrumentation frameworks and hooking let attackers alter a running app’s behaviour. Runtime controls detect or resist these techniques, which matters most for logins, payments and sensitive records.
Access and Authentication Protection
Pair strong authentication with backend-enforced authorization, sound session management and least-privilege access. Tokens should be short-lived, revocable and stored securely.
How Can Organisations Prepare for LGPD Compliance?
These steps support compliance work but do not replace legal advice.
Identify and Map Personal Data
Inventory what each app and service collects, where it comes from, why it is processed and on what legal basis. Record where it is stored, which third parties and SDKs receive it and how long it is kept. Article 37 requires processing records and Articles 15 and 16 generally require deletion once processing ends.
Assess Security Risks
Rank risks by data sensitivity and the harm a compromise would cause. Cover the whole attack surface: mobile clients, APIs, backends and cloud configuration. The ANPD can also require a data protection impact report (Article 38).
Implement Technical Security Controls
Match controls to the risks found. A banking app may justify runtime protection and strict token handling, while a simple content app may need much less. No single technology is mandatory.
Monitor and Review Security
Scan for vulnerabilities, run penetration tests, monitor for abuse and rehearse incident response. Revisit controls whenever systems, vendors or threats change. Article 50 contemplates privacy governance programmes with incident response plans, continuous monitoring and periodic review.
LGPD Compliance for Mobile Applications
A single mobile app can hold identity details, credentials, payment and account data, precise location, device-linked identifiers, biometrics, health information and the API tokens that unlock backend records.
It also runs on hardware the organisation does not control. Attackers can reverse engineer the app, repackage a tampered copy, run it on rooted or jailbroken devices or instrument it at runtime. Common weaknesses include insecure local storage, weak network security, poorly authenticated APIs and stolen tokens. On some platforms, malicious overlays and screen capture add further risk.
App-side protection is one layer. APIs, backend infrastructure, databases, authentication systems, access controls, cloud environments and operational processes need their own safeguards. A protected APK or IPA does not make an organisation LGPD-compliant.
Common Security Risks That Can Affect LGPD Compliance
A vulnerability is not automatically an LGPD Brazil data protection law violation. Exploited weaknesses, though, can cause reportable incidents and raise questions about whether Article 46 measures were adequate.
Insecure Data Storage
Personal data left in plain files, logs or caches can be extracted from a lost, backed-up or compromised device.
Weak Network and API Security
Weak certificate validation exposes traffic to interception. APIs with broken authorization can let one user retrieve other users’ records at scale.
Application Tampering and Reverse Engineering
Decompiled code can reveal endpoints, embedded secrets, configuration information and business logic. Repackaged copies distributed outside official stores can harvest credentials.
Compromised Devices and Runtime Attacks
Root access and instrumentation tools let attackers read app memory, bypass client-side checks and capture data before encryption.
Weak Authentication and Access Controls
Long-lived tokens, weak session handling and missing server-side authorization checks expose accounts and records to attackers.
Best Practices for LGPD Data Security
Protect Personal Data Across the Application Lifecycle
Build security from design, as Article 46(2) contemplates. Threat-model features, follow secure coding standards, test before release, harden deployments, patch during maintenance and delete or anonymize data when a product is retired.
Strengthen Mobile Application Security
Layer defences by risk: code protection, integrity checks, runtime defences, protected local storage and awareness of compromised devices. Each addresses a different threat. Treat them as risk-based choices, not statutory mandates.
Test and Monitor Security Controls
Combine automated scanning with manual penetration testing and fix findings by severity. Monitor production for abuse, re-test controls after significant app updates and keep incident playbooks ready for ANPD notification deadlines.
How DoveRunner Helps Protect Mobile Applications and Personal Data
DoveRunner is a mobile application security layer that helps organisations protect apps and the data they process. It does not certify or guarantee compliance with the Brazil data protection law. Nor does it replace legal analysis, privacy governance, consent management, data mapping, backend and identity security or incident management.
Application Protection and Code Obfuscation
On Android, DoveRunner encrypts native libraries and can add Dex string and control-flow obfuscation over ProGuard/R8. This makes analysis, modification and logic extraction harder, not impossible.
Anti-Tampering and Runtime Protection
Integrity checks detect modified code and resources and a certificate check flags repackaged copies. At runtime, DoveRunner detects debuggers, hooking and tools such as Frida, then terminates the app or triggers custom handling.
Root & Jailbreak Detection
Rooting and jailbreaking weaken platform isolation, giving privileged tools access to app files and memory. DoveRunner detects both, plus Android emulators, with configurable responses because not every rooted device is malicious.
Data and Communication Protection
It complements, not replaces, TLS and data encryption. On Android, it resists SSL pinning bypass, detects packet-interception tools and memory dumping and can obfuscate strings holding hard-coded secrets. iOS IPA sealing offers a Secure Storage option for on-device app data.
Anti-Screen Capture and Overlay Protection
Malicious overlays and screen capture can expose credentials and sensitive screens. On Android, DoveRunner can block capture, recording and mirroring, hide other apps’ overlays from Android 12 (accessibility overlays excepted) and detect keyloggers. iOS IPA sealing can block screen capture. Coverage varies by platform and OS version.
Frequently Asked Questions About Brazil’s LGPD
What Is Brazil’s General Data Protection Law?
The Brazil data protection law, known as LGPD, is Law No. 13,709/2018. It regulates the processing of personal data, including by digital means, to protect freedom, privacy and the free development of personality. It applies to public and private organisations, covers the data lifecycle from collection to deletion and is enforced by the ANPD.
Who Needs to Comply With LGPD?
Article 3 of the Brazil data protection law covers processing carried out in Brazil, processing aimed at offering goods or services to or processing data of, individuals in Brazil and data collected in Brazil. Foreign organisations can therefore be covered, wherever they or their servers are located. Article 4 excludes some activities, such as purely personal processing.
What Data Is Protected Under LGPD?
LGPD protects personal data, meaning information relating to an identified or identifiable natural person. Names, emails and account IDs qualify and device identifiers or location often do. Sensitive personal data, including health, biometric, genetic, ethnic, religious and political information, faces stricter rules. Properly anonymized data generally falls outside the law.
What Are the Main LGPD Requirements?
Each processing activity needs a legal basis and consent is only one option. Processing must respect purpose, necessity, transparency and the other Article 6 principles. Controllers must honour data subject rights, apply appropriate security, keep processing records and demonstrate accountability. Incidents that may cause relevant risk or damage must be reported to the ANPD and affected individuals.
What Are the Security Requirements Under LGPD?
Article 46 requires technical and administrative measures capable of protecting personal data from unauthorized access, loss, alteration and other improper processing, from product design through execution. Article 49 requires processing systems to meet security and good-practice standards. LGPD does not prescribe one technical stack, so safeguards should reflect the data, context and risk.
Does LGPD Apply to Mobile Applications?
Yes, when the app’s processing falls within LGPD’s material and territorial scope. An app that targets people in Brazil, processes their data or collects data while they are there will usually be covered. An app with no such connection to Brazil may not be. Article 3 and the Article 4 exceptions decide each case.
How Can Mobile Apps Protect Personal Data Under LGPD?
Use layered, risk-based controls. Minimise and securely store data on the device, encrypt communications with properly validated TLS and pair strong authentication with server-enforced authorization. Add secure coding, integrity protection and runtime defences where risk justifies them. Secure APIs and backends and monitor continuously. No single control satisfies LGPD alone.
What Are the Consequences of LGPD Non-Compliance?
After an administrative process, the ANPD can apply Article 52 sanctions. These include warnings and a simple fine of up to 2% of the private legal entity’s, group’s or conglomerate’s revenue in Brazil in its last fiscal year, excluding taxes, capped at R$50 million per infraction. Others are daily fines, publicizing the infraction, blocking or deleting data and suspending or prohibiting processing. Sanctions are not automatic.
