# Data security in mileage receipts > Understand how to protect sensitive information in mileage receipts and ensure privacy. **Author:** Marina Costa — Brazilian Tax & Compliance Specialist **Published:** 2025-09-20 **Updated:** 2026-06-13 **URL:** https://quilometragem.com/blog/data-security-in-mileage-receipts **TL;DR:** Understand how to protect sensitive information in mileage receipts and ensure privacy. - Understand how to protect sensitive information in mileage receipts and ensure privacy. - Data security is crucial in mileage receipts, which may contain sensitive information about employee locations and routines. - Quilometragem implements end-to-end encryption for all data in transit. - Personal and location information is protected according to LGPD and GDPR. ## Why mileage receipts are sensitive data Data security is a central—and often overlooked—topic when it comes to mileage receipts. These documents seem harmless, but together they reveal a great deal: frequent locations, travel times, and complete employee routines. In the wrong hands, that archive can expose personal patterns and even physical risks to those who travel. That is why treating mileage as protected data is not an overreaction but a best practice. Quilometragem was built on the premise that every record carries information that must be preserved, controlled, and handled transparently throughout its entire lifecycle. ## End-to-end encryption in transit All information that leaves the user's device and reaches the servers travels through end-to-end encrypted channels.[^lgpd-anpd] This means that even if someone intercepts the communication, the data stays unreadable without the correct keys. Encryption in transit is the first barrier against leaks and interception attacks. That care applies both to the initial trip log and to the generation and sharing of receipts. At no stage does location information circulate in plain text, significantly reducing the exposure surface. ## Compliance with privacy regulations Personal and location information is protected in line with applicable privacy regulations, such as GDPR in Europe and equivalent laws elsewhere. These frameworks require a legal basis for processing, a clear purpose, and respect for the data subject's rights. In practice, that translates into collecting only what is needed, using data strictly for the reimbursement purpose, and giving users visibility into what is stored. Compliance is not a decorative badge: it guides engineering decisions, from data minimization to retention policies. Following these rules means privacy is a design requirement, not an afterthought patched on later. ## The SHA-256 hash as a digital signature Each receipt includes a SHA-256 hash that works as a digital signature of the document. That value is calculated from the exact content of the receipt; any alteration, however small, produces a completely different hash. This makes it possible to immediately detect any attempt at fraud or tampering. For the company, this means trust: the receipt presented is provably the same one generated at the source. For the employee, it is protection against unfounded accusations, since the document's integrity can be verified mathematically and independently. ## Secure storage and backups Data is stored on secure servers with regular backups that ensure continuity even in the face of hardware failures or incidents. Backup is not only about availability; it is also about not losing tax evidence that must be kept for years. Well-planned redundancy balances two goals: preserving the records you need while respecting retention policies by discarding what no longer has to be kept. ## Access control and audit trails Access to data is controlled by strong authentication, ensuring that only authorized people see the information. In addition, audit logs record all relevant operations—who accessed what, when, and what they did. That trail creates accountability and makes it easy to investigate any anomalous behavior. Access control and logs work together: one limits who can act, the other ensures every action is recorded. Combined, they dramatically reduce the risk of internal misuse, which is often as dangerous as external attacks. ## The user in control of their own data Real privacy requires empowering the data subject. In Quilometragem, employees have control over their data and can delete old receipts according to company retention policy. That balance between individual rights and tax obligations is essential: you don't erase what must be proven, but you don't hoard what has already served its purpose. Giving users that control also strengthens the relationship of trust. When people understand what is collected and can act on it, adoption of the tool grows naturally. ## Transparency as the foundation of trust In the end, technical security only builds trust when accompanied by transparency. Clearly explaining what is collected, why, and for how long turns data protection from a legal obligation into a competitive advantage. Companies that communicate their practices clearly face less internal resistance and build a lasting privacy culture. Transparency in data handling is therefore the thread that stitches encryption, compliance, integrity, and control into a trustworthy end-to-end experience. ## Frequently asked questions ### Is location data encrypted? Yes, all location data travels over TLS 1.3 and is encrypted at rest using AES-256, meeting enterprise standards. ### Who can view employee trips? Only the employee, their direct manager and the finance team responsible for reimbursement, per the role rules configured in the workspace. ### Is the app LGPD compliant? Yes. Quilometragem records the legal basis, specific purpose and retention period, and offers on-demand data deletion reports. ## Sources - [LGPD — Lei Geral de Proteção de Dados](https://www.gov.br/anpd/pt-br/assuntos/lei-geral-de-protecao-de-dados) — Autoridade Nacional de Proteção de Dados (ANPD) (2026-04-28)