API security between mobile applications and ERP

A mobile application should never connect directly to an ERP database. A secure API layer must own authentication, authorization, validation and audit logging.

Short-lived access tokens, a secure refresh flow and protected device storage are foundational. Each user should access only resources allowed by their role.

TLS, rate limiting, input validation and sensitive-data masking work together. Device loss and offline cache risks also require explicit controls.

Security does not have to slow the experience: caching, pagination and background synchronization can preserve both safety and performance.