<p>Mobile Distributed Real-Time Database Systems (MDRTDBS) in mobile environments experience significant challenges to sustain fault tolerance and security during transaction processing. The dynamic nature of mobile networks has made the design of fault tolerant, secure transaction processing solutions increasingly difficult. Herein, we introduce a new Queue-Based Adaptive Transaction Processor Framework (QATP-MDRTDBS) that utilizes intelligent queue management and adaptive fault recovery, along with integrated security monitoring that enhances the reliability of the entire framework. The framework includes a Fault Tolerant Execution Module that ensures reliable completion of transactions during node or network failures, along with an Intelligent Queue Manager that dynamically adjusts transaction priorities based on both the conditions of the mobile network and the urgency of the transaction. An Adaptive Resource Manager dynamically allocates resources to reduce latency and maximize throughput. Simulation studies demonstrate that QATP-MDRTDBS improves system availability by 18%, decreases recovery time by 22%, and reduces transaction failures by 19% over scheduling algorithms such as Rate Monotonic Scheduling and Earliest Deadline First. Overall, the framework provides a secure, efficient, and robust solution to real-time fault tolerant transaction processing for mobile, IoT, and edge computing applications.</p> Graphical abstract <p></p>