Enterprise-grade Security for Multi-Channel Banking Applications

Enterprise-grade Security for Multi-Channel Banking Applications

CASE STUDY

Business Overview

A leading Saudi bank partnered with NeST Digital to design and secure multi-channel banking applications spanning web, desktop, IVR, and Base24 platforms. Given the high-risk nature of financial transactions and regulatory scrutiny in the Middle East, security was mandated as a core, non-negotiable requirement.

NeST Digital was engaged to perform Threat Modelling (Design Phase), Secure Code Review (Development Phase) and to conduct penetration testing to ensure production-grade resilience.

Challenge

The bank faced multiple security and delivery complexities:

  • Threat Model multi-channels including web, desktop applications and Base24 applications.
  • Increasing attack surfaces & need to uncover vulnerabilities without full source-code exposure (Black Box Pen Testing)
  • Strict regulatory expectations for secure-by-design banking platforms
  • Requirement to validate fixes without impacting release timelines

Solution

The Team executed a security-first delivery and testing program:

  • Secure SDLC Implementation
    • Applied Secure-SDLC from the requirements phase onward
    • Embedded security checkpoints across design, development, testing and deployment.
    • Identified 80+ security risks from 150+ Threat Lists derived from the Threat Model and mitigated them by upgrading the architectural design of web, desktop and Base 24 applications.
    • Authored Secure Coding Guidelines for the respective technologies including C# (Web and Desktop), C (Base 24).
    • Implemented a Secure Code Review process with a Start Green Security Checkpoint.
  • Black-Box Penetration Testing
    • Conducted black-box penetration testing across all channels
    • Covered both thick and thin client architectures
    • Executed 240+ security test cases
  • Vulnerability Identification & Remediation
    • Identified 40 critical and high-severity vulnerabilities
    • Provided clear, actionable mitigation guidance for each issue
    • Worked closely with engineering teams to accelerate remediation
  • Validation & Hardening
    • Performed two additional validation cycles of Pen Testing post-fixes
    • Ensured vulnerabilities were fully resolved and no regressions introduced
    • Medium and low-risk issues were prioritized into future releases based on CVSS scores

Benefits

  • Hardened Multi-channel banking platforms across all customer touchpoints
  • Hardware vulnerabilities for ATM running BASE 24 applications helped Bank to work with hardware vendors to remediate and re-procure secure hardware.
  • Critical and high-risk vulnerabilities eliminated before production
  • Security embedded across the lifecycle, not bolted on at the end
  • Risk-based remediation aligned to CVSS impact and release planning
  • Enhanced regulatory confidence for a Middle East banking environment

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