BestChange Security Audit
BestChange requires listed exchange services to confirm an independent security audit. I run that audit against OWASP ASVS Level 2 using black-box and grey-box testing, deliver a report you can submit to BestChange, and retest once the findings are fixed.
What the Audit Covers
Coverage follows OWASP ASVS Level 2
Authentication and Sessions
Signup, login, two-factor authentication, session lifecycle, and brute-force protection
Access Control and Business Logic
Authorization boundaries, access to other users' data, skipped exchange steps, and abuse of limits and rates
Input Validation and Injection
Handling of user-supplied data, injection, file uploads, XSS, and SSRF across exchange forms and orders
Cryptography and Data Protection
Storage and transport of personal and KYC data, secret handling, and TLS configuration
Configuration, Logging, and Errors
Server and framework settings, security headers, information leaks in responses, and logging of security-relevant events
APIs and Integrations
Public and internal APIs, webhooks, payment gateway integrations, and callback handling
How the Audit Works
Seven steps from agreeing the scope to verification by BestChange
- Together
Scope and Access
We agree on the boundaries, the environment, and the rules of engagement. For grey-box coverage you provide test accounts and a scope estimate: the number of REST API endpoints, the number of roles to test, and a general description of what the service does.
- On you
Auditor Approval
You tell BestChange that I will be your auditor and receive their confirmation.
- On me
Testing
I audit the security of the service using black-box and grey-box testing. I report critical findings as soon as I find them.
- On me
Report
You receive a report describing every finding with reproduction steps, a risk rating, and specific guidance on how to fix it.
- On you
Remediation
You fix the medium, high, and critical risk findings. Low-risk and informational items are left to your discretion.
- On me
Retest
I re-verify the affected areas and record the result in the final document, which confirms the issues are closed.
- On you
BestChange Verification
You submit the final report to BestChange for verification.
What You Get
Documents and an outcome
- An audit report that meets BestChange requirements
- Every finding described with reproduction steps and a risk rating
- Specific remediation guidance — what to change and how
- A retest of the fixes and a final document confirming that the issues are closed
- Answers for your development team on the recommendations and how to implement them
Track Record
Every service I have audited passed the BestChange requirement with my report. Not one was rejected over the quality or completeness of the report.
Discuss Your Audit
Message me or book a short call — we will go over your service, the scope of the audit, and the timeline.