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$
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I will audit your crypto security with exact math and a full pentest report
shaofeng lin
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About this gig
PROFESSIONAL CRYPTOGRAPHIC SECURITY AUDIT + PENETRATION TEST
WHAT I AUDIT
1. Cryptographic algorithms and key strength (bit-level math)
2. SSL/TLS configuration and certificate chains
3. Source code for injection, XSS, path traversal, deserialization, SSRF, XXE
4. Dependency and supply-chain risks (SCA)
5. Key management and compliance (NIST SP 800-57, GB/T 39786-2021)
6. Business logic vulnerabilities
WHAT YOU GET
- Professional PDF report with clear findings and severity ratings
- Full computation worksheets for every cryptographic claim
- Actionable remediation guidance mapped to OWASP Top 10 and CWE Top 25
IMPORTANT
This is a defensive assessment only. I do not crack, decrypt, or exploit your data. All work is confidential.
WHAT I NEED FROM YOU
- The code, protocol, or certificate scope to audit
- Written authorization confirming you own or are permitted to test the target
Get to know shaofeng lin
shaofeng lin
Security Code Auditor and Vulnerability Assessment Expert
- FromChina
- Member sinceSep 2026
Languages
English
Cosmos Nexus provides professional security code audit and vulnerability assessment. We specialize in static code analysis, dependency scanning (SCA), web and configuration security, key management compliance, and business logic vulnerability detection. Our framework aligns with OWASP Top 10, CWE Top 25, CIS Benchmarks, and NIST SP 800-57. We support Python, Java, JavaScript, Go, and PHP, covering injection, XSS, path traversal, deserialization, SSRF, XXE, and cryptography flaws. Every report includes clear findings, severity ratings, and actionable remediation guidance.
FAQ
Can you crack or decrypt my data?
No. This is a defensive assessment only. I audit whether your crypto is secure, not break it.
Do you support Chinese national cryptography (SM2/SM3/SM4)?
Yes, fully supported, with GB/T 39786-2021 compliance mapping.
Is my data safe?
Yes. I do not collect raw plaintext keys. All computation is done locally and confidentially.
What format is the report?
Professional PDF, with full computation worksheets.
Why is your audit more expensive than a security scan?
A scanner only flags patterns. I verify each finding with exact math, prove exploitability in a sandbox, and give you a full remediation plan.
Do you offer ongoing monitoring?
Yes, the Premium package includes 1 month of monitoring. Extended plans are available on request.
