VERIFIED CREDENTIAL

Advanced Secure Design

by The Missing Link
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John Tounoussidis

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ISSUED ON

20 February 2026

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This Credential does not expire

About

Our Advanced Secure Design course takes the next step in the Secure Design journey. While the fundamentals course covers common attack, exploitation techniques and fundamental security principles to adhere to, advanced course goes deeper. The lessons dive deep into full system threat modelling, correctly applying authentication, authorisation and step-up authentication concepts, input validation, principle of least privilege and examining how various systems should interact with each other in a secure manner. Participants take on a role of a nation state hacker to learn how commonly tried defensive techniques are bypassed and seemingly secure systems breached. The journey starts in the outer perimeter with breaching a web application, to compromising high value internal systems. The design mistakes are analysed, solutions examined and advanced secure design principles applied to take security knowledge to the next level.

Acquired Skills / Knowledge

A showcase of the key skills and technologies learned and applied.

Earning Criteria

Participant has demonstrated an understanding of:

  • Fundamental concepts of error handling and data protection via encryption.
  • How threat modelling should involve various systems and components as a whole.
  • Concepts of input validation and principle of least privilege.
  • Step-up and secondary channel authentication and correctly applying authorisation.
  • Advanced cross-site scripting attacks and defensive pitfalls.
  • Designing internal APIs to best protect against external threats.
  • Microservice design considerations to best protect against attacks and minimise damage in case of a breach.
  • Protecting internal tools and dangers of unmanaged languages when designing applications.
  • Deeper understanding of advanced exploitation techniques an attacker may employ and how to best protect and minimise the damage.

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Credential Verification

Issued by: The Missing Link
Credential Signatory: The Missing Link
ISSUED ON: 20 February 2026
Status: Active
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