defensecrypt.

Our service / From question to proof

Security testing
that follows
the evidence.

We examine your systems with the curiosity of a researcher and the discipline of a trusted testing partner.

Every engagement starts with a precise question: what could a determined attacker actually reach, control or expose? We build a safe route to the answer, validate it with evidence, and give your team a practical way forward.

01 / Two disciplines. One objective.

Understand the weakness.
Prove the consequence.

Research explains why a system breaks. Penetration testing shows how that weakness behaves inside your real environment. Together, they replace assumptions with a defensible view of risk.

VR

01 — Vulnerability research

Go beneath the symptom.

We study software, protocols and unusual system behaviour to find weaknesses that automated checks may not recognise. The goal is not merely to produce a crash or an alert. It is to understand the trust boundary that failed, the conditions needed to reproduce it and the impact an attacker could create.

  • Root-cause analysis
  • Protocol and application logic review
  • Exploitability assessment
  • Reproducible technical evidence
PT

02 — Penetration testing

Test the system as it exists.

We use realistic attack paths to examine the controls around your applications, infrastructure and identities. Findings are validated carefully and tied to business impact, so your team can distinguish an exploitable route from background noise.

  • Attack-surface discovery
  • Manual and tool-assisted testing
  • Chained attack-path analysis
  • Prioritised remediation guidance

02 / How it works

A controlled path
from scope to certainty.

Good testing is not a burst of scanning followed by a long list of alerts. It is a structured investigation with clear boundaries, active communication and evidence at every stage.

  1. 01

    Frame the question

    We begin with the reason for testing: a product launch, a material change, an assurance requirement, an unfamiliar behaviour or a wider concern about exposure. That context shapes the work.

    Outcome / Shared objective
  2. 02

    Define the boundary

    We agree targets, identities, environments, testing windows, excluded actions and escalation contacts. The rules of engagement make ambitious testing possible without losing control.

    Outcome / Written scope
  3. 03

    Build the attack model

    We map exposed components, trust relationships, roles and likely attacker goals. This produces hypotheses worth testing rather than a generic checklist detached from your system.

    Outcome / Test strategy
  4. 04

    Investigate and validate

    Automated coverage provides breadth; manual analysis provides depth. We reproduce suspicious behaviour, remove false positives and test whether individual weaknesses combine into a meaningful path.

    Outcome / Verified evidence
  5. 05

    Communicate as we go

    Material findings are not held until the final report. We surface urgent issues through the agreed channel, include enough context to act and stay available while your team investigates.

    Outcome / No surprises
  6. 06

    Report, explain, retest

    We deliver an executive view and technical detail, walk your teams through the attack paths, and verify remediations where retesting is part of the agreed engagement.

    Outcome / Closure

03 / Vulnerability research

When the answer
isn’t in a checklist.

Some questions demand more than a standard assessment. A component behaves unexpectedly. A protocol carries hidden assumptions. A patch fixes the visible failure but leaves the underlying state machine untouched. Research is how we turn that uncertainty into something your engineers can reason about.

ObserveUnexpected behaviour

Start with the anomaly, crash, exposure or design question.

ReduceMinimal conditions

Strip away noise until the trigger and trust boundary are clear.

ExplainRoot cause

Trace the behaviour through logic, state and assumptions.

ProveReal impact

Build the safest evidence needed to support a decision.

What research can answer

Is the behaviour exploitable? Which versions or configurations are affected? What privilege or access does an attacker need? Can existing mitigations interrupt the path? Does a proposed fix address the root cause? What evidence will engineering need to reproduce and resolve it?

The work may involve source-assisted analysis where code is available, black-box investigation where it is not, targeted fuzzing, protocol inspection, differential behaviour analysis, or careful construction of a proof of concept. The method follows the question.

04 / Penetration testing

See the route an
attacker would take.

The test follows realistic objectives through your environment. We look for the first foothold, the controls around it, and the combinations that turn a local weakness into a wider compromise.

01

Web applications

Authentication, session handling, access control, input boundaries, business logic, server-side behaviour and browser trust.

02

APIs

Object-level authorisation, token handling, tenant separation, workflow abuse, data exposure and inconsistent validation.

03

External infrastructure

Internet-facing services, exposed management surfaces, configuration weaknesses and paths from discovery to foothold.

04

Internal environments

Identity relationships, segmentation, privilege paths, credential exposure and the impact of an assumed internal foothold.

05

Cloud environments

Identity and access, public exposure, workload trust, storage permissions, secrets and control-plane paths.

06

Focused scenarios

A defined objective such as reaching protected data, crossing a tenant boundary or testing a suspected attack chain.

How we classify evidenceFrom possibility to consequence
Signal

A behaviour is worth investigating.

Weakness

The control failure is reproduced.

Exploit

A safe proof shows attacker utility.

Impact

The consequence is tied to your context.

05 / Deliverables

Useful to the board.
Usable by the engineer.

A report should help different people make different decisions without weakening the technical truth. We organise the output in layers, from risk and priority to reproduction and remediation.

A

Executive overview

The central risks, important attack paths, broad patterns and the decisions that deserve attention.

Leadership / Risk owners
B

Technical findings

Evidence, affected components, prerequisites, reproducible steps, impact, severity reasoning and recommended fixes.

Engineering / Security
C

Remediation map

A prioritised view of immediate containment, root-cause fixes and structural improvements across related findings.

Owners / Delivery teams
D

Readout and retest

A live walkthrough for questions and context, followed by clear verification of agreed fixes where included.

Everyone responsible

06 / Working responsibly

Depth with
clear boundaries.

Offensive testing has to be useful without becoming reckless. Before testing begins, we agree how far to go, what proof is sufficient, who to contact and when to stop. During the engagement, we minimise unnecessary access to data and avoid persistence unless it is specifically required and approved within scope.

01

Authorised

Testing begins only within an agreed scope and rules of engagement.

02

Proportionate

We gather enough evidence to prove the issue without creating avoidable impact.

03

Communicative

Critical observations and operational concerns move quickly through agreed contacts.

04

Reproducible

Evidence is documented so your team can verify the issue and its resolution.

07 / Common questions

Before we begin.

What do you need to scope an engagement?+

A short description of the system, the reason for testing, relevant environments, important dates, known constraints and the people who should be involved. If the scope is still unclear, the first conversation can be used to shape it.

Will testing affect production?+

The scope records the environment and acceptable level of impact. Where production must be tested, techniques can be adapted to reduce operational risk and specific high-impact actions can be excluded or handled through a separate approval route.

Do you only use automated scanners?+

No. Tools help create coverage and reveal signals at scale, but manual reasoning is essential for access-control failures, business logic, attack chaining, unusual protocols and understanding real impact. Automation supports the investigation; it does not replace it.

What happens if you find something critical?+

We follow the escalation process agreed during scoping. That normally means sharing a concise early warning with enough evidence to confirm the issue and begin containment, then expanding the detail in the final report.

Can you retest fixes?+

Yes, when retesting is included in the engagement. We reproduce the original condition, verify the control change and check for obvious alternate paths. The result records what was tested and whether the original risk is resolved, reduced or still present.

Start with the question

What are you
trying to prove?

Bring us a system, a concern or an unexplained behaviour. We’ll help turn it into a clear, controlled investigation.

Start a conversation

Let’s look closer.

Tell us a little about your project. We’ll take it from there.

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