Protecting cardholder data and your reputation

Compliance with PCI DSS, the global Payment Card Industry Data Security Standard, is imperative if you are to minimize the risk of a data breach, avoid financial penalties – which are rising sharply – and ultimately continue to process card payments.

As a PCI Qualified Security Assessor (QSA) our primary role is to audit and validate e-commerce merchants’ compliance. We are also ideally placed to advise you on the likely overall cost and the steps you can take to minimize the time and resources associated with compliance.

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PCI DSS: 5 common mistakes to avoid

The message is clear: if you take card payments, PCI DSS applies to you. So why do some merchants remain non-compliant and risk hefty fines, reputational damage and potentially losing their ability to accept card payments? The following article highlights five common mistakes that we at Dionach regularly see in the course of our work as a PCI Qualified Security Assessor (QSA) and Forensic Investigator (PFI).

What we do

We provide the full breadth of QSA services from auditing, conducting a report on compliance (RoC), assisting with Self Assessment Questionnaires (SAQs) and consultancy to ensure the transmission, storage and processing of your cardholder data is fully secure and compliant with PCI DSS.

Many merchants and service providers have benefited from our expert guidance on practical ways to reduce the cost and complexity of their compliance requirements.

PCI DSS scope review

Dionach’s auditors can help to accurately scope your environment, defining which systems are in-scope for PCI DSS.

This is vital to ensure that the correct security controls are applied to each relevant system to achieve compliance – and not to those that are out-of-scope and would unnecessarily increase costs.

We work with you to understand and map your card payment data touchpoints – both technical and human – using detailed diagrams that allow us to confidently and accurately define the correct scope for your PCI DSS assessment.

Self-Assessment Questionnaire (SAQ) validation

One of the roles of our auditing team is to conduct on-site reviews in order to validate your Self-Assessment Questionnaire (SAQ). Compared to the option of simply self-assessing without the sign-off of a QSA, this provides you with added peace of mind that you are compliant and taking best practice steps to mitigate the risk of a data breach.

Reports on Compliance

Following an on-site assessment, we produce a comprehensive report on compliance that assesses your cyber security resilience and adherence to the necessary PCI DSS requirements.

We are responsible for issuing your Attestation of Compliance (AOC) to demonstrate compliance to your acquirer, payment brands, customers, and relevant stakeholders.






We deliver pragmatic advice focused on reducing the scope and cost of your compliance burden. Our consultants help you fully understand the cost – both short and long-term – and find the most efficient ways of complying so that you are free to focus on your core business.


As with any compliance exercise, we advise that your obligations should be viewed as an opportunity to truly place best-practice data governance at the heart of your organization. After all, the rules are designed to help you minimize the risk of potential business disruption and reputational damage in the event of a data breach.


We take the time to thoroughly understand your business before embarking on any compliance engagement.


Our consultants have worked in a multitude of different payment card environments. This combined knowledge will be invaluable to you as we help you understand and meet your PCI DSS compliance requirements.

Find out how we can help with your cyber challenge