ISO 27001 and TISAX® in a nutshell
Both standards define the requirements that an information security management system (ISMS) must meet. So, in a general way, both address the same set of issues. The generally applicable ISO 27001 standard was published by the International Organisation for Standard Organisation or ISO. The industry standard TISAX® (short for Trusted Information Security Assessment Exchange) defines requirements specifically placed on suppliers in the automotive industry; developed under the guidance of the German Association of the Automotive Industry (VDA), TISAX® is also part of the ENX Association’s commercial platform.
Put simply, the main difference between ISO 27001 and TISAX® is the scope – that is, the areas where either is applicable or valid.
In the case of ISO 27001 certification, companies can determine the scope themselves, within given limits. The standard describes general requirements for the introduction, implementation, operation, monitoring, control, continuity, and ongoing improvement of an ISMS. It also allows participants to select the area they would like to certify. That means companies can choose to have a certain site, individual product lines, or services certified under to ISO 27001 – or even the entire company, should they so choose.
This is not the case with TISAX®. Instead, TISAX® looks at the entire company structure and its information security processes. Another important difference: You will often hear “certification” used in combination with both ISO 27001 and TISAX®. But technically, there is no such thing as a certificate for TISAX®. In fact, TISAX® is more of a platform backed by automotive manufacturing associations from various European nations. Companies that want to operate as suppliers for the industry need to register for the platform and meet the requirements of an assessment on TISAX®. The automobile industry prefers to keep information on who meets the TISAX® requirements as information only among the participants. For this reason, companies are prevented from publicly advertising that they meet the requirements.
Since 2017, TISAX® was derived from ISO 27001 as a catalogue of criteria and questions for information security as it pertains to suppliers in the automotive industry. This makes the questionnaire on TISAX®, a kind of information security self-assessment and the audited areas direct descendants of the ISO standard. However, the standards increasingly diverge with each new version of TISAX®. The self-assessment is now in its fifth iteration – while at first glance the similarities are not as apparent as they once were, the relationship between both systems remains obvious.
Tip: You can view and download the current questionnaire on TISAX® on the ENX’s website.
There is no formal connection nor are there any interdependencies between ISO 27001 and TISAX®. The standards work fully independently of one another. Companies may meet the requirements of TISAX® and also have ISO 27001 certification. Or they may only meet one of the standards. However, there is potential for synergies: Any company that has successfully undergone a company-wide ISO 27001 audit will have little trouble passing TISAX®.
Despite all the similarities that the two systems share, a combined audit is not possible. This is due to each audit assuming a fundamentally different perspective. With ISO 27001, the auditors look at the risks and measures related to information security from the perspective of the company itself. When it comes to TISAX®, the focus is a different one: TISAX® aims at ensuring a secure supply chain for OEMs that expect TISAX®-compliant management processes from suppliers. Here, the perspective is that of the end customer.
There is no clear answer to this question. The level of difficulty and challenges of each system should be viewed on an individual basis. Both audits basically run the same testing model. In each case, both check: What measures does a company claim to have taken to ensure information security? How were the measures implemented? What evidence can be provided in support? Incidentally, management is responsible of all three questions. That is to say, information security is and remains a management task – whether your company is being audited according to ISO 27001 or TISAX®.
However, there are differences worth mentioning. Auditors of the certification on TISAX® will only question management and, at most, a company’s information security officer. When being audited for ISO 27001, on the other hand, a company may expect to have its employees questioned about specific measures and processes. Thus, the required effort to prepare your staff for auditing will be slightly greater. It also bears mentioning that an ISO 27001 audit generally encompasses a greater range of information security processes than TISAX® does. This means the questions don’t run quite as deep. If a measure can be demonstrated to have been implemented, the question is checked off the list. Audits on TISAX® on the other hand, also look at the maturity level of a given measure.
By the way: To help you keep your bearings when you’re being audited according to TISAX® and/or ISO 27001, we at DataGuard have put together two helpful “roadmaps”. These step-by-step guides will inform you of the deliverables that each step of either audit demands. Just click a below link to download your helpful guide now!
Yes, that is quite fair to say. ISO 27001 contains only one short paragraph explicitly mentioning data protection. On the other hand, TISAX® describes the requirements for data protection at great length in one of its three criteria catalogues. By way of background, TISAX® has one catalogue of criteria focusing on general information security, one on prototype protection, and a third on data protection. What is unique about audits on TISAX® is that the OEM determines whether all three catalogues will be central for the audited supplier, or a subset. The OEM can then specify the required maturity level of the information security process. The assessment ranges from 1 for “normal” to 3 for “very high”. In other words, if a company is audited according to the catalogue on TISAX® of criteria for data protection at level 3, the requirements will be considerably higher than for an ISO 27001 audit. When it comes to TISAX®, level 3 assessments always entail an intensive on-site auditing process.
Definitely! It’s advisable to do so for PR reasons alone, since companies are permitted to publish their ISO 27001 certificate, e.g., on their website in order to attest their level of information security and position themselves on the market. As stated above, this is not the case if you successfully pass the audit on TISAX®.
But then again, automotive suppliers don’t necessarily need ISO 27001 certification to operate as part of the supply chain in the industry. In this respect, only the TISAX® result is decisive. Still, exceptions tend to prove the rule, and so there are OEMs in the industry that will expect a supplier to prove compliance with ISO 27001 in addition to TISAX®.
Considering ISO 27001 certification beyond TISAX®? Discover how to enhance your information security credentials with our strategic ISO 27001 implementation roadmap. This essential guide provides a pragmatic approach to certification, detailing the necessary steps, team structures and deliverables.
While there are auditing providers that conduct audits according to both standards, the responsibilities for ISO 27001 and TISAX® do not overlap at all. By way of illustration, the ENX Association is solely responsible for accredited assessment results for the audits on TISAX®. For its part, the ENX Association accredits audit providers to conduct TISAX® audits. There are currently 14 accredited audit providers for TISAX® worldwide.
Responsibilities related to ISO 27001 are structured in an analogue way. In the UK the UKAS, as the relevant accrediting body, pulls the strings. As of 22.9., the UKAS web site identifies 31 certification bodies in the UK that will audit an ISMS. You can find an overview here.
Not necessarily, and not for all companies. As a general rule, ISO 27001 certification is recommended. In this age, every company should be able to prove compliance with ISO 27001 to be on the safe side in terms of information security. Therefore, the demand for related consulting services and ISO 27001 certification is as high the market over as you might expect.
This is different for companies that operate either exclusively or in part as automotive suppliers. We at DataGuard strongly advise automotive suppliers to take both audits together. To ensure your ISMS is on a sure footing, you should comply with all ISO 27001 requirements and bear certification of it. Automotive suppliers will require an audit on TISAX® on top.
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TISAX® is a registered trademark of the ENX Association. DataGuard is not affiliated with the ENX Association. We provide consultation and support for the assessment on TISAX® only. The ENX Association does not take any responsibility for any content shown on DataGuard's website.