Cyber Security: Looking Inwards (Gary Henderson) - ANME Blog

Cyber Security: Looking Inwards

Posted on: 1st Jul 2022 by: Gary Henderson

Often when looking at cyber security, and by association at data protection, we focus on the external risks. We focus on:

  • managing vulnerabilities which an external threat might use to access our systems and data
  • on managing and monitoring the areas on our network where an external threat may gain access
  • managing the security of our data solutions in relation to attempts at external access.

We look outwards for the dangers, and I suspect, given all we constantly see in the press regarding organisations suffering externally driven cyber incidents, this is becoming all the more common. Yet a recent article[1] regarding a disgruntled ex-IT staff member got me thinking that maybe we aren’t sufficiently considering the internal risks.

Accidental disclosure

I feel accidental disclosures of data go largely unreported and therefore any statistics in relation to how often they happen would be massively under-representative. Accidental disclosure might include where data is disclosed by accident in an email or via sharing functionality. The most common scenario is when the email is sent accidentally to the wrong person. Although sharing functionality in Google and Microsoft also allows for sharing files with the wrong person or for permissions to be misconfigured accidentally, allowing unintended users to have access.

We need to accept that mistakes will happen, and I am afraid this will only become more common as we get continually busier, so the challenges are twofold, to reduce the number of incidents, and to respond quickly to rectify things where they occur. On the preventative side, it’s about little prompts ahead of sharing externally and limiting permissions, especially external sharing. With responding, it’s about user awareness and the need to report issues or suspected issues as soon as possible.

Change management

The internal issue of change management relates to the potential for changes in settings, permissions, processes, etc., to have a negative impact on the school. In attempting to address an issue or a request, it is all too easy to simply go ahead and change a setting, but sometimes the unintended consequences can be problematic, to say the least. Here, it is about the appropriate change management processes to ensure that changes are approved and ideally tested before being deployed. This won’t stop those issues we couldn’t predict; however, it should ensure that those we can, we do, and that appropriate governance of change and accountability is in place. The right change management processes will also potentially help where changes are being made by an internal user, purposefully seeking to cause a negative impact, as it will be apparent that such changes were not approved.


As the earlier mentioned article highlighted, we also need to be conscious of the potentially disgruntled ex-employee who might seek, post leaving, to inflict damage. There is also the potential for an ex-employee to seek to use school data to their advantage post leaving. This highlights the vital need for appropriate off-boarding processes to manage the proper disabling and deletion of user accounts. There is also the need, particularly with IT staff, for any key passwords to be changed to prevent their future misuse.


Looking inwards at threats, we cannot forget the students. Some will be seeking to explore cyber security themselves through keen interest and may unintentionally cause issues. Others may be actively looking to cause problems, modify or access data. Here the critical measures needed relate to segmentation of your network to prevent students from accessing sensitive data and systems, and monitoring to try and detect any unusual or malicious activity from among the student body.

With those seeking to explore, I think there is great potential to harness and encourage their eagerness and ensure they operate within the school’s code of conduct, and local legal parameters. In a world where a shortage of cyber security professionals continues to be reported, it seems a missed opportunity to focus on sanctioning students where their actions were focused on learning, albeit having a potentially negative impact.

And for those students with malicious intent, I think there is clearly the need to sanction and warn them of the dangers of their current path, but equally, there is an opportunity to direct them onto a more positive pathway where their skills and interests might be able to be put to more constructive use.


The current press around cyber security almost encourages the external-facing focus. We are worried about hacking groups, nation state-backed offensive security operations, and other external threats. Therefore, it is all too easy to look outwards when there are equal risks already within our perimeter, risks which equally need to be considered.


[1] Bedford, C. 2021, Sacked IT technician admits he hacked into and wiped data from school systems, Leicestershire Live, viewed 27 May 2022,


Gary Henderson

ANME Ambassador

Director of IT at Millfield School
(also a trained teacher with 20+ years’ experience across secondary schools, further education and higher education, both in the UK and the Middle East.)

Written for Education Executive

Tags: Gary Henderson, EdExec,

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