Basic terms
I realise that starting out with a list of definitions is enough to make your eyes go vacant but the Act, and people who talk about Data Protection, use these terms – so let’s get them out of the way.
- Processing
- Doing anything with data. Collecting it, entering it, storing it, copying it, making reports from it, sending it somewhere, sharing it, deleting it, analysing it, adding bits of it up, searching against it. Everything you can do with personal data is processing.
- Personal Data
- Data that is about a living person. There are lots of interesting legal debates people can have about what exactly this means, and some solicitors and judges would disagree. Basically if the information is about someone then it is personal data.
Also it doesn’t matter if the information is publically available somewhere else like the telephone directory or the electoral roll. It is still personal information and when you process it, you have to follow the eight principles. There’s a technical guide and flowchart (PDF) on the Information Commissioner’s site that helps you to define what is personal data.
There’s an interesting case that says to be personal data it has to be of ’significant biographical nature’ but generally if you want to get into the grey edges about what’s personal data and what is not, it is outside the scope of general guidance and you should consult a data protection consultant or your solicitor.
- Data Controller
- An organisation which is in charge of some personal data (i.e. you)
- Data Processor
- An organisation who you sub-contract or outsource a business process to, and as part of that you business relationship you pass them some personal data which you are the Data Controller of.
The key distinction is that a Data Processor only does what they are told to do with the data by you. They don’t have, or plan to have, their own independent relationship with the person whose personal data you passed to them.
Data Processors don’t need to be registered with the Information Commissioner and it is the responsibility of the Data Controller to make sure that the Data Processor complies with those eight principles. This is an important distinction and is best remembered by:
“you can outsource the process, but you can’t outsource the responsibility” - Data Subject
- A living person whose personal data you store.
- The Information Commissioner
- The person (Christopher Graham) who is responsible for enforcing the Act. He doesn’t do this alone; he has an office full of people (surprisingly) called the Information Commissioner’s Office or the ICO.
Disclaimer: This is general information only and I’ve tried to simplify the major parts of the Act to make it easy (I hope) to understand. This isn’t specific advice for you. If you’re looking for help with DPA and Information Security compliance then please contact me.

