Sometimes apps collect information that’s unexpected - for example, most torch apps track your location. If apps ask to access your contacts, photos or microphone, they may keep this information.
Even if you don’t let them access your contacts, they may get access anyway, if your friends allow access to contacts. So, our data travels between devices and apps.
Companies like WhatsApp and Instagram collect data about us from other companies they do business with – like the App Store or Google Play. Apps often keep working and collect data even when they’re not being used. Data also travels to companies we’ve never used! It’s hard to know where our data ends up or how long it stays there, even after we have deleted our original profile.
So, how does this happen? When we visit a website or use an app, small pieces of data (cookies) are placed on our device to track and record what we do. Some cookies are functional – for example, they remember our username and password. Other cookies help the company analyse its users and make services more profitable. There are also ‘third party cookies’ – these are used to sell our data to companies who want to advertise their products to us. For example, on your device, including Google, Amazon and Facebook. In this way, companies can track us even when we don’t use their services.
So, how can our data be used? Our data can be copied, analysed, stored, combined with other data, shared and sold to others – advertisers, companies, governments. Some of the companies who track us are ‘data brokers’ – their business is to buy and sell data. Data brokers collect data from different sites and then ‘profile’ individual users – they put each of us into groups with other people like us. Then companies can work out things about us that we haven’t shared.
Resources to use in teaching
- : read the BBC’s guidance on privacy and data collection (2 mins, )
- : guidance mapping the key points at which children’s data is collected and exploring the implications ()
- : read and watch this material about data harvesting by brokers (4 mins, )
- : a personalised series of short videos about privacy and the web economy explaining how and why we are being tracked online (2-3 mins each, )
- : a workbook of education activities focused on data, surveillance, and data justice.
Resources to use in your practice
- : Privacy evaluations aimed to help educators choose education technology for schools ()
- : an online education platform to teach children digital citizenship skills, including digital footprint management and cyber security management ()