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Your face is different from everyone else. It helps you enter buildings, open your bank account and unlock your iPhone.

However, capturing your face on camera is also the subject of recent data protection laws and a topic much mulled over by human rights activists who believe we are entering an Orwellian “Big Brother” world of control through technology.

Many technology experts believe the debate has detracted from the more positive aspects of facial recognition software. This involves the use of cutting edge technology that helps with the safety and security of Britain’s towns and cities. Indeed, they argue the debate should be about the technology first rather than the problems of data security and the dearth of relevant up-to-date legislation.

Cardiff paves the way

Cardiff is the first UK city to test facial recognition software, with the police and private sector companies among the early adopters of the technology. If the trials are successful, the technology could change the way the city’s police operate, helping to monitor crowds, fight fraud, control border immigration, tackle drug smuggling and combat knife crime. No bad thing, one could argue.

The facts as they stand:

  • When used properly, facial recognition software is accurate and it works
  • A real-time watch-list can be updated by the police on the move, alongside facial recognition technology on different devices
  • The technology can also be used in police vehicles and used with body worn cameras

At the recent BRIT awards, CCTV and mobile phone cameras were used in conjunction with a facial recognition database for scanning potential terrorist suspects on a watch list. Meanwhile, Customs and Border Protection (CPB) in the United States recently implemented the ‘biometric entry-exit system’ to identify passengers on some 16,300 flights every week.

Facial recognition technology – in a nutshell

Essentially, this is a software that correctly identifies faces – indeed, this technology has been developed to identify individuals out of tens of thousands of potential matches. Technology companies are now using artificial intelligence machine learning to recognise faces from huge data sets.

Facial recognition and ethics

Recently, amid the criticism by human rights groups about facial recognition technology, the Biometrics and Forensics Ethics Group (BFEG) commissioned a report about the trials carried out by the South Wales Police in Cardiff. This outlined a framework of ethical principles that should be taken into account when considering the deployment of live facial recognition or other automated biometric recognition technologies for policing purposes.

1. Public Interest. The use of this technology is permissible only when it is being employed in the public interest.

2. Effectiveness. The use of this technology can be justified only if it is an effective tool for identifying people.

3. The Avoidance of Bias and Algorithmic Injustice. For the use of the technology to be legitimate it should not involve or exhibit undue bias.

4. Impartiality and Deployment. If the technology is deployed for policing it must be used in an even-handed way. For example, it should not be used in ways that disproportionally target certain events, but not others, without a compelling justification.

5. Necessity. Individuals normally have rights to conduct their lives without being monitored and scrutinised. The technology should be used in ways that minimise interference with people engaging in lawful behaviour.

6. Proportionality. In addition to meeting a ‘necessity’ requirement, the technology should also meet a ‘proportionality’ requirement. That is, it can be permissible only if the benefits are proportionate to any loss of liberty and privacy.

7. Impartiality, Accountability, Oversight and the Construction of Watchlists. If humans (or algorithms) are involved in the construction of watchlists for use with the technology, it is essential that they be impartial and free from bias.

8. Public Trust. If the technology is to be used for policing it is important that those using it (either in operational deployments or trials) engage in public consultation and provide the rationale for its use.

9. Cost-effectiveness. Any evaluation of the use of this technology needs to take into account whether any resources it requires could be better used elsewhere.

Conclusion

No one would argue against any of the principles set down by the BFEG. Nevertheless, technologists hope that discussions will now be about the benefits of facial recognition for all members of society, including the value it can add for our safety and security.

The real debate needs to be about technology and how that can continue to develop, rather than implementing legislation to limit that technology and its uses.

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