Data re-identification methods are becoming increasingly sophisticated and can lead to disastrous data breaches. Re-identification is a key research topic for computer scientists as it can be used to reveal vulnerabilities of de-identification methods such as anonymisation or pseudonymisation. However, re-identification, even for research purposes, involves processing personal data. From this background, this paper aims to investigate whether reidentification carried out by computer scientists for research purposes can be considered GDPR-compliant. This issue is paramount to contribute to improving the state of knowledge concerning data security measures.