In spring 2016 the largest reform of EU data protection rules since 20 years was enacted. A major part of it consists of the so called “General Data Protection Regulation” (GDPR), which enters into application in May 2018 and will replace the data protection directive. It will be directly applicable in all of the EU member states. Due to its specific “legal nature” respectively the multitude of opening clauses the GDRP occasionally requires, which is unusual for a European regulation, national implementing- and/or executing measures. This diploma thesis analyses selected aspects of the GDPR and their implications for Austrian data protection law or more specifically on the Austrian Data Protection Act (DSG). At first, the most relevant legislation in terms of data protection (ECHR, CFR, DSG) will be presented and the relationship between the different legal sources will be clarified. After that, there will be a brief outline pertaining the formation process of the GDPR as well as an analysis regarding the selection of the legal form and its consequences. Finally, the main part of this diploma thesis focuses especially on the so called “rights of the data subject” and the possibilities of enforcing them. Concerning this matter, the prevailing legal position (including the relevant judicature) will be compared, if possible, with the legal status according to the GDPR. Thus, possible differences shall be highlighted.