Recent and upcoming judgments of the Court of Justice of the European Union (CJEU) have resurfaced a much-debated topic on the legal limitations of law enforcement authorities and intelligence services under EU law in implementing surveillance operations. In its decisions, the CJEU has reinstated and at times remoulded its case-law on data retention, unearthing a variety of legal issues. This article aims to critically analyse the legal limitations of (indiscriminate) surveillance measures, the role of the private sector in the scheme, and the line between the competence of the Member States and that of the EU on national security matters. It also aims to remark on the latest developments on the reception of the decisions by the Member States and the EU legislator, as well as on the ongoing dialogue between the CJEU and the European Court of Human Rights (ECHR).

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数据保留和大规模监控的未来：司法基准的演变和争议

欧盟法院 (CJEU) 最近和即将做出的判决重新引发了一个备受争议的话题，即欧盟法律下执法机构和情报部门在实施监视行动方面的法律限制。在其裁决中，欧洲法院恢复并有时修改了有关数据保留的判例法，从而发现了各种法律问题。本文旨在批判性地分析（不加区别的）监视措施的法律限制、私营部门在该计划中的作用，以及成员国与欧盟在国家安全事务上的权限之间的界限。它还旨在评论成员国和欧盟立法者接受决定的最新进展，以及欧盟法院与欧洲人权法院（ECHR）之间正在进行的对话。