Court of Justice Guidelines: Access to Smartphone Data and the Principle of Proportionality

1. The fact

   The story originates in Austria where, as reported by Euronews and Altalex, local police seized a citizen's smartphone during an investigation for possession of a minimal amount of cannabis. Authorities attempted to unlock the device to search for evidence of dealing, despite the offense being classified as minor under national law. The suspect objected, starting a long legal process. The case came before the Tyrol Regional Administrative Court which, noting a possible conflict between internal regulations and EU law, referred a question for a preliminary ruling. The European procedural stage concluded by clarifying that authorities cannot indiscriminately access private data stored on electronic devices if the alleged offense does not reach a critical threshold of severity, regardless of technical difficulties encountered during the seizure.

2. 

   The rules at play

   The core of the issue lies in the interpretation of Article 15 of Directive 2002/58/EC (ePrivacy), which allows Member States to limit confidentiality only for essential purposes of justice. Articles 7 and 8 of the EU Charter of Fundamental Rights also apply, protecting private life and personal data protection respectively.

   1. The function of the Directive is to ensure that technology does not become a tool for disproportionate surveillance.
   2. The principle of proportionality (Art. 52 CFR) requires that the degree of interference with privacy be commensurate with the severity of the crime pursued.
   3. The consequence of violating these rules is the procedural inadmissibility of evidence unlawfully obtained.

3. What the jurisprudence says

   According to analysis by Altalex, supranational case law has consolidated a rigorous orientation that distinguishes between different types of data. While rules are broader for identifying data, the threshold rises drastically for data allowing precise profiling. Jurisprudence has clarified that accessing smartphone content is equivalent to a virtual home search, given the amount of sensitive information stored. In previous rulings, it had been established that only the fight against serious crime can justify access to traffic data. With the new guidelines, this principle is extended to physical devices: while not strictly limited to serious crime, a crime is needed that justifies the interference based on the principle of proportionality, validated by prior authorization from an independent authority.

5. Analysis drafted and verified with edit.legal

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8. What it teaches professionals

   1. Always challenge the proportionality of access to digital data if the crime does not justify such a level of interference.
   2. Verify the presence of prior authorization from a judge or independent authority, as autonomous police initiative is now strictly limited.
   3. Clearly distinguish between seizure of physical support and data extraction, requiring distinct justifications for the latter activity.

References: Direttiva 2002/58/CEArticoli 7 e 8 Carta dei Diritti Fondamentali dell'UEArticolo 52 CDFUE

Editorial oversight: Avv. Federico Papa·ICAMUpdated 11 October 2026Content drafted with AI support and subject to editorial source checks. Despite these controls, inaccuracies may remain: reports and rectification requests are welcome. Report a correction