A systems administrator at an international software company is configuring a telemetry platform that collects IP addresses, account usernames, and usage logs from clients residing in the European Union. A developer proposes applying a SHA-256 cryptographic hash to these identifiers prior to storage and processing without obtaining user consent, claiming that hashed data is fully anonymized and exempt from data privacy laws. Which of the following best evaluates this proposal under the General Data Protection Regulation (GDPR)?
- The proposal is non-compliant because pseudonymized data (such as hashed identifiers) remains personal data under GDPR and still requires a lawful basis for processing.Cevap
- BThe proposal is compliant because hashing permanently transforms PII into anonymized data, exempting the dataset from GDPR enforcement.
- CThe proposal is compliant because encrypting or hashing user network telemetry automatically reclassifies the records under PCI-DSS standards rather than GDPR.
- DThe proposal is non-compliant because hashing online network identifiers converts standard user telemetry into Protected Health Information (PHI).
Cevap
The proposal is non-compliant because pseudonymized data (such as hashed identifiers) remains personal data under GDPR and still requires a lawful basis for processing.
Under GDPR, personal data includes online identifiers such as IP addresses and account usernames. Replacing direct identifiers with cryptographic hashes is considered pseudonymization rather than full anonymization. Because pseudonymized data can still be linked back to individual subjects through cross-referencing or dictionary attacks, it remains fully subject to GDPR regulations and requires a lawful basis for processing.
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GDPR Scope and Pseudonymization vs. Anonymization