Secure Change-Point Detection for Time Series under Homomorphic Encryption
Fuente:
arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Acceso en línea: | |
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| _version_ | 1866915719262765056 |
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| author | Mazzone, Federico Micali, Giorgio Pronesti, Massimiliano |
| author_facet | Mazzone, Federico Micali, Giorgio Pronesti, Massimiliano |
| contents | We introduce the first method for change-point detection on encrypted time series. Our approach employs the CKKS homomorphic encryption scheme to detect shifts in statistical properties (e.g., mean, variance, frequency) without ever decrypting the data. Unlike solutions based on differential privacy, which degrade accuracy through noise injection, our solution preserves utility comparable to plaintext baselines. We assess its performance through experiments on both synthetic datasets and real-world time series from healthcare and network monitoring. Notably, our approach can process one million points within 3 minutes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_05865 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Secure Change-Point Detection for Time Series under Homomorphic Encryption Mazzone, Federico Micali, Giorgio Pronesti, Massimiliano Cryptography and Security We introduce the first method for change-point detection on encrypted time series. Our approach employs the CKKS homomorphic encryption scheme to detect shifts in statistical properties (e.g., mean, variance, frequency) without ever decrypting the data. Unlike solutions based on differential privacy, which degrade accuracy through noise injection, our solution preserves utility comparable to plaintext baselines. We assess its performance through experiments on both synthetic datasets and real-world time series from healthcare and network monitoring. Notably, our approach can process one million points within 3 minutes. |
| title | Secure Change-Point Detection for Time Series under Homomorphic Encryption |
| topic | Cryptography and Security |
| url | https://arxiv.org/abs/2601.05865 |