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Information Theoretic Security for Broadcasting of Two Encrypted Sources under Side-Channel Attacks †
Bagus Santoso1, Yasutada Oohama1
1Department of Computer and Network Engineering, University of Electro-Communications, Tokyo 182-8585, Japan.
Entropy (Basel, Switzerland)
|December 3, 2020
Summary
This study introduces a framework for secure communication against side-channel attacks. A post-encryption-compression (PEC) method using affine encoders effectively reduces information leakage for one-time-pad encryption.
Area of Science:
- Cryptography
- Information Security
- Computer Science
Background:
- Secure communication is challenged by adversaries exploiting side-channel attacks.
- Adversaries gather information from ciphertexts and physical leaks (power, heat, EM radiation).
Purpose of the Study:
- To develop a theoretical framework for analyzing secure broadcasting of encrypted data against side-channel attacks.
- To propose and analyze a countermeasure against such sophisticated adversaries.
Main Methods:
- A theoretical framework for analyzing secure communication under side-channel attacks.
- Post-encryption-compression (PEC) paradigm applied to one-time-pad encryption.
- Implementation using affine encoders derived from linear encoders.
Main Results:
- Sufficient conditions derived for exponential decay of information leakage with increasing block lengths.
- The proposed countermeasure's performance is independent of the specific side-channel information leaked.
- Demonstrated effectiveness of PEC for enhancing security against side-channel adversaries.
Conclusions:
- The proposed framework and PEC countermeasure offer robust security against side-channel attacks.
- The method provides a general solution effective regardless of the physical leakage characteristics.
- This research advances secure communication protocols in the face of advanced persistent threats.
Keywords:
Shannon cipher systeminformation theoretic securityone helper source coding problemside-channel attacksstrong converse theoremMore Related Videos
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