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- W2895890509 abstract "Emerging Non-Volatile Memories (NVMs) are promising contenders for building future memory systems. On the other side, unlike DRAM systems, NVMs can retain data even after power loss and thus enlarge the attack surface. While data encryption and integrity verification have been proposed earlier for DRAM systems, protecting and recovering secure memories becomes more challenging with persistent memory. Specifically, security metadata, e.g., encryption counters and Merkle Tree data, should be securely persisted and recovered across system reboots and during recovery from crashes. Not persisting updates to security metadata can lead to data inconsistency, in addition to serious security vulnerabilities. In this paper, we pioneer a new direction that explores persistency of both Merkle Tree and encryption counters to enable secure recovery of data-verifiable and encrypted memory systems. To this end, we coin a new concept that we call Persistent-Security. We discuss the requirements for such persistently secure systems, propose novel optimizations, and evaluate the impact of the proposed relaxation schemes and optimizations on performance, resilience and recovery time. To the best of our knowledge, our paper is the first to discuss the persistence of security metadata in integrity-protected NVM systems and provide corresponding optimizations. We define a set of relaxation schemes that bring trade-offs between performance and recovery time for large capacity NVM systems. Our results show that our proposed design, Triad-NVM, can improve the throughput by an average of ~2x (relative to strict persistence). Moreover, Triad-NVM maintains a recovery time of less than 4 seconds for an 8TB NVM system (30.6 seconds for 64TB), which is ~3648x faster than a system without security metadata persistence." @default.
- W2895890509 created "2018-10-26" @default.
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- W2895890509 date "2018-10-20" @default.
- W2895890509 modified "2023-09-27" @default.
- W2895890509 title "Triad-NVM: Persistent-Security for Integrity-Protected and Encrypted Non-Volatile Memories (NVMs)." @default.
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