XTS mode revisited: high hopes for key scopes?
Milan Bro\v{z}, Vladim\'ir Sedl\'a\v{c}ek
TL;DR
This paper reviews the XTS encryption mode used in storage, discusses its limitations, and explores potential future modes, emphasizing the impact of recent key scope changes in the IEEE 1619 standard.
Contribution
It provides a clear summary of XTS, analyzes the implications of the key scope change, and discusses possible alternative modes for storage encryption.
Findings
XTS mode has specific limitations for storage encryption.
The paper clarifies the impact of the IEEE 1619 key scope change.
Potential alternative modes for storage encryption are considered.
Abstract
This paper concisely summarizes the XTS block encryption mode for storage sector-based encryption applications and clarifies its limitations. In particular, we aim to provide a unified basis for constructive discussions about the newly introduced key scope change to the IEEE 1619 standard. We also reflect on wide modes that could replace XTS in the future.
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Taxonomy
TopicsCryptographic Implementations and Security · Chaos-based Image/Signal Encryption · Cryptography and Residue Arithmetic