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- W3104073701 abstract "This thesis is dedicated to the analysis of modes of operation in the context of disk protection usage. Firstly, we give modes of operation secure in the Full Disk Encryption (FDE) model where additional data storage are not allowed. Inthis context, encryption has to be length preserving which implies length-preserving encryption. However, it is possible to use a value already present in the system, called a diversifier, to randomize the encryption and to have a better security.Then, we introduce two methods to analyse symmetric primitive in the very constraint Key-Dependent Message (KDM) model which is of interest for disk encryption because the encryption key can end up in the disk. It enables to analyse the KDM security of the Even-Mansour and the Key-Alternating Feistel constructions which are the basis of different block-ciphers. Moreover, knowing that data authenticity cannot be ensured in the FDE model because tag storage is not allowed, we relax this constraint which gives us two models: the Authenticated Disk Encryption model (ADE) and the Fully Authenticated Disk Encryption (FADE). A secure mode in the ADE model ensures data authenticity of a sector but can be vulnerable to replay attacks; and a secure mode in the FADE model ensures the authenticity of the entire disk even against replay attacks. Storage is not the only point to take into account, the read and write delays on a sector is a competitive argument for disk manufacturers since disk performances tightly depend on it and adding the computation of codes of authentication does not help. That is why, we tend to analyse incremental Message Authentication Codes: they have the property to be updatable in a time proportional to the corresponding modification." @default.
- W3104073701 created "2020-11-23" @default.
- W3104073701 creator A5016417507 @default.
- W3104073701 date "2019-07-15" @default.
- W3104073701 modified "2023-09-23" @default.
- W3104073701 title "Full disk encryption and beyond" @default.
- W3104073701 hasPublicationYear "2019" @default.
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