To achieve epoch confidentiality for a public-key updatable encryption scheme as in Definition 1, an adversary should be unable to distinguish the public-key component of the epoch key under which a ciphertext has been generated.
Nov 7, 2022
Our definition of epoch confidentiality is inspired by and can be viewed as achiev- ing key privacy [1] in public-key updatable encryption. Key privacy is ...
In this paper we formalise public-key Updatable Encryption (PKUE), a primitive so far studied formally only in the symmetric setting.
Nov 11, 2022 · In this paper we formalise public-key Updatable Encryption (PKUE), a primitive so far studied formally only in the symmetric setting.
Nov 7, 2022 · Defining UE in the public-key setting enables us to establish a new notion of security we call epoch confidentiality (EC) which considers the ...
Epoch Confidentiality in Updatable Encryption · List of references · Publications that cite this publication.
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Updatable encryption can support key/ciphertext update functionality, resist key compromise attacks, and be applicable to cloud storage.
To prove the confidentiality of an updatable encryption scheme, it is necessary to simulate the update queries for both challenge and non-challenge ciphertexts ...
Abstract. An updatable encryption scheme allows a data host to update ciphertexts of a client from an old to a new key, given so-called update.
Feb 1, 2024 · In USSE, a client can issue a single update token that permits the server to convert existing encrypted data from the old key to the new key.