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- W3206679013 abstract "In an Attribute-Based Encryption (ABE) scheme the ciphertext encrypting a message μ, is associated with a public attribute vector x and a secret key skP is associated with a predicate P . The decryption returns μ if and only if P (x) = 1. ABE provides efficient and simple mechanism for data sharing supporting fine-grained access control. Moreover, it is used as a critical component in constructions of succinct functional encryption, reusable garbled circuits, token-based obfuscation and more. In this work, we describe a new efficient ABE scheme for a family of branching programs with short secret keys and from a mild assumption. In particular, in our construction the size of the secret key for a branching program P is |P | + poly(λ), where λ is the security parameter. Our construction is secure assuming the standard Learning With Errors (LWE) problem with approximation factors n. Previous constructions relied on n approximation factors of LWE (resulting in less efficient parameters instantiation) or had large secret keys of size |P |×poly(λ). We rely on techniques developed by Boneh et al. (EUROCRYPT’14) and Brakerski et al. (ITCS’14) in the context of ABE for circuits and fully-homomorphic encryption." @default.
- W3206679013 created "2021-10-25" @default.
- W3206679013 creator A5021759073 @default.
- W3206679013 creator A5082871561 @default.
- W3206679013 date "2014-01-01" @default.
- W3206679013 modified "2023-09-28" @default.
- W3206679013 title "Riding on Asymmetry: Efficient ABE for Branching Programs." @default.
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