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(Multi-input) \(\textsf{FE}\) for Randomized Functionalities, Revisited

  • 2026
  • OriginalPaper
  • Chapter
Published in:
Authors
Pratish Datta
Jiaxin Guan
Alexis Korb
Amit Sahai
Published in
Theory of Cryptography
Publisher
Springer Nature Switzerland

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Abstract

This chapter delves into the intricacies of randomized functional encryption (RFE) and its critical role in enhancing data security. It begins by introducing the concept of functional encryption and its evolution, focusing on the challenges and solutions related to randomized functionalities. The text explores the security requirements for RFE, particularly the need to protect against both malicious decryptors and encryptors. It presents a novel security definition for RFE that addresses these concerns and provides a counterexample to demonstrate the shortcomings of previous definitions. Additionally, the chapter discusses the construction of adaptively secure multi-input functional encryption (MIFE) schemes, highlighting their importance in real-world applications. The text concludes with a detailed analysis of the security properties of these schemes and their implications for future research in cryptography.
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previous chapter Zeroizing Attacks Against Evasive and Circular Evasive LWE
next chapter Adaptively Secure Streaming Functional Encryption
Title
(Multi-input) for Randomized Functionalities, Revisited
Authors
Pratish Datta
Jiaxin Guan
Alexis Korb
Amit Sahai
Copyright Year
2026
Book
Theory of Cryptography

Print ISBN: 978-3-032-12292-6

Electronic ISBN: 978-3-032-12293-3

Copyright Year: 2026

DOI
https://doi.org/10.1007/978-3-032-12293-3_10
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