Identity-based encryption is a very convenient tool to avoid key management. Recipient-privacy is also a major concern nowadays. To combine both, anonymous identity-based encryption has been proposed. This paper extends this notion to stronger adversaries (the authority itself). We discuss this new notion, together with a new kind of non-malleability with respect to the identity, for several existing schemes. Interestingly enough, such a new anonymity property has an independent application to password-authenticated key exchange. We thus come up with a new generic framework for password-authenticated key exchange, and a concrete construction based on pairings.
Swipe to navigate through the chapters of this book
Please log in to get access to this content
To get access to this content you need the following product:
- New Anonymity Notions for Identity-Based Encryption
- Springer Berlin Heidelberg
- Sequence number
Neuer Inhalt/© ITandMEDIA