Naccache, David; Steinwandt, Rainer; Suárez Corona, Adriana; Yung, Moti Narrow bandwidth is not inherent in reverse public-key encryption. (English) Zbl 1378.94057 Abdalla, Michel (ed.) et al., Security and cryptography for networks. 9th international conference, SCN 2014, Amalfi, Italy, September 3–5, 2014. Proceedings. Berlin: Springer (ISBN 978-3-319-10878-0/pbk). Lecture Notes in Computer Science 8642, 598-607 (2014). Summary: Reverse public-key encryption (RPKE) is a mode of operation exploiting a weak form of key privacy to provide message privacy. In principle, RPKE offers a fallback mode, if the underlying encryption scheme’s message secrecy fails while a weak form of key privacy survives. To date, all published RPKE constructions suffer from a low bandwidth, and low bandwidth seems naturally inherent to reverse encryption. We show how reverse encryption can, in connection with and as a novel application of anonymous broadcast encryption, achieve high-bandwidth. We point out that by using traditional and reverse encryption simultaneously, a form of crypto-steganographic channel inside a cryptosystem can be provided.For the entire collection see [Zbl 1296.94004]. MSC: 94A60 Cryptography Keywords:public-key encryption; mode of operation; reverse public-key encryption; broadcast encryption PDFBibTeX XMLCite \textit{D. Naccache} et al., Lect. Notes Comput. Sci. 8642, 598--607 (2014; Zbl 1378.94057) Full Text: DOI