Compact Lossy Trapdoor Functions and Selective Opening Security From LWE

ePrint Report: Compact Lossy Trapdoor Functions and Selective Opening Security From LWE

Dennis Hofheinz, Kristina Hostáková, Julia Kastner, Karen Klein, Akin Ünal

Selective opening (SO) security is a security notion for public-key
encryption schemes that captures security against adaptive corruptions
of senders. SO security comes in chosen-plaintext (SO-CPA) and
chosen-ciphertext (SO-CCA) variants, neither of which is implied by
standard security notions like IND-CPA or IND-CCA security.


In this paper, we present the first SO-CCA secure encryption scheme that
combines the …

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