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Paper 2018/135
A note on the equivalence of IND-CCA & INT-PTXT and IND-CCA & INT-CTXT
Daniel Jost and Christian Badertscher and Fabio Banfi
Abstract
The security for authenticated encryption schemes is often captured by demanding CCA security (IND-CCA) and integrity of plaintexts (INT-PTXT). In this short note, we prove that this implies in particular integrity of ciphertexts, i.e., INT-CTXT. Hence, the two sets of requirements mentioned in the title are equivalent.
Metadata
- Available format(s)
-
PDF
- Publication info
- Preprint. MINOR revision.
- Contact author(s)
- daniel jost @ inf ethz ch
- History
- 2018-02-07: received
- Short URL
- https://ia.cr/2018/135
- License
-
CC BY
