2003 | OriginalPaper | Buchkapitel
Plaintext Awareness via Key Registration
verfasst von : Jonathan Herzog, Moses Liskov, Silvio Micali
Erschienen in: Advances in Cryptology - CRYPTO 2003
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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In this paper, we reconsider the notion of plaintext awareness. We present a new model for plaintext-aware encryption that is both natural and useful. We achieve plaintext-aware encryption without random oracles by using a third party. However, we do not need to trust the third party: even when the third party is dishonest, we still guarantee security against adaptive chosen ciphertext attacks. We show a construction that achieves this definition under general assumptions. We further motivate this achievement by showing an important and natural application: giving additional real-world meaningfulness to the Dolev-Yao model.