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On the security of public key cryptosystems with a double decryption mechanism

AutorGalindo, David; Herranz, Javier
Palabras clavePublic key encryption
Escrowed systems
Cryptography
Fecha de publicación2008
EditorElsevier
CitaciónInformation Processing Letters 108: 279- 283 (2008)
ResumenIn public key encryption schemes with a double decryption mechanism (DD-PKE), decryption can be done in either of two ways: by the user owning the secret/public key pair corresponding to the ciphertext, or by a trusted party holding a sort of master secret-key. In this note we argue that the classical security notion for standard public key encryption schemes does not suffice for DD-PKE schemes, and propose a new natural definition. Additionally, we illustrate the usefulness of the new security definition by showing that a DD-PKE scheme presented in the workshop Selected Areas in Cryptography 2005 is insecure under this augmented security notion. © 2008 Elsevier B.V. All rights reserved.
URIhttp://hdl.handle.net/10261/161158
Identificadoresdoi: 10.1016/j.ipl.2008.05.017
issn: 0020-0190
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