Token-Controlled Public Key Encryption

Citation data:

Information Security Practice and Experience, ISSN: 0302-9743, Page: 386-397

Publication Year:
2005
Usage 12
Abstract Views 12
Citations 5
Citation Indexes 5
Repository URL:
https://works.bepress.com/wsusilo/249; https://ro.uow.edu.au/infopapers/2798
DOI:
10.1007/978-3-540-31979-5_33
Author(s):
Joonsang Baek; Reihaneh Safavi-Naini; Willy Susilo
Publisher(s):
Springer Nature
Tags:
Physical Sciences and Mathematics
book chapter description
“Token-controlled public key encryption” is a public key encryption scheme where individual message can be encrypted and sent to every receiver, but the receiver cannot decrypt the message until he/she is given an extra piece of information called a “token”. The token will not reveal any information about the messages that the sender originally sent and the communication overhead for releasing the token is very small. Also, it is possible that a single token can control the decryption of a number of ciphertexts sent to multiple receivers. We formalize security model for such scheme and show efficient and provably secure constructions based on known computational assumptions in the random oracle model.