Title :
A new secret key agreement scheme in a four-terminal network
Author :
Babaheidarian, Parisa ; Salimi, Somayeh ; Aref, Mohammad Reza
Author_Institution :
Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran
Abstract :
A new scenario for simultaneously generating a secret key and two private keys among three Terminals in the presence of an external eavesdropper is considered. Terminals 1, 2 and 3 intend to share a common secret key concealed from the external eavesdropper (Terminal 4) and simultaneously, each of Terminals 1 and 2 intends to share a private key with Terminal 3 while keeping it concealed from each other and from Terminal 4. All four Terminals observe i.i.d. outputs of correlated sources and there is a public channel from Terminal 3 to Terminals 1 and 2. An inner bound of the “secret key-private keys capacity region” is derived and the single letter capacity regions are obtained for some special cases.
Keywords :
private key cryptography; external eavesdropper; four-terminal network; public channel; secret key agreement scheme; secret key-private keys capacity region; single letter capacity region; Channel capacity; Equations; Markov processes; Mathematical model; Random variables; Security; information-theoretic security; secret key-private keys capacity region; source model secret key sharing;
Conference_Titel :
Information Theory (CWIT), 2011 12th Canadian Workshop on
Conference_Location :
Kelowna, BC
Print_ISBN :
978-1-4577-0743-8
DOI :
10.1109/CWIT.2011.5872145
