Attack against Ibrahim's Distributed Key Generation for RSA
                 B.Brzezniak, L.Hanzlik, P.Kubiak,  M.Kutylowski
                        Wroclaw University of Technology


Distributed RSA key generation protocols aim to generate RSA keys in such a way that 
no single  participant of the protocol can learn factorization of the RSA modulus. 
In this note we show that two recent protocols  of this kind (Journal of Network Security, 
Vol.7, No.1, 2008, pp.106-113 and Vol.8, No.2, 2009, pp. 139-150) fail their security target. 
We present an attack that can be launched by any protocol participant after terminating 
distributed key generation process.   

full text accepted for International Journal of Network Security