00846nas a2200157   4500000000100000000000100001000000100002008004100003100001600044700002200060700002200082245009200104300001400196490000700210520047100217       2013                            d1 aP. Zawadzki1 aZbigniew Puchała1 aJaroslaw Miszczak00aIncreasing the security of the ping-pong protocol by using many mutually unbiased bases  a569–5760 v123 aIn this paper we propose an extended version of the ping-pong protocol and study its security. The proposed protocol incorporates the usage of mutually unbiased bases in the control mode. We show that, by increasing the number of bases, it is possible to improve the security of this protocol. We also provide the upper bounds on eavesdropping average non-detection probability and propose a control mode modification that increases the attack detection probability.