The second test was done to evaluate the performance of requesting proxy credentials. We created different numbers of requests and for each case we measured the minimal and maximal time for handling a single request. We performed the same test 20 times and calculated the middle value of the 20 tests. Fig. 6 shows the experimental results, where the x-axis depicts the amount of the requests and the y-axis shows the minimal, maximal and average time to process a single request. The time is computed from the time point of generating the request message to the time point of the master node receiving the distribution message, meaning that the CA server has received the request message and sent the distribution message to the master node.