The SSL protocol ensures the authentication of the master node and the CA server with an encryption of the commu- nication. However, like all other security solutions, SSL cannot guarantee the absolute security. For example, an attacker can listen to the communication, capture the message, and obtain the key to encrypt the communication with the help of cryptographic analysis. In this situation, the attacker could obtain the proxy credential. Considering this situation, a random message CA_Rand, which is generated by the CA server, is introduced for the proposed security framework. This random message is used to authenticate the entities of G-Hadoop as the fingerprint of them. The security analysis of this fingerprint will be discussed in the following subsections.