Password authentication is one of the widely used methods to achieve authentication for legal users and defense against intruders.

We believe that our work can be used to develop novel parallel military applications incorporating SBCs, and is useful for educating soldiers and end-users about the potentials (and dangers) of parallel processing.Ībstract-With the rapid development of internet technologies, social networks, and other related areas, user authentication becomes more and more important to protect the data of the users. We also present several novel applications for offensive and defensive cyberspace operations using SBCs and SBC clusters. Our results show that an 8-node Parallella SBC cluster can crack password files up to 5.95 times faster than a high end laptop, at roughly half the cost. We discuss common SBC architectures and present a case study in which two clusters of SBCs are used to crack canonically ' weak ' passwords encoded with bcrypt. While each individual SBC is not very powerful, a cluster of SBCs can greatly increase the computational power available for cyberspace applications down range for relatively low cost. The small form-factor of SBCs make them highly portable, allowing soldiers to easily transport individual units and clusters. In this paper, we discuss the use of SBC clusters to assist in cyberspace operations. The emergence of single board computers (SBCs) has enabled individuals cheap and portable access to multi-core architectures.

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