In recent years POS systems have become a significant target for cybercriminals. Security firm Trustwave recently reported that over a third of data breaches the company investigated last year involved intrusions into POS terminals. Weak passwords, especially those for VPNs (virtual private networks), SSH (Secure Shell) and remote desktop connections remained a leading cause of breaches, the company said.
Brute-forced remote access connections and stolen credentials were the primary vectors for POS intrusions in 2013, Verizon said in its own data breach investigations report in April.
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