Advocatus Diaboli writes: Since the early days of TCP, port scanning has been used by computer saboteurs to locate vulnerable systems. In a new set of top secret documents seen by Heise, it is revealed that in 2009, the British spy agency GCHQ made port scans a "standard tool" to be applied against entire nations. Twenty-seven countries are listed as targets of the HACIENDA program in the presentation, which comes with a promotional offer: readers desiring to do reconnaissance against another country need simply send an e-mail.
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