Our protection method relies on periodic updates of … order to fix known bugs, to add security … how these two seemingly independent issues, i.e., piracy … as a result. We also introduce a novel … [p. 5] illegitimate software must be (roughly) as up-to-date … short secret that, together with the version number … … [p. 7] a correct update … makes this software … partially backwards compatible with out-of-date versions (i.e., it …
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