But no matter where you look there are thieves, miscreants and liars, and that was part of Lieberman's point: some of the security problems are technology related, but still too many of them are related to human nature, and human nature sometimes leads us to inaction, to taking risks, to saving money, to saving time.
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In the video above, Lieberman outlines some specific problems in this regard, primarily in the area of privileged accounts and privileged identities. In the former, he says we create all-too frequent, unfettered access to critical hosts (like the CEOs PC) under the assumption that just because someone on the help desk is on the help desk, he or she can have that unfettered and timeless access (including, potentially, after they've left the company). In the latter, there's a scale issue: hundreds or thousands of servers, applications and other hosts, each with their own password requirements and managed under a single domain. For both problems, it's easiest to just have a simple set of passwords that rarely change.
Naturally Lieberman (among a host of players) makes technology that can automate and manage all of this, but the more important aspect of all of this is that the answer lies not in the technology, but in whether companies see this as an important enough issue; whether they see the risk as great enough to invest the time and the money to implement complex solutions.