Endless Wars in Cybersapce

I'm planning to do some research on threat intelligence in the next several months. For me, it's a brand new area, and hopefully, something interesting could be found this year.
Nowadays cyberattack is becoming more and more complex and subtle. An essential problem faced by defenders is, attackers know what they know, while they don't know what the attackers' plots are. Cyberspace is different from the physical world, in the regard that there's no clear boundary between attackers and defenders. In the physical world, we can build forts with walls and trenches. We can see where attackers are, and what weapons they have. When we are defeated, at least we know who attack us, and what is their target (no more than lands, treasures, and slaves). While in cyberspace, a perfect attack targeting information exfiltration leaves no clue that it ever exists. The key difference lies in the fact that physical property is exclusive. It can only belong to one person at a specific point in time. While in cyberspace, the most valuable property, information, can be copied without any cost.
It reminds us that maybe we shouldn't secure information in the ways we secure physical objects. We should share instead of hiding information, to ultimately protect it.
Well, I have to say I don't really understand what that means. But why not give it a try?

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