An employee points to code on a screen at Hewlett Packard's cyber defence center in Boeblingen, Germany, 09 December 2014. (Daniel Naupold/EPA)

Shortly before Adm. Mike Mullen retired as chairman of the Joint Chiefs of Staff, I asked him what he saw on the ceiling on nights when he couldn’t sleep. He didn’t even pause. “Cyber,” he said. That was 2011. This is 2014, and it seems that Mullen’s ceiling has been moved to Sony Pictures Entertainment, which has been hacked, maybe by North Korea. Nobody seems to be able to do anything about it — not the U.S. government, not the cowed movie industry and certainly not the ravenous bloggers who have descended, vulture-like, for scraps of gossip. Soon, the hackers threaten, Sony Pictures will be picked clean.

The attack may have been an attempt to thwart the release of “The Interview,” a Seth Rogen comedy about a farcical attempt to assassinate the farcical North Korean dictator, Kim Jong Un. The hackers have stolen personnel and medical records and e-mails of the mortifying kind. They have also pirated five movies, stolen scripts and, in other ways, severely hurt the company. This story is not about whether Angelina Jolie is indeed a minimally talented prima donna or whether Jennifer Lawrence was underpaid; it’s about an attempt to silence political satire. The film, I’m told, is funny. The effort to ruin it is not.

And yet news organizations — including The Post — have fallen on this story like hyenas on carrion. The so-called mainstream media have daintily relied on intermediaries, mainly bottom-feeding blogs, so they can, as The Post did in an online headline, say the e-mails were “leaked ” — although, like cash dropped by fleeing bank robbers, they were, in fact, stolen.

The inevitable consequence of such hacking of both government and private accounts will inevitably limit what the public learns. My instructor in such matters is Dick Cheney, who once said that historians will be sorely disappointed by his files: “I learned early on that if you don’t want your memos to get you in trouble someday, just don’t write any.” From now on, a lot of people won’t.

The loss to history and therefore to understanding is immeasurable. I am currently listening to the audio version of Ron Chernow’s “Alexander Hamilton,” a book enriched by Hamilton’s own letters and records — and those of his contemporaries. But only a fool today would keep an honest diary or write candid memos. For some time, this rule has extended to e-mails, so now that Sony Pictures’ Amy Pascal and other executives are being chastised for their digital candor: Didn’t they know better? It is as if they’re responsible for their own hacking.

The U.S. movie industry is a financial and cultural behemoth. Last year it posted $31 billion in revenue , but several billion was lost to piracy. As for the films stolen by the hackers, they’re out there, somewhere on the Internet, where the digitally dexterous can find them. That’s a lot of tickets not sold, not to mention mountains of popcorn.

But the greatest loss, the most terrifying, is to privacy — to our sense of self and the context we provide ourselves and would like the world to share. We are all whole people, not thoughtless phrases snitched from the ether. This, more or less, is what Clarence Thomas learned from his Supreme Court confirmation ordeal. “It . . . showed me something that I will never lose,” he told his friend John Danforth, “and that is that 2 percent or 1 percent of 0.2 percent can always be used to destroy a human being when there are no barriers, when there is no perspective and no context.”

A digital mob courses through the Internet. The fear is palpable. The other Hollywood studios, like the townspeople in “High Noon,” are scared into silence. Who will the hackers turn on next? What will be revealed? The old rules are relics. The establishment press has been disestablished. Vandals set the pace, if not the standards. We rush to catch up: readers, eyeballs, hits. Make lists. Move fast. Sift the dirt for gold. Keep moving.

Sony Pictures threatens legal action for the use of its stolen stuff, but that won’t work. What’s needed is a code of honor, a return to the days when trafficking in stolen information was shameful. But the public feasts on celebrity news and revels in the humiliation of the rich and powerful. Someone is going to supply this stuff. So now all of Hollywood stares, terrorized, at their version of Mullen’s ceiling. Playing tonight: an updated “High Noon” with the sheriff, his secrets exposed, hiding under the bed.

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