I have had a little disagreement with my IT guy. He says that when taking my laptop out in public, I should never type anything with passwords or confidential information. He says that someone can pick up my information. I say that I can’t believe that everyone in public is totally exposed. There must be some way to protect yourself while on a public network. Who is right?

A:

There’s no single correct answer. It’s true that thieves in public places can and do steal passwords and other sensitive information transferred over public Wi-Fi hotspots. But it’s also true that methods like Virtual Private Networks can mitigate this problem, and that most public hotspots are, just by the odds, unlikely to harbor these thieves at any one time. However, my advice is to avoid doing any sensitive tasks, like banking or stock trading, while using public hotspots. And, if you’re doing anything confidential on your company or home network remotely, use a VPN, which is like a secure tunnel through the internet.

Q:

I recently purchased a new iMac and am considering installing anti-virus/spyware/malware programs on it. Reader forums in MacWorld magazine say it’s not needed. A local newspaper computer columnist says he’s had Macs since the early ’80s and has never run an AV program and has had no problems. Other online computer advisers say Macs are always vulnerable and advise to run AV programs. Any recommendations here?

A:

No computer is inherently invulnerable to malicious software, and that includes the Macintosh. However, nearly every malicious program known is meant to run on Windows and simply won’t operate on the Mac operating system. The handful of Mac viruses and other malware that have been discovered are either proofs of concept, or have spread to very few users and done little or no damage. Most Mac users I’ve known don’t run third-party security software and haven’t had malware problems. So I don’t routinely recommend Mac security software.

There are two caveats, however. If you are running Windows on your Mac, you should install Windows security software, to run while Windows is in use. Also, Mac users are just as vulnerable as Windows users are to online scams, or to insecure public networks. So, even though you may never get a virus, you still have to be careful about doing sensitive Internet tasks via public hotspots or careless behavior like clicking on links sent you by unknown email senders.

Q:

My car has an audio jack that integrates any input into the sound system. I know that Kindle has a text-to-speech feature. Would I be able to use that feature via the audio jack in the car?

A:

Without having tested your car’s input jack, I assume the answer is yes. The Kindle has a standard headphone jack.

However, note that the text-to-speech feature works only on certain books, not all of them. Publishers have the right to allow or disallow it for any book.

Also, even if it’s enabled, it isn’t the same as an audio book, which is usually read by a trained narrator or by the author. Instead, it’s a computer doing the reading.

You can find Mossberg’s Mailbox and my other columns at the All Things Digital website, http://walt.allthingsd.com.

Ironic, yeah?

It’s not certain why WSGR prepared the presentation, but the document obviously applies to the close ties between Apple (AAPL) and Google (GOOG) and, if nothing else, offers insight into the “interlocking directorates” provision of the Clayton Antitrust Act of 1914 and just why the FTC might be concerned that the companies may be in violation of antitrust law by sharing four board members and advisers between them: Google CEO Eric Schmidt, Genentech (DNA) CEO Art Levinson, Intuit (INTU) chairman Bill Campbell and former vice president Al Gore.

According to the WSGR presentation, the Clayton Act stipulates that a person cannot serve as director or officer of two or more competing companies when the two are engaged in U.S. or foreign competition; each has $25,319,000 in aggregate capital, surplus, and undivided profits; and at least one has two percent in overlapping sales (note: while that $25 million figure was correct at the time the deck was prepared, it has since risen to $26,161,000). Now, Apple and Google clearly both meet the “aggregate capital, surplus, and undivided profits” condition. They probably don’t meet the second, but it’s conceivable that they might in the future as Google’s Android platform rises to challenge Apple’s iPhone in the mobile phone software and services market.

And if and when they should? Well, that leads to what WSGR describes as “occasion of sin”– a theological term that refers to circumstances that by their very nature lead to sin.

In other words, inevitable sin. And competition between the two companies is no absolution, either. As the presentation explains, there is “no safe harbor for de minimus competition.” Given the obvious overlaps between Google and Apple–between both products and directors–the two companies would seem to be heading for some sort of confrontation with the FTC. Especially if, as sources say, Google CEO Eric Schmidt has no intention of resigning from Apple’s board–even in the face of increasing government scrutiny of the company.

UPDATE: WSGR tells me the document was prepared for an internal training session. It had no explanation for why the firm published it on the Web.

UPDATE: As Danny Sullivan notes in the comments, Google has removed the cached version of the document — rather expeditiously. However, there’s still a cached version available over at Microsoft.

Clayton Act Section 8 Interlocking Directorates – Free Legal Forms