Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror
×

Comment Re:How about... (Score 1) 636

You're both wrong. There are two things that can kill: power, and frequency.

To get from being healthy and alive to cooked requires a change in energy as lots of chemical bonds need to be destroyed. This requires work to be done, and the rate at which work is done is power. This is the traditional killer in most electrocutions. I say it's the power and not the work that kills, because if the power is low enough, you can probably survive indefinitely. Power is current*voltage, and it's measured in watts. A static shock is easily 10kV - air doesn't breakdown and conduct until you've got 3 million volts/meter, so the 5mm static shock you might get when you rub your feet on the carpet is around 15kV. But you didn't move all that much charge with that action, so the current is necessarily very low, as is the power.

If you want to know how fast a microwave will cook a hotdog, a great place to start is the power rating (watts) of the microwave. If you want to know how fast an electric oven will get to temperature, the right place to start is the power rating (watts) of the microwave. You two are arguing over whether it's the 120V that kills the hotdog or the 10A that kills the hotdog, when it's very clearly the product (1020W) that does it. That's why the wattage of the microwave is a selling point.

Frequency: You actually don't need to cook someone to kill them, which means without that much work/power it's possible to kill someone. The trick is inducing cardiac arrest. The frequency turns out to be much more important than the total work done. Tasers don't do much work, for instance, but they have killed people. Someone with more of a background in the electrochemistry of the nervous system and the heart could probably chime in more on this.

Comment Leverage the spinning platters to your advantage (Score 5, Interesting) 289

Everyone knows drives are most vulnerable when the heads are engaged, and the spinning platters should cause a single destructive action to potentially spread to the entire circumference. Why not do a write operation to the entire disk and hit it with a hammer during the write? Do that properly and the heads should go flying off in pieces into the platters, and the platters spinning with the loose head material should ensure nothing survives.

Comment Re:Well the only fool proof way... (Score 4, Insightful) 491

In practice, I'd run the sniffer on the machine if there was already one there. The absence of the sniffer revealing traffic does not mean there is no traffic, but if the sniffer shows traffic it's a safe bet it's real. Frankly I've yet to hear of any rootkits that would let the sniffer still work and not show the compromised traffic, I think it's more of an in-theory than in-practice. Because I mean, I suspect users who know how to operate sniffers are an edge case for botnet authors. If you've got the sniffer on the machine and can easily run it, why not? A fine alternative is setting up a span port (monitor port) on the switch. I work with managed switches all day, so I'm spoiled in this regard - I don't really think that's an option for the OP however, linksys switches tend to be pretty dumb.

Comment Re:It doesn't matter (Score 1) 359

One needn't compromise a router in order to gain access to it. They can be given access, after all.

There are thousands of network engineers and similar who work for ISPs, who routinely capture traffic as part of their jobs. It takes only one of them to disregard the rules/the law/their job and run a longer trace, or to run a trace to capture one specific thing and inadvertently capture passwords. Or worse yet, it takes only one of them to have their credentials or machines personally compromised.

It might be a bit farfetched, but once you start working in this business and you see how many engineers have pretty advanced credentials, you realize that any one of them could become a determined attacker and do quite a bit of damage -- or, a sufficiently determined attacker could get a job as a network engineer.

Comment Re:OK, so don't implement the security. (Score 1) 152

Perhaps what browsers should do is have a separate class of errors for whenever there's a password field in the form. Given how often people google, comment on blogs, or what-have-you, I'm not about to tolerate an additional click for every POST. But I will tolerate an additional click for every POST where one of the fields was a password.

Comment Re:Really a surprise? (Score 1) 493

Library calls cause context switches?

I thought the whole deal with libraries is that they get mapped into the local process space. I certainly don't have a 'libc', 'gtk,' or 'libffmpeg' process running, yet I'm running processes that use that library. Where is the context switching to, exactly?

If you had meant system calls, I don't think there are many (any?) things that are implemented as system calls that could have been implemented as cheap library calls, in other OS, unless I'm missing something.

Comment Re:That gets a lot done (Score 1) 303

<quote>If political activism is allowed in Egypt, it may unfortunately mean a conversion from a relatively secular government to an Islamic government which will be even less tolerant toward the Coptic Christian minority.</quote>

The same could have been said regarding Iraq under Saddam Hussein. Except Mubarak gets billions and Hussein got deposed and hung. What's the difference? The major ones I can think of involve Hussein wanting to default on Iraq's national debt and ideologically aligning himself against Israel.

Do you and others truly prefer secular tyrants to religious states that offer much more democracy and freedom of expression? I can understand siding with Mubarak and Hussein, or I can understand siding with the Brotherhood in Egypt and al-Sadr in Iraq, but if you side with one and not the other clearly there are significant motivating factors beyond this question of secular versus religious and democratic versus tyrannical rule.

Comment Re:0.027% (Score 1) 258

I don't think this contradicts anything - you are allocated a /48 prefix, but that gives you 16 bits for subnets and 64 bits for hosts in each subnet you create. The idea is you have 64 bits for the host and, if you're working within 1 /48, 16 bits for the network identifier. This lets people move subnets more easily (as only the prefix would need to change) and simplifies routing tables.

I never asserted that allocations were only /64s - that would be crazy and very obviously wrong - but I do believe that hosts are always 64 bits. Wikipedia for Subnetwork seems to state that you can subnet further, but you'll tend to run into problems because of the stateless autoconfiguration features - which are a core part of IPv6 - requiring a /64 bit prefix for the network.

Comment Re:WTF ISRAEL? (Score 0) 553

Why do people spend so much time saying the Palestinians should forsake violence and adopt non-violent tactics and yet spend so little time saying that the Israelis (Mossad, IDF, et. al) should forsake violent tactics and adopt non-violent tactics?

The reality is that dispossession of poor Palestinians dates back to the first time Ottoman deeds were sold in the early 20th century, the mass dispossession of Palestinians dates back to 1947, and the occupation of very large Palestinian population centers dates back to 1967. The majority of Palestinians for a majority of those decades were pretty nonviolent, and the first intifada was characterized by only symbolic violence (stonethrowing) which was met with lethal force, and it's only in the last decade and a half now that we've seen organized Palestinians resist in ways that *aren't* nonviolent.

I think a sad reality is that most of the world who is suffering resists nonviolently every day, and most of the world is absolutely blind to the suffering.

Comment Re:heh (Score 1) 715

I would argue that those who are concerned about offshoring (and that should be all of us in IT) should be looking towards unions. Unions are a way for workers voices to come together and be heard at the table. There are quite a few jobs that can't yet easily be offshored, and if we had an industry-wide union and thought it made (economic, political, practical) sense we could do something like demand that no more than N% of jobs be outsourced, and if they don't listen to us, ALL union workers could walk out.

To put it another way, you are implying that a union *must* attempt to alter their wages, and nothing else, and that it must attempt to raise the wages. Well, the way it should be, in my opinion, is that the union should be working for what we want: maybe that's higher wages because we think we can do that and keep our jobs, or maybe it's just a contract and a guarantee we won't be thrown out at the end of the fiscal year, or maybe it's just ergonomic chairs. The union should be working for what the workers want - if you think what the workers want isn't a productive thing to get, in a democratic union you can convince workers and make your argument rationally and if the majority agrees with you, well, hey, that's democracy.

To say nothing of the fact that workers should be responding to a globalized workforce with a globalized union! People should be paid and treated fairly, and I suspect there are a lot of workers in Mumbai who would benefit from the entire industry being union.

Now it's true that many unions aren't democratic and consequently don't really represent the workers. A lot of this is intentional and has to do with the Taft-Hartley act neutering the unions. But don't throw the baby out with the bathwater!

Slashdot Top Deals

Anyone can make an omelet with eggs. The trick is to make one with none.

Working...