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Comment Finally. (Score 1) 88

"Another change Facebook is introducing is allowing users to modify the audience of a post after it's published, which they couldn't do before."

Finally. Why did this have to take so long to implement? I was considering deleting all posts I made that were viewable by everyone to clean up my profile for future job interviews. Luckily now I don't have to.

Comment Re:Really, no salt? (Score 2) 308

Your math is correct if you want to know how many entries it would take to cover the entire hash space.
However more advanced tables don't store all entries. (rainbow tables)

In short: they repeatedly hash a word and turn the hash into another word. After many of these iterations they store the word they started with and the word they end up with. If you want to look up a hash, repeatedly turn it into a word and hash it until you find a word that's in the table. They you can start off at the starting word of that chain and continue until you end up at the password you were looking for. http://en.wikipedia.org/wiki/Rainbow_table#Precomputed_hash_chains

It saves you a ton of storage space.

Comment unencrypted again (Score 1) 452

I was hoping Sony would have increased the security of their system. With everyone being forced to enter a new password they could at least encrypt it this time around.

It serves them right to still be this unconcerned with security to get hacked again.

Comment Re:Maybe 3-SAT isn't NP-complete (Score 1) 700

I believe it was based on the NP-completeness of the general SAT.

1) 3SAT is a special case of SAT so it's also NP.
2) A SAT problem can be reduced to 3SAT (add some variables to it: x||y becomes x||y||z && x||y||NOTz (similar for clauses with 1, 4, 5, 6... numbers of literals)
3) the reduction is clearly done in polynomial time

Comment Re:And how many people actually protect their phon (Score 1) 154

Yes the iPhone 4 has full device encryption but Android phones don't. A thief can root a phone and read all unencrypted data from it when connecting it to a computer. example: http://www.androidcentral.com/android-passwords-rooted-clear-text
There are a number of open issues about it on the google android site; ex. https://code.google.com/p/android/issues/detail?id=10809

Comment Re:Pretty simple. (Score 1) 728

Sure I'm already paying levies on blank media (€9 for a TB HD and €0.59 per DVD (yes that's 60% of the retail price)) here in Belgium.

However, it's still illegal to download or upload a song or movie.
The levy is just used to "compensate" for making copies of copyrightable material. Yes, for personal copies/backups of the data.

Comment Re:Talk about censorship (Score 2, Informative) 306

From the article of the original slashdotted article (http://www.washingtonpost.com/wp-dyn/content/article/2010/09/09/AR2010090907747.html)

"Shaffer's book was reviewed and cleared in writing by the Army Reserve earlier this year."

They did clear it. Afterwards they realized they forgot something and are paying for the damages of the first run.

Comment some comments (Score 1) 276

I'll post the same thing here that I posted on Digg yesterday. This was the first month Telenet was offering an Unlimited (fair use) subscription (the previous download cap was 100GB). I'm sure many people tried to download as much as possible just to see if there was a hidden download maximum and if they would get capped at a lower speed. The real mass downloaders are on different ISPs that have offered unlimited for many years now. And FTA: Telenet has not posted this information as a complaint of what they have to deal with, but to give us "a better picture of what exactly is possible with this new way of surfing." FYI Turbonet costs 61 per month for 30 Mbps download & 1,25 Mbps upload speed. Fibernet is a bit more expensive for 50Mbps

Comment Re:Only 98% lies. (Score 1) 547

I get up to 675KB/s download speed on my 6Mb/s connection (that's the maximum; when I'm downloading big files from a good server)

675 * 1.1 (ATM overhead) = 742KB/s = 5.94 Mb/s

Unfortunately when I upgraded to a 12Mb/s connection I remained capped at the previous speed because "I'm too far away from the central".

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