søndag den 28. juni 2009

Twitter vs. facebook: Security concerns

In my 9-17 life, I am behind a corporate firewall with semi-restrictive content filtering. This usually does not bother me; It is only fair that only job-related surfing is done from work. And when it does get in the way of a job-related need, I whine a bit and find a way to get things done.

I noticed recently that our proxy blocks twitter but allows facebook. At first I thought this was weird - is facebook more safe or more needed for bankers to do their job? I thought not.

But after thinking some more I think I understand how this can make sense.

On facebook, I am only connected to people that I know or at least used to know. On twitter, I follow several people that I don't know at all except from their tweets and blogs.

My facebook friends don't publish many links - mostly just status updates, pictures and the occational youtube video. Twitter on the other hand is overflowing with links, most of them shortened so you can't see what site they link to before it's too late.

In addition to following people on twitter, the search feature makes it easy to follow topics. (I use TweetDeck for this.) That means that I can interact with even more people I don't know. This raises the risk of social engineering. (I of course think myself impervious to such stunts, but some of my collegues could be vulnerable :-).

As a service or a platform in itself, I would still maintain that facebook carries a greater risk because facebook apps could do be serving nasty content, and most apps require access to profile information that is not needed for the app. Thankfully facebook is moving away from this pattern, but ill-intended apps would of course continue to ask for full profile access just to complete a quiz, and many users will continue to grant it.

So in the end I wonder: Someone thought about this and decided to block twitter. Why did they leave facebook open?

fredag den 12. juni 2009

F# will contine to be freely available

I asked on twitter if anyone knew if F# would still be available for free now that it is being integrated into Visual Studio. There was no answer as such but David Morton suggested I ask Don Syme directly and share the answer.

So here it is:

Hi Tore

Free options will continue to exist, most likely through the VS shell. For example, we'll be continuing with our VS2008 plugin until the plans around a VS2010 shell finalize

We're unlikely to have a dedicated VS Express version for a while.

Kind regards

Good to know!
(I am not in a position to use F# at work since it is a Java shop, but it is comforting to know that I can use it for recreational coding without investing in a Visual Studio license.)

torsdag den 11. juni 2009

Matematikken bag krisen

Der er en interessant artikel i det seneste nummer af Finans om hvordan blind tro på matematiske modeller var en væsentlig årsag til at finanskrisen tog fart:

Hvis man har indsigt i modellerne og forstand på disse handler er det sikkert et forsimplet billede der vises i artiklen. Men udfra beskrivelsen lyder det egentlig som om en fysiker burde have kunnet se at der lå et feedback-loop på lur i derivat-cirkuset.