2007-11-06 10:17 David Recordon: opening the social graph
David Recordon of six apart + openid @web expo 2.0 berlin, my notes: Social netorks are mammoths, social apps ahve a few cool features. SNs HAVE your freinds, SAs WANT to know who yur frienda are. Facebook allowed to write social apps INSDE FB. Google Opensocial allows to build social apps 'across' SNs. and it is booming. Open Platforms should not be about company politics but about everything working together. (case: instant messenger warss leading to miranda and the like, GAIM, etc. -> all IMs …
Read more on “Digitale Tage”
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2007-10-15 00:02 Dolphin's Float>>hash
While working on the hash book, I've run into a discrepancy I can't reconcile. I was looking at Dolphin's number hashes and, to make testing easier, I reimplemented Dolphin's Float>>hash in VW (remember that in Dolphin, aFloat is the equivalent of VW's aDouble). When I tested the reimplementation, I couldn't get the values to match. Unable to see what was going on by looking at the code, I went into a VW workspace and tried to calculate the hash of 3.25d according to my interpretation of Dolphin …
Read more on “Ten is a good number”
2007-10-08 03:27 Fon and free wifi making inroads into UK consciousness
This is great news! On top of the announcement fron Fon the other day that they're teaming up with BT to offer all their Total Broadband customers the chance to get a Fon wifi router (and share some of their wifi), McDonald's has just announced that they're going to offer free Wifi in partnership with TheCloud .Now, normally you have to pay for TheCloud access, so that's very nice indeed. It also means that I can sit in the much posher upmarket sandwich shop with my laptop next to McDonald's in …
Read more on “The Beta Test Blog”
2007-09-04 17:20 Last.Fm Starts Taking Musical Fingerprints
So I ve spent this afternoon watching my music collection be ˜fingerprinted by Last.FM s latest little tool. BY creating an audio profile of a musical track (a aural checksum if you like), and then taking the meta-data associated with this checksum, you can label tracks submitted. And if you have a lot of people with the same track, that pool of meta-data can be analysed to create a ˜definitive text for the track name, album and artist. For the textul data that isn't clear, Last.FM will be retur …
Read more on “blognation UK mobile”
2007-09-04 12:00 NSA@home - distributed FPGA MD5 cracker
Here's something fun to do with HD-video electronics... - NSA@home is a fast FPGA-based SHA-1 and MD5 bruteforce cracker. It is capable of searching the full 8-character keyspace (from a 64-character set) in about a day in the current configuration for 800 hashes concurrently. The cracker is built out of surplus Grass Valley HD video transform boards, scrapped by GV because of defects. A useful tool was developed to assist the board reverse-engineering effort. The chip design consists of a patte …
Read more on “MAKE Magazine”
2007-09-02 22:08 Put the User in Control Otherwise Things Fall Apart
One of the core tennets we ve had when designing social graph applications within Windows Live is that we always put users in control. Which means privacy features and opt out galore. Manifestations of this include You can t IM a Windows Live Messenger user unless they ve given you permission to do so. So IM spam is pretty much nonexistent on our network. At worst, there is the potential of gettig lots of IM buddy requests from spammers if you have a guessable email address but even that proble …
Read more on “Dare Obasanjo aka Carnage4Life”
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2007-08-31 22:31 Friday Rails Links
It's been a week full of Rails joy, and a little pain as well, but that's not to looked for in Rails itself, but just some code. Been working with attachment_fu this week. Basically tried out its S3 storage capabilities when I switched from a custom implementation. Pretty neato. I'm starting to dig S3 itself more and more. Mike Clark wrote a nice tutorial on the subject. In his newest tutorial on developerWorks, Bruce Tate writes about using RSpec for behaviour-driven testing. Good stuff, I'm lo …
Read more on “paperplanes”
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2007-08-30 10:52 Netbeans THE best ruby on rails IDE
I use netbeans 6, milestone 10 (get it here as my ruby on rails ide now. I'm a mac user, having moved from windows last year. I was gonna write a blow for blow comparison of netbeans against radrails, but I really see no point. I figured it's best just to tell you why netbeans' rails support is so creamingly good, but so you know I have evaluated both and textmate, firstly - here's some points about the other 2... Here's some groovy ruby code completion to wet your appetite. Click more to read t …
Read more on “Life on Rails - Home”
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2007-08-28 16:16 Counting stuff is really hard
I've never worked anywhere where the logs could be tallied well. Netscape, AOL, they had giant systems that slurped up the logs from the front ends and stuffed them into web-enabled databases. Every query took 90 seconds to run, half of them timed out. Forget ad-hoc queries or tossing a custom regex in. Sometimes the logs would break and it'd be weeks or months or never before they worked again. Sometimes there was just too much traffic to be able to count it all. More log events came in every 2 …
Read more on “Skrentablog”
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2007-08-27 14:24 *About Channelling From Lee Carroll
I just found this article and would like to share it here because it is a good explanation of what channeling is and explains how I get some of the good stuff. On my own I'm nowhere near smart enough or good enough to come up with most of what I write. Often when I'm in the mood to write about something I come up with a title then just tune in and GO. When I'm finished with an article I started as my own little idea (that would be the title) I look at the finished product and say WOW. I think mo …
Read more on “Breathing”
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2007-08-23 16:40 So Sorry!
So for about the last 18 hours I've been unable to login to post. Quite unfortunate actually. Here was the issue as I stated it on the Site5 Support ticket: " As of last night I cannot login to any of the Wordpress accounts I've created for my websites. I've checked the MD5 hashes for the passwords and those appear to be unchanged. As this issue is spanning 3 databases and 3 domains I'm wondering if this is a technical issue " In the end it came down to one thing.... " Hello, I just had to rem …
Read more on “Fleeing The Social Scene”
2007-08-23 14:13 URL Shortening: Hashes in Practice
Jeff Atwood : My guess is the aggressive URL shortening services are doing a simple iteration across every permutation of the available characters they have as the URLs come in. Each new URL gets a unique three character combination until no more are left.
Read more on “Michael Tsai's Weblog”
2007-08-22 06:10 Nate Lawson: Exploiting Error-Correcting Codes To Patch-Proof Software
Common problem in software protection: You have a subprogram that checks to make sure no debugger is attached to your code. Attackers patch the subprogram, or its callers, to avoid the check. You verify the subprogram and its callsites with a hash. Attackers patch the verification code, or its callers, to avoid the check. Repeat ad infinitum. Nate Lawson has two cool "mesh design" answers for this problem. The first is "hash and decrypt". A "check for a condition" is a boolean function. Patching …
Read more on “Matasano Chargen”
2007-08-21 07:01 In Case there is a bug....
(Today's title has two possible meanings, thanks to the verbal Sargasso of unclarity that is English) Katy King is one of the testers over in the managed world (and sometimes contributor to the BCL Team Blog ) who I manage to run across from time to time. The main reason is that she periodically finds results that seem unexpected or inconsistent, and she wants to ask if she is missing something. Now her track record is actually pretty good since pretty much all the issues she has raised are eith …
Read more on “Sorting It All Out”
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2007-08-20 23:30 VoiceCon: "SIP Security" by Cullen Jennings and Eric Rescorla
This afternoon at VoiceCon in San Francisco, Cullen Jennings (of Cisco and Area Director for the Real-time Applications and Infrastructure area of IETF) and Eric Rescorla (Network Resonance, security advisor to IETF RAI area and involved with TLS spec) gave a 3 hour tutorial on "SIP Security". Both Cullen and Eric (also known as "ekr") are extremely involved with IETF efforts on securing SIP, so they were definitely the ones to do this presentation. Cullen started out giving an overview of basi …
Read more on “Voice of VOIPSA”
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2007-08-20 13:07 A physician against national health care
Doctor Caryl Hyland hashes out the usual arguments against an American socialized health care system in a piece in the Press-Register. I think this is going to emerge as the greatest domestic debate during the Presidential election.
Read more on “Daily Dixie”
2007-08-18 15:29 On On!
Fox News is on a roll lately with "News that is so old it's not really news anymore". They have THIS article up about a running group called the Hash House Harriers. These guys have been around for since World War I - not exactly a start-up organization. With the motto "A Drinking Club with a Running Problem" you can imagine that the events are somewhat, shall we say - entertaining. Although in our case, all drinks were consumed after the run was over. There are literally hundreds of Hashes arou …
Read more on “We have no idea what we are talking about!”
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2007-08-17 22:21 VTOs, RTOs and GetHashCode() -- oh, my!
Introduction Checking out a new blog today [ Davy Brion's Blog ] I stumbled across a very nice entry about Implementing A Value Object. Go read that now if you don't know what a value object is, what immutable means or why it's good. Identity is who you are What I want to talk about is GetHashCode() as used with value-type objects (e.g. struct in C#) but to do that, I really need to talk about the difference between reference-type objects ( RTO s from here out) vs. value-type objects ( VTO s fro …
Read more on “Marc's Musings”
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2007-08-17 02:01 TFS API: Determining if an edited file has changed
A few times over the last several months, the question has come up regarding how to determine whether a file on disk that is being edited is different that what is checked into TFS version control. Folks looking at the PendingChange object have asked about the difference between the two hash value properties. If you query for the pending changes in the workspace using GetPendingChanges() (or QueryPendingSets() if you don't want all of the pending changes for the workspace), you'll get an array …
Read more on “Buck Hodges”
2007-08-16 19:15 We Worship MD5, the GOD of HASH
For some time I had been looking for a mutual exclusion algorithm that satisfied my complete list of desirable properties. I finally found one--the N!-bit algorithm described in this paper. The algorithm is wildly impractical, requiring N! bits of storage for N processors, but practicality was not one of my requirements. So, I decided to publish a compendium of everything I knew about the theory of mutual exclusion. The 3-bit algorithm described in this paper came about because of a visit by Mic …
Read more on “Skrentablog”
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2007-08-15 16:33 How to Break Asterisk
Just to show that VoIP security is not all about SIP, researchers Himanshu Dwivedi and Zane Lackey from iSEC Partners have produced some interesting material on vulnerabilities in IAX, which they just presented at the recent Black Hat conference. IAX (pronounced eeks) as you may know, is a proprietary protocol often used to connect together Asterisk servers for the purposes of call routing. Implementors say that it is simpler than SIP, and also tunnels through firewalls better than SIP, thanks t …
Read more on “Voice of VOIPSA”
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2007-08-15 10:00 Talks I Want See at SD
The call for papers for Software Development 2008 West is now live. What follows are abstracts for some talks that I am not giving, but that I very much hope someone else will present. If anyone feels like submitting one of these under their own name, I'll champion it when the advisory board goes over the submissions. Intro to Ruby Ruby is the fastest growing programming language of the new millennium. Through interactive exercises, this full day, hands on tutorial will bring programmers from ze …
Read more on “The Cafes”
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2007-08-14 22:40 Solutions from the road: Changing lots of passwords at once
In the first two articles in the series, we chose to use existing tools in a non-traditional way in order to solve a problem. This time, we're going to use an often overlooked tool exactly as it was meant to be used. Here's the scenario. A group of related servers is managed by a group of system administrators that all have root access. If a system administrator leaves the company (for any reason), they are required to change the root password. The new password needs to be the same on each host, …
Read more on “Red Hat Magazine”
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2007-08-13 22:20 Comprehensions in Ruby
Now, this is totally awesome. Jay found a way to implement generic comprehensions in Ruby. In twenty lines of code. It's really quite obvious when you look at it. An example: (1..100).find_all &it % 2 == 0 %w 'sdfgsdfg foo bazar bara' .sort_by(&its.length).map &it.reverse.capitalize %w 'sdfgsdfg foo bazar bara' .map & :to_sym %w 'sdfgsdfg foo bazar bara' .map &it.to_sym Now, the last two lines are what I like the most. The Symbol to_proc tric is widely used, but I actually think the comprehensio …
Read more on “Ola Bini on Java, Lisp, Ruby and AI”
2007-08-11 17:52 JRuby and Rubinius Under Gemstone
Neat news from InfoQ. I got to visit Gemstone when I was in Portland for OSCON. Long story short, if you want object databases for your Rails apps, it'll be easy very soon. This is vitally necessary for complex problem spaces such as international shipping and warehousing. It may also represent a much better model for Web application persistence in general. I've blogged about this, Evan Weaver spoke about it at RailsConf 07, and DHH once commented also that he doesn't like databases and essentia …
Read more on “Giles Bowkett”
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