Stop Password Masking?

June 28, 2009 at 8:02 pm | Posted in Uncategorized | Leave a comment

I think Jakob Nielsen has this one wrong. Masking password fields may make it harder for the user, but having seen people log in to applications in live demos – i.e. with a whole bunch of bystanders – tells me that there is a place for this technique.

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A note on INNER JOIN and sqlite

April 29, 2009 at 12:20 pm | Posted in Uncategorized | Leave a comment

Compare

robert@forkel02:~/projects/lwt/trunk/lwt
14:11:15$ time sqlite3 devdata.sqlite "select distinct l.name from source_word_donor_language as swdl inner join source_word as sw inner join word_source_word as wsw inner join word as w inner join language as l on swdl.source_word_id = sw.id and sw.id = wsw.source_word_id and wsw.word_id = w.id and w.language_name = l.name where swdl.donor_language_id = 873046508145964;"
Imbabura Quechua (Quichua)
Yaqui
Otomi
Tzotzil of Zinacantan
Mapudungun
Q'eqchi'
Kali'na
Wichí [Matacoan]
Berber
Dutch
English
Ceq Wong
Indonesian
Japanese
Romanian
Seychelles Creole
Hawaiian

real 4m34.178s
user 3m59.379s
sys 0m32.766s

with

robert@forkel02:~/projects/lwt/trunk/lwt
14:10:43$ time sqlite3 devdata.sqlite "select distinct l.name from source_word_donor_language as swdl, source_word as sw, word_source_word as wsw, word as w, language as l where swdl.source_word_id = sw.id and sw.id = wsw.source_word_id and wsw.word_id = w.id and w.language_name = l.name and swdl.donor_language_id = 873046508145964;"
Imbabura Quechua (Quichua)
Yaqui
Otomi
Tzotzil of Zinacantan
Mapudungun
Q'eqchi'
Kali'na
Wichí [Matacoan]
Berber
Dutch
English
Ceq Wong
Indonesian
Japanese
Romanian
Seychelles Creole
Hawaiian

real 0m12.060s
user 0m12.017s
sys 0m0.048s

Wikipedia says the above SQL statements are equivalent. But that doesn’t mean an SQL engine will treat them equivalently.

Claim your online persona

November 11, 2008 at 9:43 am | Posted in Uncategorized | Leave a comment

Andy powell has an interesting hands-on post on the topic of claiming your online persona:
define:digital identity. What I especially like: he even gives recommendations!

wlan with WPA on ThinkPad T61p with Ubuntu 7.10

November 11, 2008 at 8:24 am | Posted in Uncategorized | Leave a comment

For some reason, i never got wlan with WPA to work right seamlessly on my ThinkPad T61p with ubuntu 7.10. So here’s a short writeup of what it takes.

  1. Stop the network
  2. Put the WPA network information in /etc/wpa_supplicant.conf (see man wpa_supplicant.conf for examples)
  3. Start the wpa supplicant running wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf
  4. Start the DHCP client running dhclient wlan0

Creating portable picture galleries from flickr photos

November 8, 2008 at 4:09 pm | Posted in Uncategorized | Leave a comment

Having been a flickr user for a couple of years now, my infrastructure for creating backups of the data stored at flickr grew more and more sophisticated. So finally I decided to polish it so that it can be used by others as well and put on google code.

LaTeX, eh?

May 6, 2008 at 8:15 am | Posted in Uncategorized | Leave a comment

\LaTeX

Fun with Alternative Names in Certificates

February 1, 2008 at 7:55 am | Posted in Uncategorized | Leave a comment

Yesterday we eventually got around to putting new certificates on our servers at work. And we tried to do it right. In particular we wanted the certificates to be valid for all DNS names, the server can be accessed with.

Easy! Use Alternative Names! So in addition to the Common Name we’ve had before, we put in all the other DNS names as alternative names. Bummer!

The result with Firefox 2.0.0.11 (on various platforms):

When trying the Common Name: The familiar popup

You have attempted to establish a connection with “<Common Name>”. However, the security certificate presented belongs to “<Common Name>”…

Note the funny twist with mentioning twice the same name.

When trying one of the alternative names, it worked well.

So the lesson we learnt: Add the Common Name as Alternative Name, too, and you’ll be happy.

web 0.5?

January 2, 2008 at 7:11 pm | Posted in Uncategorized | Leave a comment

Now I don’t want to bash this particular publisher – but looking at the website makes me fear the transition to the digital age will take a long time.

URLs are UI

October 3, 2007 at 4:30 pm | Posted in Uncategorized | Leave a comment

It’s been said before, but bears repeating: URLs are UI! And it must be stressed, URLs are not only interfaces for user-agents of the automated kind, because the location bar of a browser is a text input field!

Maybe lots of copies makes stuff understood, too, in addition to keeping it safe.

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