ReCaptcha -- STOP SPAM, READ BOOKS!
Posted by coldtobi | 5 Jul, 2007, 23:15
Some captchas are well -- weak. Or better said: broken and not an obstacle for the robots. This is, because OCR is doing pretty well, and the obfuscation is sometimes not obsucre.
So why not choose images which have already failed in OCR?
Exactly this is the approach taken by reCAPTCHA. But where to take words, that failed in OCR? And how to avoid training the bots against this words? reCAPTCHA is refined their approach to also cover this topics:
They take words out of old bookes that are digitalized but not poperly OCRed, because the OCRing failed. They seperate words out of the books, disort them and give that puzzle to the user. They will always present two words: One which has already been decoded and one, which is not decoded yet. Only if both words are entered correctly, the captcha is solved.
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Blog and Website | Comments (1) | Trackbacks (0)
CSS Basics [german]
Posted by coldtobi | 5 Jul, 2007, 21:39Für alle die sich mal CSS einarbeiten wollen, das CSS Float Zeugs aber nicht richtig verstanden haben... Ja, ich gebs zu, wenn ich einmal im halben Jahr wieder CSSe, dann weiss ich auch nicht immer so genau, wie es denn genau gegangen ist.
Und im Augenblick ist es halt wieder soweit, denn ich möchte doch meinem Blog mal einen persönlicheren Touch geben. Und dass soll natürlich mit Style gemacht werden.
Achja, hier der Link:
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Netzfunde, German | Comments (0) | Trackbacks (0)
(Little) Endianess Guide for Atmel AVR
Posted by coldtobi | 5 Jul, 2007, 16:59As I frequently need that information, also frequently I forget it again. (Usually, the C-Compiler has to care about it, but if you have to take over e.g a serial line, you have to know it.
Atmel AVR Endianess Cheat Sheet:
Example Value: 0x0A0B
All 8-bt AVRs: Little Endian in Memory 0x0B 0x0A (*adr: 0x0B, *(adr+1): 0x0A)
AVR32: Big Endian in Memory 0x0A 0x0B
LittleEndian is popular at Intel CPUs,
Big Endianess e.g at Motorola.
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Electronics and Atmel AVR, Tips and Tricks | Comments (1) | Trackbacks (0)
Perpetuum Mobile Demonstration delayed....
Posted by coldtobi | 5 Jul, 2007, 15:40I just read, that the demonstration of the "free energy" perpetuum mobile has unfortunatly to be delayed.
The website http://www.steorn.com/orbo/demo/ tells, that they experience technical problems:
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The impatient Phisher
Posted by coldtobi | 5 Jul, 2007, 09:37
"Screenshot-translation: ebay sent this message to MustafaAydin(mustafali"). Your first and surname is a sign, that [the message is really from ebay]"
Today one mail slipped through spamassassin. However, my experienced eye immediatly discovered that the mail is -- again -- some silly phishing attempt....
Sometimes, I *really* think how stupid the spammers/phishers are. First, this is not my name (a simple parsing of the email address would usually give better results), then the date of the reception, the missing umlauts, etc... There is nothing right in this spam.
Date received:
" I transfered the money on July 4th. Where's my merchandize?"
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