Re: [WebDNA] Captcha question (and free code)

This WebDNA talk-list message is from

2009


It keeps the original formatting.
numero = 103467
interpreted = N
texte = --Apple-Mail-145-266079948 Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit The latest CAPTCHA techniques usually involve asking a question like, "What is one plus one?" or "What is the last name of the U.S. President?" Another effective technique is to display 4 or more images and ask the user to identify which one is the duck, for example. The more images you display, the less likely the automated bot will guess the right one. Of course, all CAPTCHAs are worthless against an actual human being. Many of my sites get comment spam that's actually posted by a human. On Aug 25, 2009, at 9:43 AM, Kenneth Grome wrote: > Do hackers these days use scripts that: > > 1- read the content of a web page > 2- extract strings like "two hundred eighty three" > 3- convert them into numbers like "283" > 4- enter these values into blank form fields > > ... so they can get past text-based captcha systems designed to > prevent forms from being submitted by hackers? --Apple-Mail-145-266079948 Content-Type: text/html; charset=US-ASCII Content-Transfer-Encoding: quoted-printable
The latest CAPTCHA = techniques usually involve asking a question like, "What is one plus = one?" or "What is the last name of the U.S. = President?"

Another effective technique is to = display 4 or more images and ask the user to identify which one is the = duck, for example. The more images you display, the less likely the = automated bot will guess the right one.

Of = course, all CAPTCHAs are worthless against an actual human being. Many = of my sites get comment spam that's actually posted by a = human.


On Aug 25, 2009, at 9:43 AM, = Kenneth Grome wrote:

Do hackers these days use scripts that:

1- = read the content of a web page
2- extract strings like "two hundred = eighty three" 
3- = convert them into numbers like "283"
4- enter these values into blank = form fields

... so they can get past text-based captcha systems = designed to prevent forms from being submitted by = hackers?
 =

= --Apple-Mail-145-266079948-- Associated Messages, from the most recent to the oldest:

    
  1. Re: [WebDNA] Captcha question (and free code) (Stuart Tremain 2009)
  2. Re: [WebDNA] Captcha question (and free code) (Donovan Brooke 2009)
  3. Re: [WebDNA] Captcha question (and free code) (Stuart Tremain 2009)
  4. Re: [WebDNA] Captcha question (and free code) (Stuart Tremain 2009)
  5. Re: [WebDNA] Captcha question (and free code) (Kenneth Grome 2009)
  6. Re: [WebDNA] Captcha question (and free code) (Clint Davis 2009)
  7. Re: [WebDNA] Captcha question (and free code) (Kenneth Grome 2009)
  8. Re: [WebDNA] Captcha question (and free code) ("Dan Strong" 2009)
  9. Re: [WebDNA] Captcha question (and free code) (William DeVaul 2009)
  10. Re: [WebDNA] Captcha question (and free code) (Kenneth Grome 2009)
  11. Re: [WebDNA] Captcha question (and free code) ( 2009)
  12. [WebDNA] Captcha question (and free code) (Kenneth Grome 2009)
--Apple-Mail-145-266079948 Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit The latest CAPTCHA techniques usually involve asking a question like, "What is one plus one?" or "What is the last name of the U.S. President?" Another effective technique is to display 4 or more images and ask the user to identify which one is the duck, for example. The more images you display, the less likely the automated bot will guess the right one. Of course, all CAPTCHAs are worthless against an actual human being. Many of my sites get comment spam that's actually posted by a human. On Aug 25, 2009, at 9:43 AM, Kenneth Grome wrote: > Do hackers these days use scripts that: > > 1- read the content of a web page > 2- extract strings like "two hundred eighty three" > 3- convert them into numbers like "283" > 4- enter these values into blank form fields > > ... so they can get past text-based captcha systems designed to > prevent forms from being submitted by hackers? --Apple-Mail-145-266079948 Content-Type: text/html; charset=US-ASCII Content-Transfer-Encoding: quoted-printable
The latest CAPTCHA = techniques usually involve asking a question like, "What is one plus = one?" or "What is the last name of the U.S. = President?"

Another effective technique is to = display 4 or more images and ask the user to identify which one is the = duck, for example. The more images you display, the less likely the = automated bot will guess the right one.

Of = course, all CAPTCHAs are worthless against an actual human being. Many = of my sites get comment spam that's actually posted by a = human.


On Aug 25, 2009, at 9:43 AM, = Kenneth Grome wrote:

Do hackers these days use scripts that:

1- = read the content of a web page
2- extract strings like "two hundred = eighty three" 
3- = convert them into numbers like "283"
4- enter these values into blank = form fields

... so they can get past text-based captcha systems = designed to prevent forms from being submitted by = hackers?
 =

= --Apple-Mail-145-266079948-- Clint Davis

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