Notes on the latest CAPTCHA Note draft

Here are my notes upon a perusal of the latest draft.


  1.  Sections 2.6 (Logic Puzzles) and 2.7 (Image and Video) are both implementations of a CAPTCHA challenge. Should they accordingly be moved to appear after section 2.2 (“Sound Output”), to bring together all of the CAPTCHA techniques discussed in section 2? Note also that 2.3 (biometrics), 2.4 (limited use accounts), and 2.5 (non-interactive checks), used individually or in combination with each other, do not involve any kind of CAPTCHA challenge.
  2.  Unless there’s work in a branch of which I’m unaware, it appears that we haven’t clarified the role of biometrics (section 2.3) in relation to CAPTCHA – and this is the subject of an open issue. I recall our discussing it at an RQTF meeting, but I don’t remember there being an agreed upon solution.
  3.  The rest of my comments are editorial, but I plan to undertake an editorially-focused reading of the draft when it’s closer to publication.


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