We would like write branch logic based on a comparison of a randomly generated two-digit number (unique to each respondent) with an externally verifiable random number (e.g. first two digits of the NITS Randomness Beacon ). We would like to use the first two digits of the most recent NITS randomness pulse as our external random number (most recent full pulse string available here: [url] beacon.nist.gov/rest/record/last [/url]). Limesurvey would need to retrieve the full pulse string from the URL at the time the respondent arrives at the question, strip the pulse string of non-numeric characters and truncate it to two digits, and then compare it with a random number it has generated itself. Is this possible?

Any advice on how to do this or suggestions on better approaches would be greatly appreciated!

Hi, 
What do you want LimeSurvey to do?

1. You pass the full string by URL
2. LimeSurvey removes the non-numeric characters and and uses the first two digits.
That's not a problem.

and then compare it with a random number it has generated itself.

And now?
LimeSurvey generates a two digit random number (between 0 and 99) ?
Now we have two numbers.

And what to do now?
And what for?

Joffm




 

Joffm wrote:

And what to do now?
And what for?

 

The purpose is described as "write branch logic based on a comparison of a randomly generated two-digit number".
So different set of pages are displayed depending on the comparison.
I wonder how a two digit number 00-99 can be unique for every respondent. That would limit the amount of respondents to 100.