Generating different randoms valid for a day on different independent devices?

Posted by Pentium10 on Stack Overflow See other posts from Stack Overflow or by Pentium10
Published on 2010-05-26T13:39:56Z Indexed on 2010/05/26 13:41 UTC
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Let me describe the system. There are several mobile devices, each independent from each other, and they are generating content for the same record id.
I want to avoid generating the same content for the same record on different devices, for this I though I would use a random and make it so too cluster the content pool based on these randoms.

Suppose you have choices from 1 to 100.

Day 1

  • Device#1 will choose for the record#33 between 1-10
  • Device#2 will choose for the record#33 between 40-50
  • Device#3 will choose for the record#33 between 50-60
  • Device#1 will choose for the record#55 between 40-50
  • Device#2 will choose for the record#55 between 1-10
  • Device#3 will choose for the record#55 between 10-20

  • Device#1 will choose for the record#11 between 1-10

  • Device#2 will choose for the record#22 between 1-10
  • Device#3 will choose for the record#99 between 1-10

Day 2

  • Device#1 will choose for the record#33 between 90-100
  • Device#2 will choose for the record#33 between 1-10
  • Device#3 will choose for the record#33 between 50-60

They don't have access to a central server.
Data available for each of them:

  • IMEI (unique per mobile)
  • Date of today (same on all devices)
  • Record id (same on all devices)

What do you think, how is it possible?

ps. tags can be edited

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