Want To Test A Test No-one Has Ever Taken, or Ever Will Again?

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I love creating academic challenges which are forever changing, and where the challenge is forever challenging. For this we can create the same set of challenges but vary the content. So, I’ve developed a cipher challenge created, which will generate a unique challenge each time [link]:

I’ve done the calculations, and it is almost impossible to ever get the same set of questions, for each instance created.

I’ve set it up so that a teacher can copy and paste the challenge questions into a worksheeet, and include the answer (which would be taken out, of course). If I generate one, here’s what we get:

Q. For the following cipher (ASCII coding), determine the decoded string: %65%6D%75%6C%61%74%6F%72

Additional information:

a (%61) b (%62) c (%63) d (%64) e (%65) f (%66) g (%67) h (%68) i (%69) j (%6A) k (%6B) 
l (%6C) m (%6D) n (%6E) o (%6F) p (%70) q (%71) r (%72) s (%73) t (%74) u (%75) v (%76)
w (%77) x (%78) y (%79) z (%80) SPACE (%20)

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Prof Bill Buchanan OBE FRSE
ASecuritySite: When Bob Met Alice

Professor of Cryptography. Serial innovator. Believer in fairness, justice & freedom. Based in Edinburgh. Old World Breaker. New World Creator. Building trust.