We created a test last month, proofread it, and everything looked ready to go. We just noticed that one of the questions in the student view is now showing the answer. It's a Hill Cipher questions where we've entered the cipher as:

12 34 56 78

Directly underneath this, students should see 8 blanks in four sets of two for inputting their answer:

_|_ _|_ _|_ _|_

Instead students are seeing:

12 34 56 78
12 34 56 78

I think you want to be using the fill in the blank or free response question type. In the cryptography question type, the system will show the encrypted line and the system matches the answer from the student with the decrypted line (or vice versa). if the students are seeing the answer on the test, it probably means the event sup enter the answer into both lines. 

Currently, Cryptography-type questions hide only A-Z, a-z and the Spanish N. It will display everything else. If you plan to use Cryptography, do not use anything other than A-Z, a-z and Ñ. Use other question types such as Fill-in-blank or Short Answer.