Approach to select the secrect key

[SindujaPrakash]

Hi !!

Could you tell me on what basis were the 3 secret keys defined? Like Xrandom can be a random distribution of any interval, but how did you just select 0 to 1. Similarly, on what basis were Xdirect and Xdiff defined?

[yu4u]

They are explained in Section 3.3. Regularizer Parameters.
For Xdirect, for each row, randomly set one element to 1 and set the other elements to 0.