Encrypted Procedures

Maple 2018 lets you encrypt procedures. An encrypted procedure acts and behaves like any normal procedure in Maple, but it can not be viewed or debugged. This provides a way for professional users to share executable procedures while protecting their IP. 

The following defines a procedure that implements a block game as described at "http://rosettacode.org/wiki/ABC_Problem#Maple". The procedure is then saved into a repository file called "abc.mla". 

After executing the code above we can call the canSpell procedure to test what words can be spelled with the given blocks.  

Normally the statements of a procedure can be seen via commands such as showstat and eval in Maple. This is true for this procedure too because it was just defined. Note: option encrypted only takes full effect when the procedure is loaded from a library, not when it was just entered from source. 

 

Let’s restart and then reference the procedure from the "abc.mla" repository that we saved it in: 

 

 

We can use the procedure: 

 

But we can no longer see the implementation: 

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