I care a lot about what iCEBREAKER thinks, but I like to be dishonest and make of show of pretending I do not.

Comparing a sample piece of code it is clear that at least some of it is based on Bitcoin code:

From vanillacoin - https://github.com/john-connor/vanillacoin/blob/master/src/address_manager.cpp#L1315


The above code from vanillacoin is based on bitcoin, albeit renamed, refactored, reformatted and re-commented at almost every possible occasion.

The algorithm is the same line by line and even the esoteric identifier name "IsTerrible"/"is_terrible" is used in both.

My guess is John started with a old bitcoin code base and refactored, renamed and recommented the code to a huge degree.