What rights restrictions are associated with the probity.org schemes?
Hopefully, none: unless you decide to use a commercial scheme which probity.org refers to. Since the US National Institute of Standards and Technology (NIST) has promoted the idea of publically-available cryptosystems such as DES, there continues to be a general worldwide acceptance of the principle that cryptographic algorithms should be public (though, in the US, under the watchful eye of the US National Security Agency). Of course, they keys to such cryptosystems are not public, which is why they work! There has been parallel development of supporting algorithms called hashing algorithms (or one-way functions or message authentication codes, MACs). There are currently over 20 of these in the public domain devised by the best cryptographers in the world. probity.org does not recommend any particular algorithm but it seeks to inform users about the properties of the algorithms so an informed choice can be made.
