12-04-2019, 05:46 PM
Yes actually we have wondered a bit off-topic (my fault), but I can't agree that the result does not depend on whether the input is abbreviated or not. It could depend on that. That, in turn, depends on the exact enciphering technique. That is best explained by the example of a simple substitution cipher, where the result is a 1-to-1 mapping. Of course, if two plain texts (abbreviated and non-abbreviated) differ in properties, then ciphertexts will differ accordingly.