On Fri, Oct 12, 2018 at 3:57 AM Costello, Roger L. via Unicode < unicode@unicode.org> wrote:
> Hi Unicode Experts, > > Suppose base64 encoding is applied to m to yield base64 text t. > > Next, suppose base64 encoding is applied to m' to yield base64 text t'. > > If m is not equal to m', then t will not equal t'. > > In other words, given different inputs, base64 encoding always yields > different base64 texts. > > True or false? > true. base64 to and from is always the same thing. > > How about the opposite direction: If m is base64 encoded to yield t and > then t is base64 decoded to yield n, will it always be the case that m > equals n? > False. Canonical translation may occur which the different base64 may be the same sort of string... https://en.wikipedia.org/wiki/Unicode_equivalence https://en.wikipedia.org/wiki/Canonical_form > /Roger > >
