%ENCRYPT{}% variable is handled by the EncryptPlugin
%ENCRYPT{"any text"}% or %ENCRYPT{"any text" allow="AnyGroup"}%
allow="...": TWiki group or list of users allowed to view/edit encrypted text (comma space delimited list of WikiWords)
%SHAREME{"top secret stuff" allow="TWikiAdminGroup"}% encrypts text, only the TWikiAdminGroup can view/change the text