The Collaborative International Dictionary of English v.0.48:

Obfuscate \Ob*fus"cate\, v. t. [imp. & p. p. Obfuscated; p.
   pr. & vb. n. Obfuscating.]
   1. To darken; to obscure; to becloud.
      [1913 Webster]

   2. Hence: To confuse; to bewilder; to make unclear.
      [1913 Webster]

            His head, like a smokejack, the funnel unswept, and
            the ideas whirling round and round about in it, all
            obfuscated and darkened over with fuliginous matter.
                                                  --Sterne.
      [1913 Webster]

            Clouds of passion which might obfuscate the
            intellects of meaner females.         --Sir. W.
                                                  Scott.
      [1913 Webster]

The Free On-line Dictionary of Computing (30 December 2018):

obfuscated

    Made unclear, used to describe source code
   that has been transformed or written to make it as hard as
   possible to read, usually for fun, as in the Obfuscated C
   Contest.  A japh is a kind of obfuscated Perl program.

   The term is not normally used for code that has been
   transformed for security purposes, e.g. to enforce some kind
   of licencing mechanism.

   (2009-05-14)