EXHIBIT 31


                                 CERTIFICATIONS


I, David Blitz,  President  and Chief  Executive  Officer of Cadus  Corporation,
certify that:

1.     I have reviewed this quarterly report on Form 10-Q of Cadus Corporation;

2.     Based on my knowledge,  this report does not contain any untrue statement
       of a material fact or omit to state a material fact necessary to make the
       statements  made,  in  light  of  the  circumstances   under  which  such
       statements  were made, not misleading  with respect to the period covered
       by this report;

3.     Based on my knowledge,  the  financial  statements,  and other  financial
       information  included  in this  report,  fairly  present in all  material
       respects the financial condition, results of operations and cash flows of
       the registrant as of, and for, the periods presented in this report;

4.     The registrant's  other  certifying  officer(s) and I are responsible for
       establishing  and  maintaining  disclosure  controls and  procedures  (as
       defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant
       and we have:

       a)     Designed such disclosure  controls and procedures,  or caused such
              disclosure  controls  and  procedures  to be  designed  under  our
              supervision,  to ensure that material  information relating to the
              registrant, including its consolidated subsidiaries, is made known
              to us by others  within those  entities,  particularly  during the
              period in which this report is being prepared;

       b)     Evaluated  the   effectiveness  of  the  registrant's   disclosure
              controls  and   procedures   and  presented  in  this  report  our
              conclusions about the effectiveness of the disclosure controls and
              procedures,  as of the end of the period  covered  by this  report
              based on such evaluation; and

       c)     Disclosed in this report any change in the  registrant's  internal
              control  over  financial   reporting  that  occurred   during  the
              registrant's most recent fiscal quarter (the  registrant's  fourth
              fiscal  quarter  in  the  case  of  an  annual  report)  that  has
              materially affected, or is reasonably likely to materially affect,
              the registrant's internal control over financial reporting; and

5.     The registrant's other certifying officer(s) and I have disclosed,  based
       on  our  most  recent  evaluation  of  internal  control  over  financial
       reporting,  to the  registrant's  auditors and the audit committee of the
       registrant's  board of directors (or persons  performing  the  equivalent
       function):

       a)     All significant deficiencies and material weaknesses in the design
              or operation of internal  control over financial  reporting  which
              are reasonable likely to adversely affect the registrant's ability
              to  record,   process,   summarize  and  report   financial   data
              information; and

       b)     Any fraud,  whether or not material,  that involves  management or
              other  employees who have a significant  role in the  registrant's
              internal control over financial reporting.

Date:  November 10, 2004


                                         /s/ David Blitz
                                         ---------------------------------------
                                         David Blitz
                                         President and Chief Executive Officer
                                         (Principal Executive Officer and
                                         Principal Financial Officer)