<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THE ENCLOSED FINANCIAL DATA SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE FINANCIAL STATEMENTS OF WAVE SYSTEMS CORP. FOR THE NINE
MONTHS ENDED SEPTEMBER 30, 2000 AND IS QUALIFIED IN IT ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000919013
<NAME> WAVE SYSTEMS CORP.
<CURRENCY> US DOLLARS

<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               SEP-30-2000
<EXCHANGE-RATE>                                      1
<CASH>                                      93,981,883
<SECURITIES>                                 3,799,370
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                    494,043
<CURRENT-ASSETS>                            99,890,724
<PP&E>                                       8,689,843
<DEPRECIATION>                             (3,429,106)
<TOTAL-ASSETS>                             113,133,098
<CURRENT-LIABILITIES>                        7,772,734
<BONDS>                                              0
                                0
                                          0
<COMMON>                                       468,675
<OTHER-SE>                                 105,360,364
<TOTAL-LIABILITY-AND-EQUITY>               113,133,098
<SALES>                                        159,142
<TOTAL-REVENUES>                                     0
<CGS>                                           55,316
<TOTAL-COSTS>                               35,637,416
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                             2,320,000
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                           (33,631,821)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                              (33,631,821)
<EPS-BASIC>                                      (.74)
<EPS-DILUTED>                                        0


</TABLE>



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