AMENDMENT TO
                       STOCK AND OPTION PURCHASE AGREEMENT

        This  Amendment  to  the  Stock  and  Option  Purchase  Agreement  (this
"Amendment")  is  entered  as of May 19,  2000  by and  between  Hidenet  Secure
Architectures,  Inc., a New Jersey corporation  ("Parent"),  NetworkPrivacy.com,
Inc., a company  organized  under the laws of Delaware (the  "Company"),  and NP
Partners,  LLC, a limited liability company organized under the laws of New York
(the "Investor").

                                    RECITALS

        WHEREAS, the parties hereto are parties to that certain Stock and Option
Purchase Agreement dated as of April 13, 2000 (the "Agreement");

        WHEREAS,  the  parties  desire to amend the  Agreement  on the terms and
conditions contained herein.

        NOW,  THEREFORE,  in  consideration of the mutual promises and covenants
hereinafter set forth, the parties hereto agree as follows:

1.             Capitalized  Terms.  Capitalized  terms used herein not otherwise
               defined  shall have the  meanings  ascribed  to such terms in the
               Agreement.

2.             Extension of Time to Purchase  Preferred Shares.  Notwithstanding
               anything  contained  in Section  1.1(ii) of the  Agreement to the
               contrary,  Parent and the Company  hereby agree that the Investor
               shall  have the  right to  subscribe  for an  additional  128,000
               Preferred  Shares at any time after the date hereof until ______,
               2000.

3.             Increase in Option  Shares.  Pursuant to Section  1.3(iii) of the
               Agreement,  Parent  hereby  confirms,  and  the  Investor  hereby
               acknowledges, that the number of shares exercisable by the Option
               shall be increased by 174,669 shares of Parent as a result of the
               purchase  by the  Investor  of an  additional  32,000  shares  of
               Preferred Shares as of the date hereof.

4.             Amendment.   Other  than  as  specifically   set  forth  in  this
               Amendment, all terms and conditions of the Agreement shall remain
               in full force and effect.  All references to the Agreement  after
               the date hereof  shall  automatically  be deemed to include  this
               Amendment,  and, accordingly,  without limiting the generality of
               this sentence,  it is understood and agreed that the defined term
               "Agreement" includes the Agreement and this Amendment.

5.             Governing Law. This Agreement  shall be interpreted in accordance
               with,  and  governed in all respects by, the laws of the State of
               Delaware,  without giving effect to the rules of conflict of laws
               thereof,  and  the  competent  courts  of  New  York  shall  have
               exclusive jurisdiction over all disputes between the parties with
               respect  to  this   Agreement  and  no  other  court  shall  have
               jurisdiction over this Agreement.




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                              Signatures to Follow]





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        IN WITNESS  WHEREOF,  this  Amendment  has been  executed as of the date
first above written by the parties hereto.



NETWORKPRIVACY.COM, INC.

/s/ Robert Friedman
---------------------
By: Robert Friedman
Title:Chief Executive Officer


HIDENET SECURE ARCHITECTURES, INC.

/s/ Ron Fussman
---------------------
By: Ron Fussman
Title: President


NP PARTNERS, LLC

/s/ Mark S. Hauser
---------------------
By: Mark S. Hauser
Title:Manager