<PAGE>   1


THIS OPTION AGREEMENT made as of the 21 day of January, 1999.

BETWEEN:
            BIOMETRIC SECURITY CORP. (FORMERLY  SONOMA  RESOURCES  CORPORATION),
            a body corporate, having a head office at #1940 - 400 Burrard 
            Street, Vancouver, British Columbia, V6C 3A6

            (hereinafter called the "Optionor")
                                                               OF THE FIRST PART

AND:
            INLET RESOURCES LTD., a body corporate, having a head office at 
            #304 - 700 West Pender Street, Vancouver, British Columbia, V6C IG8

            (hereinafter called the "Optionee")

                                                              OF THE SECOND PART


WHEREAS

A. The Optionor has represented that it is the sole recorded and beneficial
owner in and to the properties (the "Properties") described in Schedule "A"
hereto subject to the pending and granted provisions described on the said
Schedule;

B. The Optionor now wishes to grant to the Optionee the exclusive fight and
option to acquire up to an undivided 90% fight, title and interest in and to the
Properties, subject to a 10% Carried Working Interest in favour of the Optionor,
on the terms and conditions hereinafter set forth.

NOW THEREFORE THIS AGREEMENT WITNESSES THAT for and in consideration of the
mutual covenants and agreements herein contained and the sum of US $25,000 paid
by the Optionee to the Optionor, the receipt, and sufficiency whereof is hereby
acknowledged by the Optionor, the parties hereto mutually agree as follows:

1.    DEFINITIONS
      -----------
  
1.1   For the purposes of this Agreement:

      (a)     "EXPENDITURES ON THE PROPERTIES" means monies spent pursuant to 
               this Agreement on the exploration, development and related
               operations conducted on or with respect to any part of the
               Properties and shall include but not be limited to:

              (i)    keeping the Properties in good standing;

              (ii)   geophysical, geochemical, geological and related 
                     operations;

              (iii)  drilling, development and mining;

              (iv)   assaying, metallurgical testing;

                                   -1-
<PAGE>   2


              (v)    salaries and wages of personnel directly engaged in a
                     work program on the Properties together with all
                     employee benefits and allowances normally paid during
                     the option period for holiday and vacation pay,
                     Canada Pension Plan, pension benefit plan costs,
                     unemployment insurance, aviation accident insurance,
                     medical insurance, group term life and income
                     protection insurance, employer's liability insurance
                     and workmen's compensation as normally paid;

              (vi)   travelling and directly related expenses including food
                     and lodgings of personnel engaged in work within the 
                     Properties;

              (vii)  insurance premiums to the extent applicable to the
                     exploration, development and related operations 
                     conducted within the Properties;

              (viii) direct supervision and direct management of the
                     exploration, development and related operations 
                     conducted within the Properties;

              (ix)   charges with respect to equipment leased in connection
                     with the exploration, development and related 
                     operations conducted within the Properties; and

              (x)    all charges made with respect to equipment purchased
                     and services rendered in connection with the
                     exploration, development and related operations
                     conducted within the Properties.

      (b)      "Facilities" means all mines and plants, including without
               limitation, all pits, shafts, haulageways, and other underground
               workings, and all buildings, plants, facilities and other
               structures, fixtures and improvements, and all other Properties,
               whether fixed or moveable, as the same may exist at any time in,
               or on the Properties and relating to the operation of the
               Properties as a mine or outside the Properties if for the
               exclusive benefit of the Properties only.

      (c)      "Option" means the option granted by the Optionor to the Optionee
               to acquire an undivided 90% right, title and interest in and to
               the Properties as more particularly set forth in Section 3).


2.    REPRESENTATIONS AND WARRANTIES
      ------------------------------
  
2.1   The Optionee represents and warrants to the Optionor that:

      (a)      it is a company duly incorporated, organized and validly
               subsisting under the laws of its incorporating jurisdiction and
               is qualified to do business in British Columbia;

      (b)      it has full power and authority to carry on its business and to
               enter into this Agreement and any agreement or instrument
               referred to or contemplated by this Agreement;

      (c)      neither the execution and delivery of this Agreement, nor any of
               the agreements referred to herein or contemplated hereby, nor the
               consummation of the transactions hereby contemplated conflict
               with, result in the breach of or accelerate the performance
               required by, any agreement to which it is a party;

      (d)      the execution and delivery of this Agreement and the agreements
               contemplated hereby will not violate or result in the breach of
               the laws of any jurisdiction applicable or pertaining thereto or
               of its constating documents;
 

                                       -2-
<PAGE>   3

      (e)      the Optionee is an "exchange issuer" listed on the VSE, in good
               standing and, to the best of its knowledge, in good standing
               under the B.C. Securities Act and regulations thereto and, will
               remain so throughout the term of this Agreement; and

      (f)      the shares to be issued by the Optionee as provided for in Part
               3.1 of this Agreement will be, when issued, issued as fully paid
               and non-assessable common shares of the Optionee and will have a
               hold period expiring no later than four (4) months from the
               Closing Date and will otherwise be free and clear of all liens,
               charges or encumbrances of any kind whatsoever.

2.2   The Optionor represents and warrants to the Optionee that to the best of 
      the Optionor's knowledge:

      (a)      the Properties are accurately described in Schedule "A", are in
               good standing under the laws of the jurisdiction in which they
               are located and are free and clear of all liens, charges and
               encumbrances;

      (b)      the Optionor is the sole recorded and beneficial owner of the
               Properties subject to the pending and granted provisions and has
               the exclusive right to enter into this Agreement and all
               necessary authority to dispose of an interest in the Properties
               in accordance with the terms of this Agreement;

      (c)      no person, firm or corporation has any proprietary or possessory
               interest in the Properties other than the Optionor and no person,
               firm or corporation is entitled to any royalty or other payment
               in the nature of rent or royalty on any minerals, ores, metals or
               concentrates or any other such products removed from the
               Properties.


2.3   The representations and warranties hereinbefore set out are conditions on
      which the parties have relied in entering into this Agreement and shall
      survive the acquisition of any interest in the Properties by the Optionee
      and each of the parties will indemnify and save the other harmless from 
      all loss, damage, costs, actions and suits arising out of or in connection
      with any breach of any representation, warranty, covenant, agreement or
      condition made by them and contained in this Agreement.


3.    OPTION
      ------

3.1   The Optionor hereby gives and grants to the Optionee the sole and 
      exclusive irrevocable right and option to acquire up to an undivided 90% 
      right, title and interest in and to the Property in accordance with the 
      following terms:

      (a)      By the Optionee paying the sum of US $125,000 and issuing to the
               Optionor as fully paid and non-assessable, 100,000 common shares
               of Inlet Resources Ltd. within 5 business days of the date of
               regulatory acceptance ("Closing Date") of this Agreement and the
               Optionee incurring Expenditures on the Property of at least US
               $650,000 no later than 12 months from the Closing Date, the
               Optionee will acquire an undivided 50% right, title and interest
               in the Properties (the "First Option");and

      (b)      By the Optionee paying the additional sum of US $250,000 and
               issuing to the Optionor as fully paid and non-assessable a
               further 100,000 common shares of Inlet Resources Ltd. and the
               Optionee incurring cumulative Expenditures on the Property of at
               least US $1,400,000 and the prior filing of an engineering report
               indicating the work carried out and recommending an additional
               exploration program acceptable to the regulatory authorities no
               later than 24 months from the Closing Date, the Optionee will
               acquire a cumulative undivided 70% right (being an additional
               20%), title and interest in the Properties (the "Second Option");
               and
   
                                       -3-
<PAGE>   4


      (c)      By the Optionee paying the additional sum of US $350,000 and
               issuing to the Optionor as fully paid and non-assessable a
               further 100,000 common shares of Inlet Resources Ltd. and the
               Optionee incurring cumulative Expenditures on the Property of at
               least US $2,150,000 and the prior filing of an engineering report
               indicating the work carried out and recommending an additional
               exploration program acceptable to the regulatory authorities no
               later than 36 months from the Closing Date, the Optionee will
               acquire a cumulative undivided 90% right (being an additional
               20%), title and interest in the Properties (the "Third Option");
               and

      (d)      Upon the exercise of the Third Option, the Optionor will have a
               10% Carried Working Interest in the Properties and the Optionee
               will hold an undivided 90% right, title and interest in the
               Properties. The Optionee may acquire the 10% Carried Working
               Interest from the Optionee for the sum of US $2,000,000 payable
               on or before November 25, 2004.


4.    RIGHT OF ENTRY
      --------------

4.1   During the currency of the Option, the Optionee, its employees, agents and
      independent contractors shall have the sole and exclusive right and option
      to:

      (a)      enter upon the Properties,

      (b)      have exclusive and quiet possession thereof,

      (c)      do such prospecting, exploration, development or other mining
               work thereon and thereunder as the Optionee in its sole
               discretion may deem advisable;

      (d)      bring and erect upon the Properties such Facilities as the
               Optionee may deem advisable; and


5.    TERMINATION
      -----------

      (a)      This Agreement and the Option will terminate 5 business days
               after Closing Date unless on or before that date the Optionee has
               paid to the Optionor the sum of US $125,000 and issued to the
               Optionor as fully paid and non-assessable 100,000 shares of Inlet
               Resources Ltd.; and

      (b)      The Agreement and the Option will terminate on the day that is 12
               months after the Closing Date unless, on or before that day the
               Optionee has incurred, Expenditures on the Property of at least
               US $650,000; and

      (c)      The Second Option and Third Option will terminate on the day that
               is 24 months after the Closing Date unless, on or before that day
               the Optionee has incurred, cumulative Expenditures on the
               Property of at least US $1,400,000 and issued to the Optionor as
               fully paid and non-assessable a further 100,000 shares of Inlet
               Resources Ltd.; and

      (d)      The Third Option will terminate on the day that is 36 months
               after the Closing Date unless, on or before that day the Optionee
               has incurred, cumulative Expenditures on the Property of at least
               US $2,150,000 and issued to the Optionor as fully paid and
               non-assessable a further 100,000 shares of Inlet Resources Ltd.

5.2   The parties hereto may extend in writing any of the deadlines set out in 
      subsection 5.1


                                       -4-
<PAGE>   5

6.    COVENANTS OF THE OPTIONOR
      -------------------------

6.1   During the currency of this Agreement and the Option, the Optionor 
      covenants and agrees with the Optionee to:

      (a)      not do any act or thing which would prevent the Optionee from
               exercising its rights in accordance with the terms and conditions
               of this Agreement provided the Optionee has and continues to meet
               all of its obligations hereunder;

      (b)      make available to the Optionee and its representatives all
               records and files relating to the Properties and permit the
               Optionee and its representatives at its own expense to take
               abstracts therefrom and make copies thereof, and

      (c)      promptly provide the Optionee with any and all notices and
               correspondence from Government agencies in respect of the
               Properties.


7.    COVENANTS OF THE OPTIONEE
      -------------------------

7.1   During the currency of the Option, the Optionee covenants and agrees with
      the Optionor to:

      (a)      keep the Properties in good standing, and free and clear of all
               liens, charges and encumbrances arising from its operations
               hereunder and in good standing by the doing and filing of all
               necessary work and by the doing of all other acts and things and
               making all other payments which may be necessary in that regard;

      (b)      permit the Optionor, or its representatives duly authorized by it
               in writing, at their own risk and expense, access to the
               Properties at all reasonable times and to all records prepared by
               the Optionee in connection with work done on or with respect to
               the Properties and furnish the Optionor with annual reports with
               respect to the work carried out by the Optionee on or with
               respect to the Properties and results obtained, together with
               timely current reports and information on any material results
               obtained;

      (c)      conduct all work on or with respect to the Properties in a
               careful and minerlike manner and in compliance with all
               applicable laws, rules, orders and regulations, and indemnify and
               save the Optionor harmless from any and all claims, suits or
               actions made or brought against it as a result of work done by
               the Optionee on or with respect to the Properties;

      (d)      obtain and maintain, or cause any contractor engaged hereunder to
               obtain and maintain, during any period in which active work is
               carried out hereunder adequate insurance.


8.    OBLIGATIONS OF THE OPTIONEE AFTER TERMINATION
      ---------------------------------------------

8.1   In the event of the termination of the Option, the Optionee will:

      (a)      leave the Properties in good standing for a period of at least 90
               days, free and clear of all liens, charges and encumbrances 
               arising from its operations hereunder and in a safe and orderly
               condition;

      (b)      deliver to the Optionor within sixty (60) days of his written
               request a comprehensive report on all work carried out by the
               Optionee on the Properties (limited to factual matters only)
               together with copies of all maps, drill logs, assay


                                       -5-
<PAGE>   6

               results and other factual technical data compiled by the Optionee
               with respect to the Properties;

      (c)      have the right and obligation to remove from the Properties
               within six (6) months from the effective date of termination all
               Facilities erected, installed or brought upon the Properties by
               or at the instance of the Optionee; and

      (d)      notify the Escrow Holder pursuant to subparagraph 9.3(b)(i).


9.    TRANSFER OF TITLE AND ESCROW HOLDER
      -----------------------------------

9.1   Upon the written request of the Optionee, the Optionor will deliver or
      cause to be delivered to the Optionee a duly executed transfer of the
      Properties in favour of the Optionee or a wholly-owned subsidiary (the
      "Optionee Transfer"). The Optionee shall be entitled to record the 
      Optionee Transfer with the appropriate government offices to effect 
      registration of title of the Properties into its own name or that of its 
      subsidiary, provided the Optionee shall hold the Properties subject to the
      terms of this Agreement, it being understood that registration of title to
      the Properties prior to the exercise of the Option is for administrative
      convenience only and that beneficial ownership of the Properties shall 
      pass to the Optionee only upon the Optionee having exercised the Option.

9.2   Forthwith after the delivery to Mr. David A. Schwartz (the "Escrow 
      Holder") of the Optionee Transfer pursuant to subsection 9.1, the Optionee
      or its subsidiary will execute and deliver to the Escrow Holder a duly
      executed transfer in favour of the Optionor providing for the registration
      of title to the Properties into the name of the Optionor (the "Optionor
      Transfer").

9.3   The Escrow Holder will hold the Optionor Transfer subject to the 
      following:

      (a)      in the event the Optionee exercises the Option, the Escrow Holder
               will deliver the Optionor Transfer to the Optionee and for the
               purposes of this paragraph 9.3(a) will accept as conclusive
               evidence of the exercise of the Option by the Optionee:

               (i)      a notice to that effect from the Optionor, or

               (ii)     a Statutory Declaration to that effect made by the
                        Optionee provided the Escrow Holder has delivered a copy
                        of the Statutory Declaration to the Optionor and the 
                        Optionor has been in receipt of same for ten days and 
                        the Optionor has not objected in writing to the Escrow 
                        Holder.

      (b)      in the event of termination of the Option, the Escrow Holder
               shall deliver the Optionor Transfer to the Optionor and for the
               purposes of this paragraph 9.3(b), the Escrow Holder will accept
               as conclusive evidence of the termination of the Option:

               (i)      a notice to that effect from the Optionee; or

               (ii)     a Statutory Declaration to that effect made by the
                        Optionor specifying full particulars of the Optionee's
                        default, provided the Escrow Holder has delivered a
                        copy of the Statutory Declaration to the Optionee and
                        the Optionee has been in receipt of same for ten (10)
                        days and the Optionee has not objected in writing to the
                        Escrow Holder.

9.4   The duties of the Escrow Holder will be limited to the holding of the
      Optionor Transfer and the delivery thereof in accordance with the terms of
      this section and in the event of any dispute between the Optionee and the
      Optionor, the Escrow Holder will hold the Optionor Transfer until the said
      dispute has been settled by agreement between them or by adjudication.

                                       -6-
<PAGE>   7

9.5   The Optionor and the Optionee will indemnify and save harmless the Escrow
      Holder of and from all claims, demands, suits, actions, liabilities, 
      costs, expenses and damages suffered, incurred or brought, by or against
      the Escrow Holder, arising out of acting as Escrow Holder hereunder, save
      and except any claim against the Optionor for the payment of the 
      reasonable fees and expenses of the Escrow Holder, and will execute such
      escrow instructions as are not inconsistent with the terms of this section
      and as are required by the Escrow Holder setting its duties and
      responsibilities hereunder. The Optionee will pay to the Escrow Holder its
      reasonable fees and expenses for so acting.


10.   FURTHER ASSURANCES
      ------------------

10.1  The parties hereto agree that they and each of them will execute all
      documents and do all acts and things within their respective powers to 
      carry out and implement the provisions or intent of this Agreement.


11.   NOTICE
      ------

11.1  Any notice, direction or other instrument required or permitted to be
      given under this Agreement shall be in writing and may be given by the
      delivery of the same or by mailing the same by prepaid registered or
      certified mail or by sending the same by telegram, telex, 
      telecommunication or other similar form of communication, in each case
      addressed as follows:

(a)   if to the Optionor at:

      BIOMETRIC SECURITY CORP.
      (FORMERLY SONOMA RESOURCES CORPORATION)
      #1940 - 400 Burrard Street
      Vancouver, British Columbia
      V6C 3A6


(b)    if to the Optionee at:

      INLET RESOURCES LTD.
      #304 - 700 West Pender Street
      Vancouver, British Columbia
      V6C 1G8


11.2  Any notice, direction or other instrument aforesaid will, if delivered, be
      deemed to have been given and received on the day it was delivered, and if
      mailed, be deemed to have been given and received on the third business 
      day following the day of mailing, except in the event of disruption of the
      postal service in which event notice will be deemed to be received only
      when actually received and, if sent by telegram, telex, telecommunication
      or other similar form of communication, be deemed to have been given or
      received on the day it was so sent.

11.3  Any party may at any time give to the other notice in writing of any 
      change of address of the party giving such notice and from and after the
      giving of such notice, the address or addresses therein specified will be
      deemed to be the address of such party for the purposes of giving notice
      hereunder.


12.   ABANDONMENT
      -----------

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<PAGE>   8

12.1  The Optionee shall have the unfettered right at any time and for any 
      reason after the exercise of the Option to abandon the Properties or part
      of them provided that if the Properties are so abandoned, the Optionee
      shall, if requested by the Optionor, transfer the abandoned Properties to
      the Optionor and have no other obligations or liabilities to the Optionor
      under this Agreement whatsoever.


13.   ADDITIONAL TERMINATION
      ----------------------
 
13.1  In addition to any other termination provision contained in this 
      Agreement, the Optionee shall have the right to terminate this Agreement 
      by giving thirty (30) days' notice of such termination to the Optionor, 
      and in the event of such termination, this Agreement, save and except for
      the provisions of section 8 and 9 hereto, shall be of no further force and
      effect.


14.   HEADINGS
      --------

14.1  The headings to the respective sections herein shall not be deemed part of
      this Agreement but shall be regarded as having been used for convenience 
      only.


15.   DEFAULT
      -------
     
15.1  Notwithstanding anything in this Agreement to the contrary if any party (a
      "Defaulting Party") is in default of any requirement herein set forth the
      party affected by such default shall give written notice to the Defaulting
      Party specifying the default and the Defaulting Party shall not lose any
      rights under this Agreement, unless within thirty (30) days after the
      giving of notice of default by the affected party the Defaulting Party 
      has failed to take reasonable steps to cure the default by the appropriate
      performance and if the Defaulting Party fails within such period to take
      reasonable steps to cure any such default, the affected party shall be
      entitled to seek any remedy it may have on account of such default,
      including termination of this Agreement.


16.   OPTION ONLY
      -----------

16.1  This is an option only and except as specifically provided otherwise,
      nothing herein contained shall be construed as obligating the Optionee to
      do any acts or make any payments hereunder, and any act or acts or payment
      or payments as shall be made hereunder shall not be construed as 
      obligating the Optionee to do any further act or make any further payment 
      or payments.


17.   ENUREMENT
      ---------

17.1  This Agreement shall enure to the benefit of and be binding upon the 
      parties hereto and their respective heirs, executors, administrators, 
      successors and assigns.


19.   FORCE MAJEURE
      -------------

19.1  No party will be liable for its failure to perform any of its obligations 
      under this Agreement due to a cause beyond its control (except those 
      caused by its own lack of funds) including, but not limited to acts of 
      God, fire, flood, explosion, strikes, lockouts or other industrial
      disturbances, laws, rules and regulations or orders of any duly 
      constituted governmental authority or non availability of materials or
      transportation (each an "Intervening Event").

                                       -8-
<PAGE>   9

19.2  All time limits imposed by this Agreement will be extended by a period 
      equivalent to the period of delay resulting from an Intervening Event 
      described in subsection 19.1.

19.3  A party relying on the provisions of subsection 19.1 will take all
      reasonable steps to eliminate an Intervening Event and, if possible, will
      perform its obligations under this Agreement as far as practical, but
      nothing herein will require such party to settle or adjust any labour
      dispute or to question nor to test the validity of any law, rule,
      regulation or order of any duly constituted governmental authority or to
      complete its obligations under this Agreement if an Intervening Event
      renders completion impossible.


20.   ENTIRE AGREEMENT
      ----------------

20.1  This Agreement constitutes the entire agreement between the parties and
      replaces and supersedes all prior agreements, memoranda, correspondence,
      communications, negotiations and representations, whether verbal or 
      written, expressed or implied, statutory or otherwise between the parties
      with respect to the subject matter herein.


21.   TIME OF THE ESSENCE
      -------------------

21.1. Time shall be of the essence of this Agreement.


22.   CONDITIONS PRECEDENT
      --------------------

22.1  This Agreement is subject, no later than February 28, 1999 to:

      (a)      its acceptance for filing by the Vancouver Stock Exchange on
               behalf of the Optionee and the Optionor, which each party
               covenants to use its best efforts to obtain forthwith;

      (b)      approval of the boards of directors of the Optionee; and

      (c)      satisfactory due diligence on the Properties and the Optionor by
               the Optionee.


IN WITNESS WHEREOF the parties hereto have executed this Agreement as of the day
and year first above written.

The CORPORATE SEAL of                               )
BIOMETRIC SECURITY                                  )
CORP., the Optionor, was                            )
hereunto affixed in the presence of:                )
                                                    )
                                                    )
                                                    )
/s/ Patrick W. McCleery                             )
--------------------------                          ) c/s
Authorized Signatory                                )
                                                    )
                                                    )
                                                    )
/s/ Wayne Johnstone                                 )
--------------------------                          )
Authorized Signatory                                )


                                       -9-
<PAGE>   10


The CORPORATE SEAL of                               )
INLET RESOURCES LTD.,                               )
the Optionee, was hereunto                          )
affixed in the presence of:                         )
                                                    )
                                                    )
/s/ William Daly                                    )
-------------------------                           ) c/s
Authorized Signatory                                )
                                                    )
                                                    )
                                                    )
________________________                            )
Authorized Signatory                                )


                                      -10-