**Exhibit31.2**

 

**CERTIFICATIONS**

 

I, Diane J. Ryan, Chief Financial Officer of ImplantSciences Corporation, certify that:

(1) I have reviewed this quarterly report on Form10-QSB of Implant Sciences Corporation; 

(2) Based on my knowledge, this report does notcontain any untrue statement of a material fact or omit to state a materialfact necessary to make the statements made, in light of the circumstances underwhich such statements were made, not misleading with respect to the periodcovered by this report; 

(3) Based on my knowledge, the financial statements,and other financial information included in this report, fairly present in allmaterial respects the financial condition, results of operations and cash flowsof the small business issuer as of, and for, the periods presented in thisreport; 

(4) The small business issuer's other certifyingofficer(s) and I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) and internal control over financial reporting (as defined inExchange Act Rules 13a-15(f) and 15d-15(f)) for the small business issuer andhave: 

(a) Designed suchdisclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that materialinformation relating to the small business issuer, including its consolidatedsubsidiaries, is made known to us by others within those entities, particularlyduring the period in which this report is being prepared; 

(b) Designed suchinternal control over financial reporting, or caused such internal control overfinancial reporting to be designed under our supervision, to provide reasonableassurance regarding the reliability of financial reporting and the preparationof financial statements for external purposes in accordance with generallyaccepted accounting principles; 

(c) Evaluated theeffectiveness of the small business issuer's disclosure controls and proceduresand presented in this report our conclusions about the effectiveness of thedisclosure controls and procedures, as of the end of the period covered by thisreport based on such evaluation; and 

(d) Disclosed in thisreport any change in the small business issuer's internal control over financialreporting that occurred during the small business issuer's most recent fiscalquarter (the small business issuer's fourth fiscal quarter in the case of anannual report) that has materially affected, or is reasonably likely tomaterially affect, the small business issuer's internal control over financialreporting; and 

(5) The small business issuer's other certifyingofficer(s) and I have disclosed, based on our most recent evaluation ofinternal control over financial reporting, to the small business issuer'sauditors and the audit committee of the small business issuer's board ofdirectors (or persons performing the equivalent functions): 

(a) All significantdeficiencies and material weaknesses in the design or operation of internalcontrol over financial reporting which are reasonably likely to adverselyaffect the small business issuer's ability to record, process, summarize andreport financial information; and 

(b) Any fraud, whether ornot material, that involves management or other employees who have asignificant role in the small business issuer's internal control over financialreporting. 

 
|   | Date: February 22,  2005 |
|--------|-------------------------------|
|   |                          |
|   | /s/ Diane J. Ryan             |   |
|   | Diane J. Ryan                 |
|   | Chief Financial  Officer      |

 

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