**EXHIBIT 31.1**

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**Rule 13a-14(a)/15d-14(a) CERTIFICATION**

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I, Patrick F. O’Neal, certifythat:

 

                1.             Ihave reviewed this quarterly report on Form 10-QSB for the quarterly periodending September 30, 2004 of Sento Corporation;

 

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

 

                3.             Based on my knowledge, thefinancial statements, and other financial information included in this report,fairly present in all material respects the financial condition, results ofoperations and cash flows of the small business issuer as of, and for, theperiods presented in this report;

 

                4.             The small business issuer’s othercertifying officer(s) and I are responsible for establishing and maintainingdisclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)and 15d-15(e)) for the small business issuer and have:

 

                (a)           designedsuch disclosure 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)           evaluatedthe effectiveness of the small business issuer’s disclosure controls andprocedures and presented in this report our conclusions about the effectivenessof the disclosure controls and procedures, as of the end of the period coveredby this report based on such evaluation; and

 

                (c)           disclosedin this report any change in the small business issuer’s internal control overfinancial reporting that occurred during the small business issuer’s mostrecent fiscal quarter (the small business issuer’s fourth fiscal quarter in thecase of an annual report) that has materially affected, or is reasonably likelyto materially affect, the small business issuer’s internal control overfinancial reporting; and

 

                5.             The small business issuer’s othercertifying officer(s) and I have disclosed, based on our most recent evaluationof internal 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)           allsignificant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely toadversely affect the small business issuer’s ability to record, process,summarize and report financial information; and

 

                (b)           anyfraud, whether or not material, that involves management or other employees whohave a significant role in the small business issuer’s internal control overfinancial reporting.

 
| Date:  November 12, 2004 |                                   |
|--------------------------|----------------------------------------|
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|                     |                                   |
|                     | /s/ PATRICK  F. O’ NEAL           |
|                     | Patrick F.  O’Neal                |
|                     | President  and Chief Executive Officer |

 

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