**EXHIBIT 31.2****CERTIFICATION**I, G. Grant Lyon, certify that:1. I have reviewed this quarterly report on Form 10-Q of Hypercom Corporation; 2. Based on my knowledge, this quarterly report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statements made, in lightof the circumstances under which such statements were made, not misleading with respect to theperiod covered by this quarterly report; 3. Based on my knowledge, the financial statements, and other financial information included inthis quarterly report, fairly present in all material respects the financial condition,results of operations and cash flows of the registrant as of, and for, the periods presentedin this quarterly report; 4. The registrant’s other certifying officer and I are responsible for establishing andmaintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) and internal control over financial reporting (as defined in Exchange Act rules13a-15(f) and 15d-15(f)) for the registrant and we have:a) Designed such disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that material information relatingto the registrant, including its consolidated subsidiaries, is made known to us by otherswithin those entities, particularly during the period in which this quarterly report is beingprepared;b) Designed such internal control over financial reporting, or caused such internal controlover financial reporting to be designed under our supervision, to provide reasonableassurance regarding the reliability of financial reporting and the preparation of financialstatements for external purposes in accordance with generally accepted accounting principles;c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures andpresented in this report our conclusions about the effectiveness of the disclosure controlsand procedures, as of the end of the period covered by this report based on such evaluation;andd) Disclosed in this report any change in the registrant’s internal control over financialreporting that occurred during the registrant’s most recent fiscal quarter that hasmaterially affected, or is reasonably likely to materially affect, the registrant’s internalcontrol over financial reporting; and5. The registrant’s other certifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to the registrant’s auditors and theaudit committee of registrant’s board of directors (or persons performing the equivalentfunction):a) All significant deficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likely to adversely affect theregistrant’s ability to record, process, summarize and report financial information; andb) Any fraud, whether or not material, that involves management or other employees who have asignificant role in the registrant’s internal control over financial reporting.     Date: November 9, 2005 By: /s/ G. Grant Lyon    G. Grant Lyon    Interim Chief Financial Officer  
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