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  <xsd:element id="bkyi_EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossAndResearchCreditCarryforwardsAmount" name="EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossAndResearchCreditCarryforwardsAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossAndResearchCreditCarryforwardsPercent" name="EffectiveIncomeTaxRateReconciliationExpirationOfNetOperatingLossAndResearchCreditCarryforwardsPercent" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_EffectiveIncomeTaxRateReconciliationTrueUpsAndOtherAdjustmentsAmount" name="EffectiveIncomeTaxRateReconciliationTrueUpsAndOtherAdjustmentsAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_EffectiveIncomeTaxRateReconciliationTrueUpsAndOtherAdjustmentsPercent" name="EffectiveIncomeTaxRateReconciliationTrueUpsAndOtherAdjustmentsPercent" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_EffectiveIncomeTaxReconciliationPermanentDifferences" name="EffectiveIncomeTaxReconciliationPermanentDifferences" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_ExercisePriceGreaterThanAverageMarketPriceOfCommonSharesMember" name="ExercisePriceGreaterThanAverageMarketPriceOfCommonSharesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_ExistingWarrantsMember" name="ExistingWarrantsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_FeeOnProceedsFromWarrantsPercent" name="FeeOnProceedsFromWarrantsPercent" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="bkyi_GovernmentLoanMember" name="GovernmentLoanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_HardwareMember" name="HardwareMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_HardwareReserveMember" name="HardwareReserveMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_InTheMoneyOptionsMember" name="InTheMoneyOptionsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_IncreaseDecreaseInAccruedEmployeeReimbursement" name="IncreaseDecreaseInAccruedEmployeeReimbursement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_IncreaseDecreaseInCapitalizedContractCosts" name="IncreaseDecreaseInCapitalizedContractCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_IncreaseDecreaseInProfessionalFees" name="IncreaseDecreaseInProfessionalFees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_IncreaseDecreaseInRightOfUseAssets" name="IncreaseDecreaseInRightOfUseAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_IncreaseDecreaseInSalesTaxPayable" name="IncreaseDecreaseInSalesTaxPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_IncreaseDecreaseInVacationTimeAccrualExpense" name="IncreaseDecreaseInVacationTimeAccrualExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_InvestmentOwnedPercentageOfSharesOutstanding" name="InvestmentOwnedPercentageOfSharesOutstanding" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="bkyi_LesseeOperatingLeaseCostsAssetsAndLiabilitiesTableTextBlock" name="LesseeOperatingLeaseCostsAssetsAndLiabilitiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_MeasurementInputImpairmentOfInvestmentsMember" name="MeasurementInputImpairmentOfInvestmentsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_MonthlyExpensesAmount" name="MonthlyExpensesAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_NigeriaRevenueServiceMember" name="NigeriaRevenueServiceMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_NonPlanMember" name="NonPlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_OneCustomerMember" name="OneCustomerMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_OperatingExpensesBeforeImpairmentOfInvestment" name="OperatingExpensesBeforeImpairmentOfInvestment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_OperatingLossCarryforwardsNotSubjectToExpiration" name="OperatingLossCarryforwardsNotSubjectToExpiration" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="bkyi_OutstandingWarrantsMember" name="OutstandingWarrantsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_PolicyTable" name="PolicyTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_PortugueseTaxAndCustomsAuthorityMember" name="PortugueseTaxAndCustomsAuthorityMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_ProceedsFromEmployeeStockPurchasePlan" name="ProceedsFromEmployeeStockPurchasePlan" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_PromissoryNote1Member" name="PromissoryNote1Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_PromissoryNote2Member" name="PromissoryNote2Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_ProprietarySoftwareMember" name="ProprietarySoftwareMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_ProvisionForDoubtfulAccountsIncludingWriteoff" name="ProvisionForDoubtfulAccountsIncludingWriteoff" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_ReferralFeeWarrantsMember" name="ReferralFeeWarrantsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_ResearchDevelopmentAndEngineeringMember" name="ResearchDevelopmentAndEngineeringMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_ReverseStockSplitMember" name="ReverseStockSplitMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_ScheduleOfWarrantsValuationAssumptionsTableTextBlock" name="ScheduleOfWarrantsValuationAssumptionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_SellingGeneralAndAdministrativeMember" name="SellingGeneralAndAdministrativeMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_SeniorSecuredPromissoryNoteMember" name="SeniorSecuredPromissoryNoteMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_SeriesBWarrantsMember" name="SeriesBWarrantsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_ShareBasedCompensationExcludingDirectorsFees" name="ShareBasedCompensationExcludingDirectorsFees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_StockBasedFeesToDirectorsAndConsultants" name="StockBasedFeesToDirectorsAndConsultants" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_StockIssuedDuringPeriodSharesPeriodIncreaseDecreasePercentage" name="StockIssuedDuringPeriodSharesPeriodIncreaseDecreasePercentage" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_StockIssuedDuringPeriodSharesWarrantExercises" name="StockIssuedDuringPeriodSharesWarrantExercises" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_StockIssuedDuringPeriodValueWarrantExercises" name="StockIssuedDuringPeriodValueWarrantExercises" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_SubscriptionOrdersMember" name="SubscriptionOrdersMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_The2015EquityIncentivePlanMember" name="The2015EquityIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_The2023StockIncentivePlanMember" name="The2023StockIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_The2024NoteMember" name="The2024NoteMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_The2025NoteMember" name="The2025NoteMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_TotalWarrantsExercised" name="TotalWarrantsExercised" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_TotalWarrantsExpired" name="TotalWarrantsExpired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_TotalWarrantsForfeited" name="TotalWarrantsForfeited" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_TwoCustomersMember" name="TwoCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_UsefulLivesOfPropertyPlanAndEquipmentTableTextBlock" name="UsefulLivesOfPropertyPlanAndEquipmentTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_WarrantInducementAgreementMember" name="WarrantInducementAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_WarrantsOutstandingExercisePrice" name="WarrantsOutstandingExercisePrice" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="instant"/>
  <xsd:element id="bkyi_WarrantsOutstandingWeightedAverageRemainingLife" name="WarrantsOutstandingWeightedAverageRemainingLife" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_WavedronePlatformFromShoreHouseIvfMember" name="WavedronePlatformFromShoreHouseIvfMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_WeightedAverageExercisePriceWarrantsExercised" name="WeightedAverageExercisePriceWarrantsExercised" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_WeightedAverageExercisePriceWarrantsExpired" name="WeightedAverageExercisePriceWarrantsExpired" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_WeightedAverageExercisePriceWarrantsForfeited" name="WeightedAverageExercisePriceWarrantsForfeited" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="bkyi_WeightedAverageExercisePriceWarrantsGranted" name="WeightedAverageExercisePriceWarrantsGranted" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-a-the-company-and-summary-of-significant-accounting-policies-estimated-useful-lives-for-depreciation-and-amortization-details" name="statement-statement-note-a-the-company-and-summary-of-significant-accounting-policies-estimated-useful-lives-for-depreciation-and-amortization-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-a-the-company-and-summary-of-significant-accounting-policies-sharebased-compensation-expenses-for-continuing-operations-details" name="statement-statement-note-a-the-company-and-summary-of-significant-accounting-policies-sharebased-compensation-expenses-for-continuing-operations-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-a-the-company-and-summary-of-significant-accounting-policies-summary-of-accounts-receivable-details" name="statement-statement-note-a-the-company-and-summary-of-significant-accounting-policies-summary-of-accounts-receivable-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-a-the-company-and-summary-of-significant-accounting-policies-tables" name="statement-statement-note-a-the-company-and-summary-of-significant-accounting-policies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-b-revenue-from-contracts-with-customers-disaggregation-of-revenue-details" name="statement-statement-note-b-revenue-from-contracts-with-customers-disaggregation-of-revenue-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-b-revenue-from-contracts-with-customers-tables" name="statement-statement-note-b-revenue-from-contracts-with-customers-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-e-inventory-components-of-inventory-details" name="statement-statement-note-e-inventory-components-of-inventory-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-e-inventory-tables" name="statement-statement-note-e-inventory-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-f-equipment-and-leasehold-improvements-summary-of-equipment-and-leasehold-improvements-details" name="statement-statement-note-f-equipment-and-leasehold-improvements-summary-of-equipment-and-leasehold-improvements-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-f-equipment-and-leasehold-improvements-tables" name="statement-statement-note-f-equipment-and-leasehold-improvements-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-g-intangible-assets-and-goodwill-amortization-expense-details" name="statement-statement-note-g-intangible-assets-and-goodwill-amortization-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-g-intangible-assets-and-goodwill-tables" name="statement-statement-note-g-intangible-assets-and-goodwill-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-g-intangible-assets-summary-of-intangible-assets-details" name="statement-statement-note-g-intangible-assets-summary-of-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-i-accrued-liabilities-summary-of-accrued-liabilities-details" name="statement-statement-note-i-accrued-liabilities-summary-of-accrued-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-i-accrued-liabilities-tables" name="statement-statement-note-i-accrued-liabilities-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-k-leases-operating-lease-balance-sheet-information-details" name="statement-statement-note-k-leases-operating-lease-balance-sheet-information-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-k-leases-tables" name="statement-statement-note-k-leases-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-m-equity-summary-of-warrant-activity-details" name="statement-statement-note-m-equity-summary-of-warrant-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-m-equity-tables" name="statement-statement-note-m-equity-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-m-equity-valuation-assumptions-for-warrants-details" name="statement-statement-note-m-equity-valuation-assumptions-for-warrants-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-n-stock-options-option-activity-details" name="statement-statement-note-n-stock-options-option-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-n-stock-options-options-outstanding-and-exercisable-details" name="statement-statement-note-n-stock-options-options-outstanding-and-exercisable-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-n-stock-options-tables" name="statement-statement-note-n-stock-options-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-o-income-taxes-components-of-deferred-taxes-details" name="statement-statement-note-o-income-taxes-components-of-deferred-taxes-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-o-income-taxes-components-of-net-loss-details" name="statement-statement-note-o-income-taxes-components-of-net-loss-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-o-income-taxes-provision-for-income-tax-benefits-details" name="statement-statement-note-o-income-taxes-provision-for-income-tax-benefits-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-o-income-taxes-reconciliation-of-the-effective-income-tax-rate-to-us-federal-statutory-income-tax-rate-details" name="statement-statement-note-o-income-taxes-reconciliation-of-the-effective-income-tax-rate-to-us-federal-statutory-income-tax-rate-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-o-income-taxes-tables" name="statement-statement-note-o-income-taxes-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-q-earnings-per-share-eps-securities-excluded-from-the-diluted-per-share-calculation-details" name="statement-statement-note-q-earnings-per-share-eps-securities-excluded-from-the-diluted-per-share-calculation-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-note-q-earnings-per-share-eps-tables" name="statement-statement-note-q-earnings-per-share-eps-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="bkyi_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
