<SEC-DOCUMENT>0001179110-20-010637.txt : 20201021
<SEC-HEADER>0001179110-20-010637.hdr.sgml : 20201021
<ACCEPTANCE-DATETIME>20201021174405
ACCESSION NUMBER:		0001179110-20-010637
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20201009
FILED AS OF DATE:		20201021
DATE AS OF CHANGE:		20201021

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Paxton Mark Alan
		CENTRAL INDEX KEY:			0001487018

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39608
		FILM NUMBER:		201251216

	MAIL ADDRESS:	
		STREET 1:		1101 EAST ARAPAHO ROAD
		STREET 2:		SUITE 200
		CITY:			RICHARDSON
		STATE:			TX
		ZIP:			75081

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INTRUSION INC
		CENTRAL INDEX KEY:			0000736012
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER COMMUNICATIONS EQUIPMENT [3576]
		IRS NUMBER:				751911917
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1101 ARAPAHO ROAD
		CITY:			RICHARDSON
		STATE:			TX
		ZIP:			75081
		BUSINESS PHONE:		9722346400

	MAIL ADDRESS:	
		STREET 1:		1101 ARAPAHO ROAD
		CITY:			RICHARDSON
		STATE:			TX
		ZIP:			75081

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTRUSION COM INC
		DATE OF NAME CHANGE:	20000601

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ODS NETWORKS INC
		DATE OF NAME CHANGE:	19970507

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OPTICAL DATA SYSTEMS INC
		DATE OF NAME CHANGE:	19950517
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-10-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000736012</issuerCik>
        <issuerName>INTRUSION INC</issuerName>
        <issuerTradingSymbol>INTZ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001487018</rptOwnerCik>
            <rptOwnerName>Paxton Mark Alan</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1101 E. ARAPAHO ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>RICHARDSON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75081</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-10-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>219469</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>8</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>219469</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Common stock sold under an effective registration statement.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Michael L. Paxton as Attorney in fact for Mark A. Paxton</signatureName>
        <signatureDate>2020-10-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex24map.txt
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
Power of Attorney

The undersigned hereby constitutes and appoints Michael L. Paxton,
CFO, Secretary and Treasurer of Intrusion Inc., and each signing
singly, the undersigned's true and lawful attorney-in-fact to:
(1)        execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer and/or director of (the "
Company" ), Forms 3, 4, 5 and Schedule 13D/G in accordance with
Section 16(a) of the Securities Exchange Act of 1934 and the rules
thereunder; and (2)	do and perform any and all acts for and on
behalf of the undersigned which may be necessary or desirable to
complete and execute any such Form 3, 4, 5, and Schedule 13D/G and
timely file such form with the United States Securities and Exchange
Commission and any stock exchange or similar authority, if required.
The undersigned hereby grants to each such attorney-in-fact full
power and authority to do and perform any and every act and thing
whatsoever requisite, necessary, or proper to be done in the
exercise of any of the rights and powers herein granted, as fully
to all intents and purposes as the undersigned might or could do
if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of
this power of attorney and the rights and powers herein
granted.  The undersigned acknowledges that the attorneys-in-
fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any
of the undersigned's responsibilities to comply with Section 16
of the Securities Exchange Act of 1934.
This power of attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms 3, 4,
and 5 with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier
revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.
IN WITNESS WHEREOF, the undersigned has caused this power of
attorney to be executed as of this 11th day of March, 2010.

 /s/Mark A. Paxton
Signature


 Mark A. Paxton
Print Name




</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
