public void setSigningProtocol(String signingProtocol) {
        this.signingProtocol = signingProtocol;
    }
<p>
The signing protocol of the origin access control. The signing protocol determines how CloudFront signs
(authenticates) requests. The only valid value is <code>sigv4</code>.
</p>

@param signingProtocol
       The signing protocol of the origin access control. The signing protocol determines how CloudFront signs
       (authenticates) requests. The only valid value is <code>sigv4</code>.
@see OriginAccessControlSigningProtocols
aws-java-sdk-cloudfront/src/main/java/com/amazonaws/services/cloudfront/model/OriginAccessControlSummary.java