public String getSigningProtocol() {
        return this.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>

@return 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