ters>Adapters</h4><ul><li><p><strong>SignalFX</strong>. There is a new <code>signalfx</code> adapter.</p></li><li><p><strong>Stackdriver</strong>. The <a href=https://istio.io/v1.6/docs/reference/config/policy-and-telemetry/adapters/stackdriver/><code>stackdriver</code></a> adapter has been substantially enhanced in this
release to add new features and improve performance.</p></li></ul><h3 id=security>Security</h3><ul><li><p><strong>Authorization</strong>. We&rsquo;ve reimplemented our <a href=/v1.22/docs/c