http://id.ubiqu.com/eidas/high is a level of assurance profile as defined by https://tools.ietf.org/html/rfc6711 and registered at https://www.iana.org/assignments/loa-profiles/loa-profiles.xhtml

This assurance profile identifies an eIDAS high and level of assurance 4 credential assurance using a ubiqu token.

assurance profile indicates a proof of possession field is present in the authentication token signed using a private key contained in a credential according to CEN TS 419 241-1 level 2 for authentication, as defined in ANNEX II of the eIDAS-Directive (EU 910/2014), of the person .

It may also be applied to electronic signatures complying to the eIDAS-Directive (EU 910/2014) employing a Secure Signature Creation Device (QSCD) compliant with Annex II and supported by a qualified electronic signature.