<div dir="auto">Perhaps not for a phone co. But certainly for a bank. It must be part of the security consideration.<br><br><div data-smartmail="gmail_signature">thx ..Tom (mobile)</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Mar 18, 2019, 3:22 PM George Fletcher via Openid-specs-ab <<a href="mailto:openid-specs-ab@lists.openid.net">openid-specs-ab@lists.openid.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div text="#000000" bgcolor="#FFFFFF">
    <font face="Helvetica, Arial, sans-serif">Interesting. Seems like if
      the app is doing something malicious with the webview flows, they
      would already be in violation of ToS and hence could have their
      client_id revoked. It doesn't seem like a special clause about
      "spoofing user-agents" would be required. Thanks for the info!</font><br>
    <br>
    <div class="m_4221662759777335055moz-cite-prefix">On 3/18/19 5:01 PM, Filip Skokan via
      Openid-specs-ab wrote:<br>
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    <blockquote type="cite">
      
      <div dir="ltr">Last I heard from Iain and William (~2 years ago)
        is that there's a blacklist of user-agent strings plus a terms
        of service agreement that spoofing user-agents is forbidden and
        could result in the application's permissions being revoked.
        <div><br clear="all">
          <div>
            <div dir="ltr" class="m_4221662759777335055gmail_signature" data-smartmail="gmail_signature">S pozdravem,<br>
              <b>Filip Skokan</b></div>
          </div>
          <br>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Mon, 18 Mar 2019 at 20:16,
          Nat Sakimura via Openid-specs-ab <<a href="mailto:openid-specs-ab@lists.openid.net" target="_blank" rel="noreferrer">openid-specs-ab@lists.openid.net</a>>
          wrote:<br>
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        <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div dir="auto">Google apparently is banning a request from
            WebView so there has to be a way to detect it at least on
            Android. Or are they just depending on the user agent header
            string which is totally spoofable? </div>
          <br>
          <div class="gmail_quote">
            <div dir="ltr" class="gmail_attr">2019年3月19日(火) 2:05 George
              Fletcher via Openid-specs-ab <<a href="mailto:openid-specs-ab@lists.openid.net" target="_blank" rel="noreferrer">openid-specs-ab@lists.openid.net</a>>:<br>
            </div>
            <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
              <br>
              I'd like to have a discussion around security and
              authentication flows <br>
              occurring with the system browser vs a webview. I get the
              potential <br>
              security risk but I don't think we have any guidance on
              how an IdP is <br>
              supposed to ensure whether requests are coming from the
              system browser <br>
              vs a webview.<br>
              <br>
              Thanks,<br>
              George<br>
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