title: Identity Server 4 - IDX10630: PII is hidden
body: <p>I'm fairly new to using encryption and rsa tokens and I'm trying to get IDentityServer4 to not use the developersigning, but one of my own. Here is what I have tried so far:</p>
  
  <pre><code>var keyInfo = new RSACryptoServiceProvider().ExportParameters(true);
  var rsaSecurityKey = new RsaSecurityKey(new RSAParameters
  {
      D = keyInfo.D,
      DP = keyInfo.DP,
      DQ = keyInfo.DQ,
      Exponent = keyInfo.Exponent,
      InverseQ = keyInfo.InverseQ,
      Modulus = keyInfo.Modulus,
      P = keyInfo.P,
      Q = keyInfo.Q
  });
  
  services.AddIdentityServer()
  .AddSigningCredential(rsaSecurityKey)
  .AddInMemoryPersistedGrants()
  .AddInMemoryIdentityResources(Config.GetIdentityResources())
  .AddInMemoryApiResources(Config.GetApiResources())
  .AddInMemoryClients(Config.GetClients())
  .AddAspNetIdentity&lt;User&gt;();
  </code></pre>
  
  <p>However, when I run Identity Server4 and I get redirected to sign in page from another website, I get the following error:</p>
  
  <blockquote>
    <p>IDX10630: The '[PII is hidden]' for signing cannot be smaller than '[PII is hidden]' bits. KeySize: '[PII is hidden]'.
    Parameter name: key.KeySize</p>
  </blockquote>
  
  <p>I have to admit, I've been on this all weekend, trying to figure out how to use SigningCredentials and I'm not really sure what I've done wrong above.</p>