客户端上的OWIN访问令牌存储

Question

我正在使用C＃OWIN，我能够访问和刷新令牌，但是问题是我应该将其存储在客户端上，从安全角度来看，我认为在客户端存储不是一种好习惯更好的存储方式是在某些Web服务器上，在nodejs或C＃mvc Web应用程序中确实有任何代码指针。

public class SimpleRefreshTokenProvider : IAuthenticationTokenProvider
    {
       private static ConcurrentDictionary<string, AuthenticationTicket> _refreshTokens = new ConcurrentDictionary<string, AuthenticationTicket>();

        public async Task CreateAsync(AuthenticationTokenCreateContext context)
        {
            var guid = Guid.NewGuid().ToString();


            _refreshTokens.TryAdd(guid, context.Ticket);

            // hash??
            context.SetToken(guid);
        }

        public async Task ReceiveAsync(AuthenticationTokenReceiveContext context)
        {
            AuthenticationTicket ticket;

            if (_refreshTokens.TryRemove(context.Token, out ticket))
            {
                context.SetTicket(ticket);
            }
        }

        public void Create(AuthenticationTokenCreateContext context)
        {
            throw new NotImplementedException();
        }

        public void Receive(AuthenticationTokenReceiveContext context)
        {
            throw new NotImplementedException();
        }
    }

    // Now in my Startup.Auth.cs
    OAuthOptions = new OAuthAuthorizationServerOptions
    {
        TokenEndpointPath = new PathString("/api/token"),
        Provider = new ApplicationOAuthProvider(PublicClientId,UserManagerFactory) ,
        AuthorizeEndpointPath = new PathString("/api/Account/ExternalLogin"),
        AccessTokenExpireTimeSpan = TimeSpan.FromMinutes(2),
        AllowInsecureHttp = true,
        RefreshTokenProvider = new RefreshTokenProvider() // This is my test
    };