For HTTP(S) stuff, HTTP authentication (basic or digest auth). However, better would be to use SASL (which is usable with many protocols, although I think HTTP(

For HTTP(S) stuff, HTTP authentication (basic or digest auth). However, better would be to use SASL (which is usable with many protocols, although I think HTTP(S) unfortunately doesn't), and then from that to have some sort of SASL method which allows decentralized authentication like OpenID but does not require a web browser. What I hate is using a telephone number (I don't want them to call me on the telephone, and other people in my house might use the same service so then that won't work so well!), Gmail (I don't use it), GitHub (again I don't use it), Facebook (again I don't use it), etc.