>Please refer to my first mail. There are three basic problems that I see. >1. You don't want to publish your private information >2. Manual exchange is difficult Ridiculous! I give my phone to the other person and ask them to dial my number and call me. Now we both have a record of each others' phone numbers. >3. Face-to-face contact is not always available I can't believe that I'm reading this in an email message. Some people put their phone number in the signature block. Others type it in when requested. Most mobile devices have a way to sync a phonebook with a PC. Job done. >The proposed solution is the only one that addresses these three problems. Seems to me that you have only one real problem and we can adress that (number 1 above) by simply doing nothing. --Michael Dillon P.S. I did design a method vaguely similar to this for exchanging contact information between mobile phone users that required the support of the mobile network operator. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf