The .tel platform includes a friending mechanism for controlling access to published contact information. In fact, any NAPTR data can be secured and made private to any friend. For example, if Alice owns alice.tel and she has friends Bob and Charlie, she could make her office telephone number public, restrict her email address to be shown only to Bob and Charlie, and make her home phone number viewable only by Bob.
Private data is encrypted and stored inside NAPTR records of type "x-crypto". The X-Crypto NAPTR has been designed not to break IANA ENUM service type formats and abide by the IETF "ENUM Experiences" document.
The process to secure data consists of three procedures that are performed by the encryption routines:
Note: We do NOT recommend storing sensitive personal information such as credit card numbers inside a .tel domain. This is not the purpose of the .tel.
The public-private key pair technique can be used for secure data exchange bypassing the official .tel friending system. All you need to know is how to decrypt your friends encrypted data.
|ENUM Experiences: IETF Document on ENUM issues and experiences|
|Whitepaper: Protecting .tel Contact Data|