| 摘要 |
<p>Methods and systems of versioning and identifying a user's contact information and selectively preserving the anonymity of the user's contact information are provided. A user's information may be disclosed only to other registered users of the system which have access to the specific key. The key is also suitable for online distribution as well as for application on a business card / printed media. The tagging of a business card or other printed material with a versioned key allows human and machine readable versioned keys providing selective and secure access to contact information.</p> |
