Method and system for dispensing and verification of permissions for delivery of electronic messages
US7444380B1 · kind B1 · utility
33Cited by
13References
35Claims
0Family size
Inventor
Key dates
| Filing date | Jul 13, 2004 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Jan 14, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/145
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
System and method for delivery of an electronic message from a sender unknown to a recipient when such message comprises a sender code verified by recipient's electronic message handler, thereby eliminating delivery of unsolicited bulk messages. Dispensing sender codes per recipient addresses thwarts senders of unsolicited bulk messages. Dispensing sender codes upon successful response to a human response question further thwarts bulk senders. Sender code calculation according to periodically changing factors limits sender code utility to finite time periods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.