Dictionary attack e-mail identification
US7406503B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2003 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | May 20, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q10/107
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
User IDs in addresses to which an e-mail is addressed are logically ordered into a 2D matrix of rows each having one user ID. For each column in the 2D matrix, a column count is found by counting the highest number of matching characters in the column. A column quotient is calculated for each column by dividing the column count by the total number of rows in the 2D matrix. A weighted column quotient is calculated for each column by multiplying the column quotient by a weight that is based on the left-to-right order of the column in the 2D matrix. A numerical assessment is made of the similarity of the user IDs in the addresses to which the e-mail is addressed by adding up the weighted column quotients for the columns in the 2D matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.