what is the meaning of data sharing b/w countries

[gmohiuddin]

what is the meaning of data sharing between usa, canada, aus and uk. this has data shared after 9/11 or before
and how long thay have stored data

 

[barsindoo]

Data that dates back many years about a person is usually made available in a central location to aid participating countries in making decisions about migration and security issues.

This data can pre-date 9/11.

 

[tonnyinchina]

what is the meaning of data sharing between usa, canada, aus and uk. this has data shared after 9/11 or before
and how long thay have stored data

Data sharing basically means...Information sharing e.g Between the listed countries they can share information regarding security status of a person or any other information of importance, when need arises etc.