Advertisers are using new methods to collect information to identify mobile phone users, while Apple is moving to protect user privacy and block those same advertisers’ methods.
A year ago, Apple discouraged developers from accessing its devices’ UDIDs, a 40-character code that uniquely identifies its mobile devices. Now, advertisers are hoping to take advantage of two other identifying pieces of data: the device’s OpenUDID; or, its Open Device Identification Number (ODIN), VentureBeat reports.