Apps will need to develop their own unique identifiers for different users, and ad networks will need to find a new way to build mobile user profiles.

FORBES: Apple Will Make It Harder For Apps To Track iPhone/iPad Users

The certificate itself contains the issuer's name (for example, Chase Manhattan), a serial number, a signature algorithm ID, an expiration date, an employee's public key and unique identifiers for both the issuer and the employee.

CNN: Technology - E-Signature Act may drive demand for authentication technology

Last week, hacker group AntiSec, and offshoot of the hacking group Anonymous, claimed that it has stolen the unique device identifiers (UDIDs) belonging to 12 million iPhones, iPads and iPod touches.

FORBES: iPhone And iPad UDID Data Not Stolen From FBI

Hacking group AntiSec (connected to Anonymous and LulzSec) made some bold claims Tuesday that it had obtained the unique device identifiers (UDIDs) of 12 million iOS devices from an FBI laptop, setting more than a few people on edge.

ENGADGET: Apple denies giving FBI any iOS device UDIDs, raises questions over AntiSec claims

Using unique alphanumeric identifiers for financial firms would improve OTC derivatives markets, make it easier for regulators to see aggregated risk, and, once systems were changed over, would simplify record keeping, improve operational efficiency for firms and eliminate a lot of reconciliation work, according to a report the BIS issued from the Committee on Payment and Settlement Systems and the Technical Committee of IOSCO.

FORBES: BIS and IOSCO Dither on Requiring Legal Entity Identifiers (LEI)