The systems will give BT the ability to manage users' passwords and log-in details from a single location. The passwords give access to the telecom company's back-office systems and public internet sites.
A spokesman said, "The driving force is a platform to authenticate a common infrastructure for identity management for use by business partners and employees. We expect to get service improvement and cost reduction."
The project will allow BT, which is investing in a range of Netegrity access and authentication products, to implement a single security policy. The software will also help BT ensure that the passwords of staff leaving the company are promptly deactivated to avoid security breaches.
BT said Netegrity's products would provide a ready-made security infrastructure that would allow it to develop online applications and services more quickly.
"Identity and access management technology will be one of the key enabling technologies for BT's future network and systems infrastructure," said Paul Kenny, BT systems manager.
BT will roll out Netegrity's Siteminder, Indentityminder and Transactionminder, which operate across a range of platforms.