Old Second Bancorp Inc. has agreed to use IronKey Inc.'s Trusted Access security with its online banking and payments offerings.

Old Second, of Aurora, Ill., will offer IronKey's secure browser to business clients. This software prevents malicious programs from taking over an online banking session by creating a virtualized read-only environment on the user's computer for banking transactions.

Trusted Access "helps protect customers even if criminals have managed to install crimeware on their PC," says James Eccher, president and chief executive of Old Second, in a press release.

IronKey is based in Sunnyvale, Calif.