1.   Lewis said he knows of at least one large Internet service provider that also provides shopping cart software that is reviewing the security of all its sites.

2.   The shopping cart software, if installed incorrectly, saves customer order information in an unsecured file, Harris said.

3.   When correctly installed, shopping cart software creates a file for confidential information that is inaccessible to outsiders.

4.   While Curry would not reveal specifics about Amazon security, he said the company does not use off-the-shelf shopping cart software.