Lightspeed, a retail point-of-sale company that provides cloud-based services to 38,000 clients, has reported that its central database, which stores client information on sales, products, encrypted passwords, and in some instances, electronic signatures, has been compromised.

The system that was compromised was the one that retailers can access through tablets, smartphones, and other mobile devices.

Lightspeed is suggesting that clients change their passwords. The compromise of the digital signatures is also concerning, so companies that receive the email notifying them to change passwords, may wish to look further into the compromise of the digital signatures as well.