Technology that cross references image hash codes against child sexual abuse material will help businesses avoid legal liability.
NetClean, which works with 25 police forces to fight child sexual abuse, has incorporated the cross-referencing technology in the latest version of its content inspection product.
NetClean says there is a growing trend of paedophiles sharing illegal material through the networks of unsuspecting employers.
"It is the responsibility of every business to keep their network clean from illegal child sexual abuse material," says Pelle Gara, co-founder of NetClean.
The file matching technology is linked with police databases to alert company bosses, IT managers and HR chiefs when employees view illegal child sexual abuse content.
"This breakthrough will catch paedophiles who often slip through the net by using file sharing networks, USB sticks and social media sites to avoid detection," says Pelle Gara.
Details of the danger of paedophiles viewing and sharing child sexual abuse material on UK business networks are contained in the Cleaning Up Britain report.