Information typed on a wireless keyboard can easily be intercepted or snooped on, a cybersecurity research firm has warned.

San Francisco-based Bastille said these keyboards transmit what is being typed without any encryption, making the "text very clear" and possible for hackers to access from a distance of up to 76m (250ft) away.

The firm added that earlier in 2016, wireless mice were also insecure to use as their research showed attackers can spoof poorly protected signals, letting them use PCs as if they were sitting in front of them.