In small embedded systems, WLAN security features applied are usually various forms of encryption such as WPA-PSK, WPA2-PSK. Typically, the assigned authentication key is the same for all distributed wireless units. However, with EAP-TLS, each wireless client is assigned a unique authentication certificate.
New connectBlue WLAN UART Serial Port Module OWS451s are shipped with the added-on EAP-TLS feature whereas customers who have installed OWS451 modules can download upgrade firmware from the connectBlue support site. EAP-TLS makes it possible to centrally manage individual units when one, for example, would like to centrally revoke a certain client’s certificate. Thanks to the client-side certificate, security is also sustained as a compromised password is not enough to break into EAP-TLS enabled systems as the potential intruder would also need the client-side private key. Both these advantages make EAP-TLS beneficial in demanding factory automation and medical installations.