PEAPv1 With EAP-GTC
PEAPv1/EAP-GTC was created by Cisco to provide interoperability with existing token card and directory based authentication systems via a protected channel. Even though Microsoft co-invented the PEAP standard, Microsoft never added support for PEAPv1 in general, which means PEAPv1/EAP-GTC has no native Windows OS support. Since Cisco has typically recommended lightweight EAP protocols such as LEAP and EAP-FAST protocols instead of PEAP, PEAP has not been as widely adopted as some had hoped.
With no interest from Microsoft to support PEAPv1 and no promotion from Cisco, PEAPv1 authentication is rarely used. Even in Windows 7, released in late 2009, Microsoft has not added support for any other authentication system other than MSCHAPv2.
As of 2010, there are very few operating systems with native support for this EAP protocol. Nokia E66 and later mobile phones ship with a version of Symbian which includes EAP-GTC support.
Read more about this topic: Protected Extensible Authentication Protocol