“Even as IT pros wrestle with the bring-your-own-device (BYOD) trend, corporate security is being further complicated by another emerging trend: bring your own network (BYON).
BYON is a by-product of increasingly common technology that allows users to create their own mobile networks, usually through mobile wireless hotspots. Security professionals say BYON requires a new approach to security because some internal networks may now be as insecure as consumer devices.”
Source:New security threat at work: Bring-your-own-network – Computerworld