If you're still using a cellphone based on early digital standards, you better be careful what you say. The encryption technology used to prevent eavesdropping in GSM (Global System for Mobile communications), the world's most widely used cellphone system, has more security holes than Swiss cheese...

DigiNotar B.V., a unit of VASCO Data Security International, Inc., is an Internet Trust Service Provider based in the Netherlands. Part of their business involves issuing digital certificates.

A la Mobile has added advanced security features to its embedded Linux stack for mobile phones. New security-oriented features in its Convergent Linux Platform (CLP) are said to include pre-boot OS signature checks, filesystem encryption, application sandboxing, and secure OTA (over-the-air) firmware upgrade capabilities.

Several security firms are warning against a Beselo worm that targets Nokia 6630, 7610, 6680, and N70 smartphone models. A new mobile virus, referred to as the Beselo worm, has several security firms concerned about Nokia (NYSE: NOK) smartphones getting infected. One such firm, SMobile Systems, said it has issued a disinfection tool to contain the virus.
F-Secure, an anti-virus and intrusion prevention provider, first posted an alert regarding the virus in its blog last week. The virus is said to affect smartphones running the Symbian S60 Second Edition operating system.

The open-source Linux operating system is seeing major growth in the mobile and embedded space, especially in the smartphone market. Handset makers and mobile carriers are adopting open-source software because it significantly reduces licensing and development costs and also provides higher flexibility.

Note that I'm not giving google much advance warning: I mentioned few
of those issues on irc, but they seemed not welcome there. And purpose
of security system of t-mobile g1 is not to protect owner from evil
attacker; rather it prevents owner from using his phone. g1, as
shipped, will not for example allow connecting your notebook to the
internet.

Disk encryption is not something most personal computer users think of when they consider ways to boost the security profile of their computer. A firewall? Yes, that in the minds of most is what computer security is all about. However, a firewall is a network security tool, and it is useless if your computer is lost or stolen. That is when disk encryption comes into play.

Mobile Linux is well poised to take on the surging smartphone market according to a report from the Strategy Analytics Handset Component Technologies Service.

There have been multiple efforts from multiple vendor groups over the last 5 years to develop a successful mobile Linux operating system.