a business unit of Schlumberger Limited, and Domain Dynamics Limited, the UK
voice and signal specialist, announced a security breakthrough for
mobile phones which safeguards access to handsets by means of voice
authentication. Unlike previous attempts at introducing biometric
technology for this application, the new system runs on a SIM (subscriber
identity module) card and requires no additional hardware, making it cost
effective and simple to introduce.
The technology ensures that only legitimate users can access a phone — or
its resources, such as phonebooks — by using a locking mechanism, which
operates in the familiar fashion of a PIN code. Authentication simply
requires the user to speak a phrase or word as the phone is switched on,
which is compared in real-time with a reference voiceprint stored inside the
tamper-proof SIM card’s memory.
This unique voice authentication system provides an ideal solution for the
current problem of mobile handset and service theft. It also serves as a
secure safeguard for industry -advancements, as higher bandwidths start to
allow mobile phones to be employed for m-commerce and confidential
“Voice authentication is the most natural method of introducing state of the
art security into the mobile phone marketplace,” said Jorgen Rasmussen,
president, Cards at SchlumbergerSema. “By basing the solution on the
standardized SIM platform, it becomes cost effective and simple, providing a
highly flexible mechanism for operators to address the widespread public
concern over privacy and security.”
The new system has been developed through a partnership between
SchlumbergerSema, which provides the SIM ToolKit applet, Domain Dynamics
Ltd, which provides the voice authentication algorithm, and Mitsubishi
Electric Telecom, which has implemented the technology on the Trium Mondo
GSM/GPRS PDA phone.
The system is provided as a SIM ToolKit applet, which may be loaded onto any
standard Java Card( SIM. Leveraging the unique nature of the signal
processing algorithm designed by Domain Dynamics Ltd, and the lean nature of
the man-machine interface program, the applet is extremely small —
requiring just 2.5 Kbytes of memory in total.
This tiny memory usage includes everything required for the deployment and
use of voice authentication – from the enrollment process which lets a user
enter his or her voiceprint by repeating a chosen word or phrase three
times, through the generation of the reference biometric template which
stores the key characteristics of the voice, to the sign-on and comparison
procedure for daily use.
SchlumbergerSema is a leading information technology services company
providing consulting, systems integration, managed services, and products to
the telecommunications, energy and utilities, finance, transport, and public
sector markets. With nearly 30,000 employees serving customers in 65
countries, SchlumbergerSema is one of two business segments of Schlumberger
Limited, a global technology services company. For more information about
SchlumbergerSema, visit http://www.slb.com.
About Domain Dynamics
Domain Dynamics Ltd, the voice and signal specialist, provides powerful,
compact and cost-efficient solutions for word recognition, voice
authentication biometrics, signal processing, and machinery condition
monitoring. Now moved to new headquarters in Reading, the company is
focusing primarily on solutions to applications in noisy or restricted
environments such as are encountered in mobile telephony, smart cards,
e-commerce, transportation, condition monitoring, and toys and games.