Feeds

Police expert admits mobile phone forensics barrier

Absence of operating system standards to blame

Providing a secure and efficient Helpdesk

A police digital forensics expert has admitted that some mobile phones are impenetrable to software used by police in forensic examinations. The revelation follows a paper by a Cambridge researcher which originally made the claim.

"There are some phones that are not supported by any tools," said Kevin Mansell, a hi-tech crime trainer for Centrex, the police training authority. Among other disciplines, Mansell trains officers in retrieving data from mobile phones.

"But it's important to remember that data on phones can always be retrieved manually, just as you would navigate through your own phone," Mansell told OUT-LAW.

The claim that some models of mobile phone are impenetrable to police forensic searches came from a Cambridge University researcher. Tyler Moore, a PhD student in computer security at Cambridge, analysed the way police forces conduct digital forensics. He found that a lack of phone operating system standards means that forces do not always have the right tool to penetrate a phone.

"Uncommon phone types are often inaccessible with standard software products," he told OUT-LAW. "This is an undesirable outcome for law enforcement, and it is a direct consequence of mobile phone manufacturers' choosing to store data in proprietary formats rather than standard ones."

Retrieving data from mobile phones has become a vital part of police work, Mansell said. "Law enforcement is examining mobile phones every single day. Think how much you use your phone, how long you've had it," he said. "The longer you have it the more it becomes a fingerprint of the way you live your life. That is of interest if you are a suspect, a victim or a witness in a case."

Moore chose to examine the differences between forensics for computers and for mobile phones. Computers store information in standardised formats, making data relatively easy to retrieve. The fact that mobile phone manufacturers write their own operating systems has serious implications for policing, he argues.

"The main point of my paper is to introduce principles from economics to digital forensics," said Moore. "Most law enforcement agencies face very real budget constraints, so they are sensitive to the costs of extracting data from digital devices for forensic examination."

"The cost of extracting data on mobile phones is higher, since software has to be individually developed for each manufacturer and tailored to individual models.

"Some tools work with 200 phones, but when you think that a phone that comes in for examination could come from any manufacturer and be from the last 10 to 15 years, you see that 200 is only a fraction of the total," said Mansell.

The sheer number of phones to be examined in cases poses a challenge for the police. "Volume is an issue, but one that can be dealt with by resourcing and hopefully with new and better forensic tools," said Mansell.

Mansell pointed out that time-consuming manual examination can still retrieve phone data. There does not, though, appear to be an easy solution to retrieving deleted data on a phone for which there is no examination software.

Though mobile phone networks keep some data, it is often not as detailed as the police would like. "Law enforcement would like them to keep everything and forever," said Mansell. "In reality it ends up being a compromise."

Copyright © 2006, OUT-LAW.com

OUT-LAW.COM is part of international law firm Pinsent Masons.

Choosing a cloud hosting partner with confidence

More from The Register

next story
Same old iPad? NO. The new 'soft SIMs' are BIG NEWS
AppleSIM 'ware to allow quick switch of carriers
Arab States make play for greater government control of the internet
Nerds told to get lost in last-minute power grab bid at UN meeting
Brits: Google, can you scrape 60k pages from web, pleeease
Hey, c'mon Choc Factory, it's our 'right to be forgotten'
Of COURSE Stephen Elop's to blame for Nokia woes, says author
'Google did have some unique propositions for Nokia'
It's even GRIMMER up North after MEGA SKY BROADBAND OUTAGE
By 'eck! Eccles cake production thrown into jeopardy
Mobile coverage on trains really is pants
You thought it was just *insert your provider here*, but now we have numbers
Don't mess with Texas ('cos it's getting Google Fiber and you're not)
A bit late, but company says 1Gbps Austin network almost ready to compete with AT&T
prev story

Whitepapers

Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
Win a year’s supply of chocolate
There is no techie angle to this competition so we're not going to pretend there is, but everyone loves chocolate so who cares.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.