Ian Kilpatrick, chairman of IP security specialists Wick Hill Group, writes:
Smartphones are spreading throughout the business world. Their use is growing across organisations and at all levels.
According to Gartner, sales of mobile devices in the second quarter of 2011 grew 16.5% year-on-year. Smartphone sales grew 74% year-on-year and accounted for 25% of overall sales in the second quarter of 2011, up from 17% in the second quarter of 2010.
Not only are the numbers of smartphones growing, their versatility is increasing. Where staff used to carry laptops when they went out of the office, to retrieve email and use other applications on the move, they can now carry just a smartphone.
This potentially allows them to send and receive emails, use a variety of applications, link to the company network to access data and use network-based applications, access social networking sites, and carry out online e-commerce and banking transactions.
A smartphone raises key security issues, which many organisations have not fully realised yet or, if they have, they may not have taken appropriate measures to ensure network safety.
The biggest danger, of course, is that smartphones go missing. Many of us will have lost a mobile phone in the past or know someone who has. Research by getsafeonline shows that about one in five owners of smartphone devices can expect to lose or have them stolen at some point. Surveys show the level of phone loss in London taxis is at a world-leading, and fairly consistent, 10,000 per month. Yes, that’s right, 10,000 per month!
Smartphones are often used for both business and personal reasons and if they are lost, both sensitive company data and personal data stored on the phone may be exposed. Email exchanges could be seen. Personal data relating to online purchasing or banking might be viewed.
If the phone is connected via a VPN, company networks are exposed to malware or could be hacked. Philippe Winthrop, an analyst at consultancy Strategy Analytics Inc., commented: "If I take your device and muck around with it, what if the VPN is set up on it? It's a huge risk not being dealt with enough today."
Getsafeonline’s Tony Neate says: "Users must remember that they are essentially carrying around a tiny laptop with a wealth of personal information that is very attractive to fraudsters."
Smartphones are now at the stage that PCs were at around 1999. Many people didn’t think security was necessary then, hardly anyone had firewalls, but security concerns were beginning to be a focus. It’s a similar situation now with smartphones.
For example, last year the MMS Bomber virus affected millions of mobile users in China, costing them significant sums dialling out on their phones.
It doesn't take long for criminals to think of ways of stealing and using information fraudulently. Some security experts have pointed out that targeting smartphones could potentially be more profitable for criminals than aiming at computers.
With the rapid proliferation of smartphones and the very real security risks, organisations now need to factor smartphone use into their security policies and make sure they are managed centrally.
Smartphones have also extended the network boundary even further. Employees may use devices for both company and personal use, bringing dangers to the company network, in the same way that remote workers created new and different security issues for the IT department.
In addition, these devices cross the divide between voice and data, so that companies using them are taking a strategic direction into convergence, perhaps without realising it, and probably without planning for it. They are at the cutting edge of fixed and mobile convergence and users are only rarely required to connect over secure VPNs and even less required to use secure authentication to connect to the network.
Fixed/mobile convergence creates other security and financial threats. Unsecured access to PBX systems (traditional and IP) exposes organisations to an increased risk of toll fraud, as well as risks such as DOS attacks, backdoor attacks on the data network, and call recording.
There are a number of basic security procedures which organisations and individuals can take to increase security.
* Use the PIN or passcode function to secure the phone. Don’t rely on the default factory settings.
* Install data wiping facilities so critical information can be destroyed if it’s thought the phone has fallen into the wrong hands. This might happen, if for example, a password is entered wrongly a certain number of times, or when a device has been off the network for a certain period of time.
* Employ time out policies, to prevent further use of the phone, if it is inactive for a certain period of time. This should be initiated from a central management console.
* Install GPS tracking so the phone can be located if stolen.
* Install SIM watch. This reports the new number back to you if the SIM is removed and replaced
* Take a note of your International Mobile Equipment Identity number. The IMEI number is used by the GSM network to identify valid devices and therefore can be used for stopping a stolen phone from accessing the network in that country. It’s easy to find on most phones by typing *#06# into the keypad.
* Take similar data leakage protection measures as with a PC.
- treat the phone like it’s a PC. Beware of phishing emails, don’t follow links you’re not sure of, don’t download anything suspect, recognise the risks of unsecured WiFi connections, etc.
- stipulate that sensitive, critical information should be made available to users of smartphones on a ‘need to know’ basis
- use two factor authentication (with challenge response) to validate access to the smartphone
- encrypt sensitive data, as many smartphones and security suppliers provide facilities to enforce this.
There is often as much data on a smartphone, as on a laptop, but it is more vulnerable to loss or theft. The ICO (Information Commissioner’s Office) has now started fining organisations which lose unencrypted data that should have been secured.
- run anti-virus. The impact of a virus, both in terms of data loss and financial cost, is considerable
Commercial security solutions for smartphones are available from a number of vendors such as Kaspersky Lab, CRYPTOCard and Check Point.
Kaspersky Lab’s Mobile Security 9, for example, helps users to safely browse the web and communicate via social networks. Features include inbuilt GPS to locate a lost or stolen smartphone, protection from malware and network attacks with real-time anti-malware scans, automatic updates and blocking of dangerous network connections.
Smartphones are an incredible tool for a whole range of people and their use will proliferate. However, smartphone security is lagging ten years behind the growth curve, especially as they are so easily lost or stolen.
Smartphones carry with them the risks of any computer on a network and at the same time cross the divide between voice and data, which brings security risks of its own. For an organisation to remain secure, smartphones need to come within the sphere of the security policy, their use needs to be regulated and active steps should be taken to employ them securely.