When you hear about ‘hacking’,
you automatically think of attempts to gain access to your data, or your
website. Whilst these are of course very real threats that cost businesses
billions collectively, there is something else that is becoming a significant
problem, and that is telephone hacking, otherwise known as ‘toll fraud’ or
‘phreaking’.
What is Toll Fraud?
Toll fraud is carried out by
criminals who hack into phone systems and use them to make calls to premium
rate or international numbers. In doing so, they run up bills of thousands of
pounds. And it’s the owner of the line that is liable for the bill, without
exception.
Most toll fraud happens out of
hours when it is least likely to be detected. Evenings, weekends and bank
holidays are the most common times. The fraudsters are only too aware of the
lack of monitoring during these times and take the opportunity to dial into a
phone system, locate an unsecured voicemail box and start making calls to
wherever they choose.
What can Lead to Toll Fraud?
Problems mostly arise when
voicemail boxes, modems, routers, networks, phone systems and the computers
that operate them are not adequately password protected, perhaps because
passwords are left as default, rarely changed, written down, shared or just not
strong enough. Powerful auto diallers are used to randomly search for insecure
passwords, more often than not with great success.
Other ‘ways in’ include inbound
reverse charge calls and callers repeatedly asking to be transferred until they
reach an outside line. Operators should look out for continuous hang-ups on
inbound calls; wrong numbers; silent calls; callers asking for invalid
extension numbers and obscene calls. Expect deceit, cunning and persistence.
How to Head the Fight Against Toll Fraud
It is near impossible to
completely avoid toll fraud, but there are numerous measures that can be taken
in order to reduce the risk of it occurring. Here is a checklist:
- Educate all staff who use your telephone system in any way in the dangers of toll fraud
- Introduce policies on accepting reverse charge calls: either say no altogether, ban any from overseas or verify the identity of the caller.
- Restrict outbound calls to all or selected overseas destinations.
- Consider placing restrictions on outbound calls from certain extensions or on the quantity that can be made or the times dialling out is permitted. For example you could put a halt on outbound evening or weekend calls.
- Ensure mailbox system passwords are strong and regularly changed. Never share passwords.
- Disable conference facilities if not required or regularly change the access codes.
- Install a voice firewall and consider a line monitoring service that will identify any suspicious activity.
You should be aware that you are
responsible for your telephone line security, and therefore liable for any
calls that are charged to your account, whether or not they are the result of
criminal activity. Take steps today to ensure you are doing everything you can
to protect your business from costly risks of toll fraud. Your bookkeepers will be able to point
you in the right direction of service providers who can help you.