Android does not have the worst record for security
How do we want to measure this up? Number of viruses in the wild? Number of root exploits found? Number of bloatware on phones grants security problems? Availability? Number of patched security flaws? Open access to source code?
What measure do you want to use.
Number of viruses? android over 40? Iphone under 10?
Number of root exploits? Android, depends on the phone, but 5 or 6? Iphone, about 4 or so.
Number of bloatware on phones? Android, 5-10 per phone. Iphone-none.
Availability? Android has about 13 million. Iphone about 16 million.
Number of patched security flaws? About the same, but android patches them quicker.
And apple does not allow access to source code, so exploits are shots in the dark. Android does, but more eyes, more secure.
Bottom line, when it comes down to it. Getting a security issue on android is more likely then iphone. Blackberry and windows, really dont count, because the system are just not worth the effort to attack.
Apple has never had a virus on their market, android has had a few. The bloatware is a security issue.
Does that mean android is lesser then apple, no. It just means you can not be naive about the risks. Apple people are thousands of times more likely to fall for security issues. then android users.
But by any measure, android is the least secure of all the mobile os's, but that is a direct effect of the openness of the system.