[WEB SECURITY] New two-stage login procedure
WMillican at hutchison.com.au
Wed Dec 13 03:06:58 EST 2006
I agree with what Mark's said below.
I think complexity is being added from a user point of view, for little gained security. What are these new measures trying to secure against? As Mark as said, details are being added that a potential hacker can use to hijack an account (he's got account code, last name, dates, times, and memorable dates now).
Shoulder surfing is still at the same level of risk. The PIN protection from randomising the order and only use 3/4, would not combat spyware/trojan/rootkits. It may slow it down, but only for a max of 3 login attempts.
I'd like to comment on the previous logon date/time. I've seen this used a few times before, where it was actually effective. This should NOT be presented until AFTER a validated login.
I'm very happy to see the banks are actively working on their websites and security, but I do not think this is the answer.
I'd like to see more banks using one time passwords sent to the mobile number of the user on their DB(below)
1)User hits login
2)Types in Acct number
3)user hits generate OTP (mobile number is linked to account details)
4)User gets SMS with OTP
5)User enters PIN + OTP
6) User logs in.
>From a user PoV, it's 1 extra step, and adds 2+ layers of security. The only issues I can see with this is delayed messages, mobile roaming (a backup for of OTP is required). Anyone want to tear apart that? :P
>>> "Mark Mcdonald" <mmcdonald at staff.iinet.net.au> 13/12/2006 6:28 pm >>>
Where do we start...
Inputting the PIN digits and the 'significant date' gives potential phishers even more information about the victim they could use to phone the bank and go to town with.
Using randomly placed digits on a keypad prevents only a JS mouse-movement replay attack and allows anyone in the room to see what's being entered.
The last three digits & the date of last login sound like information you need when you call up the bank and can't provide your password. Putting them on a web page exposes a little too much information I think, particularly when you only need a (potentially cached) login number and the persons surname, although it may make phishing slightly harder.
It looks like they're trying to close one door but inadvertently opening more. I'd like to see commentary from the experts around here though...
> -----Original Message-----
> From: Gervase Markham
> Subject: [WEB SECURITY] New two-stage login procedure
> A financial institution with which I have connections has just come up
> with this:
> Leaving aside the inaccessibility of their chosen method of demoing,
> what do people think?
> The Web Security Mailing List:
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