This paper presents the results of a security and usability review of the authentication implementations used by more than 10 UK banks. Our focus is on their use of dual text credentials that combine two passwords, PINs, or challenge questions (and some "partial selection" variations). We model the authentication protocols based upon several deployment choices, such as the credential rules, and use the model to compare the security and usability properties of the implementations. Our results indicate some variation and inconsistency across the UK banking industry, from which we offer some suggestions for improved authentication protocol design.
|Title of host publication||2012 International Conference for Internet Technology and Secured Transactions, ICITST 2012|
|Number of pages||6|
|Publication status||Published - 1 Jan 2012|