DKIM usage shows significant growth

Posted by   Virus Bulletin on   Jun 29, 2009

US banks urged to use authentication method

In a report on its website, Internet giant Cisco states it has been seeing almost 700,000 non-spam messages that contain valid DKIM signatures per week - a number that has almost tripled since a year ago.

DKIM (DomainKeys Identified Mail) is an authentication method where the sending mail server adds a signature to the email header that can be used by the recipient to verify that the message has not been tampered with along the way. While not an anti-spam measure in itself (it is possible for spammers to sign their own messages) a DKIM signature combined with a trust relationship between sender and recipient can significantly reduce false positives.

The method is especially useful for senders whose domains are regularly targeted by phishers: by signing all their outgoing email, they implicitly tell recipients they can discard all email claiming to come from the domain that contains no, or an invalid, DKIM signature. Not surprisingly therefore, BITS, a division of The Financial Services Roundtable, has published a paper (PDF) in which it urges its members, most of which are US banks, to use DKIM and SPF for all email they send.

More information on mail authentication with DKIM can be found in two articles published in Virus Bulletin magazine recently (1, 2) (available to Virus Bulletin subscribers - subscription information can be found here).

Posted on 29 June 2009 by Virus Bulletin

twitter.png
fb.png
linkedin.png
hackernews.png
reddit.png

 

Latest posts:

VB2019 conference programme announced

VB is excited to reveal the details of an interesting and diverse programme for VB2019, the 29th Virus Bulletin International Conference, which takes place 2-4 October in London, UK.

VB2018 paper: Under the hood - the automotive challenge

Car hacking has become a hot subject in recent years, and at VB2018 in Montreal, Argus Cyber Security's Inbar Raz presented a paper that provides an introduction to the subject, looking at the complex problem, examples of car hacks, and the…

VB2018 paper and video: Android app deobfuscation using static-dynamic cooperation

Static analysis and dynamic analysis each have their shortcomings as methods for analysing potentially malicious files. Today, we publish a VB2018 paper by Check Point researchers Yoni Moses and Yaniv Mordekhay, in which they describe a method that…

VB2019 call for papers closes this weekend

The call for papers for VB2019 closes on 17 March, and while we've already received many great submissions, we still want more!

Registration open for VB2019 ─ book your ticket now!

Registration for VB2019, the 29th Virus Bulletin International Conference, is now open, with an early bird rate available until 1 July.

We have placed cookies on your device in order to improve the functionality of this site, as outlined in our cookies policy. However, you may delete and block all cookies from this site and your use of the site will be unaffected. By continuing to browse this site, you are agreeing to Virus Bulletin's use of data as outlined in our privacy policy.