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Intelligence Briefings from the War on Spam

Archive for the ‘Internet Service Providers’ Category

Defcon 2014: Blackphone Beefs Up Android Security

Sunday, August 10, 2014 by Andrew Conway

The vendor area at Black Hat goes by the name of The Business Hall, and that sums it up. It is full of security companies, large and small, pitching their products in typical trade show fashion. The vendor area at Defcon is not like that. It is a jumble of vendors selling hacker equipment, lock […]

Cloudmark’s 2014 Q2 Global Messaging Threat Report

Wednesday, July 16, 2014 by Tom Landesman

Spammers and attackers in both email and SMS were quick to redouble their efforts this quarter. In our 2014 Q2 Global Messaging Threat Report, we take a look at some of these various new trends popping up around the world. Comically, email phishers were quick to exploit the Heartbleed exploit without using the exploit. Deploying […]

Twenty Years of Spam

Friday, April 11, 2014 by Andrew Conway

April 12th is the 20th anniversary of the first large scale commercial spam – the infamous “Green Card Lawyers” message that was posted to every newsgroup on Usenet News (right). Though there were attempts at spamming starting as early as 1978, they went out to hundreds of users rather than the hundreds of thousands that […]

Botnets: Does Size Matter?

Monday, March 18, 2013 by Andrew Conway

Every so often the command and control servers for a botnet get taken down, and we are told breathlessly by the more extravagant security experts that this botnet was responsible for a quarter (or a half or a third) or all the world’s spam, and that we can expect to see a big reduction in […]

Stopping Email Abuse in IPv6 Networks

Tuesday, June 05, 2012 by Kevin San Diego

Many service providers, network providers, and corporations plan to launch additional IPv6 networks and on-line services during this year’s World IPv6 Day, which falls on June 6th, 2012. IPv6 promises to enable deployment of a seemingly endless number of networks and devices.  IPv6 provides 128-bits of addressable space, while IPv4 only provides 32-bits.  This means […]

Who is working on WHOIS?

Monday, March 19, 2012 by Murray Kucherawy

ICANN met last week in Costa Rica, and the IETF meets next week in Paris. The one big thing these two meetings have in common is a nascent but significant push to replace the venerable WHOIS protocol, which lets one query a registry for information about the assignee of a network or the owner of […]

DKIM Helps and Hurts Google, YouTube and SalesForce

Thursday, January 26, 2012 by Murray Kucherawy

Google has been using DKIM to improve trust in mail it sends from several of its properties for some time now. Mail from Google staffers ( and, from YouTube (, from Google Groups ( and from Gmail users ( is always signed by DKIM using those respective domains as the signer. This means we […]

Highlights from IETF 82 in Taipei

Tuesday, November 29, 2011 by Murray Kucherawy

The Internet Engineering Task Force met in Taipei in mid-November. Cloudmark was in attendance, working to advance several things through the IETF processes, including a new working group that will produce protocols and advice documents relevant to reputation services (see my previous posts about DKIM and domain reputation); creation of a working group seeking advancement […]

Can Legal Action Stop Cybercrime?

Thursday, July 28, 2011 by David Romerstein

The Brookings Institute this week released a policy paper postulating the use of legal action to stop the spread of cybercrime. The author, Wired Magazine’s Noah Shachtman, speculates that new pressure from the US government on businesses to report data breaches combined with additional requirements for ISPs to be accountable for the things that happen […]

Exciting Times

Tuesday, July 19, 2011 by Murray Kucherawy

The Internet Engineering Task Force (IETF) will be meeting next week in Quebec City. The IETF, which produces the RFC document series that defines Internet standards, hosts a lot of activity that is of current interest to the messaging security community. Cloudmark is a very active participant in these processes, as a means of staying […]

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