- Spam Under Half of Email (PDF) — Symantec report: There is good news this month on the email-based front of the threat landscape. According to our metrics, the overall spam rate has dropped to 49.7%. This is the first time this rate has fallen below 50% of email for over a decade. The last time Symantec recorded a similar spam rate was clear back in September of 2003.
- Dropdowns Should be the UI of Last Resort (Luke Wroblewski) — Well-designed forms make use of the most appropriate input control for each question they ask. Sometimes that’s a stepper, a radio group, or even a dropdown menu. But because they are hard to navigate, hide options by default, don’t support hierarchies, and only enable selection not editing, dropdowns shouldn’t be the first UI control you reach for. In today’s software designs, they often are. So instead, consider other input controls first and save the dropdown as a last resort.
- Another Look at Provable Security — In our time, one of the dominant paradigms in cryptographic research goes by the name “provable security.” This is the notion that the best (or, some would say, the only) way to have confidence in the security of a cryptographic protocol is to have a mathematically rigorous theorem that establishes some sort of guarantee of security (defined in a suitable way) under certain conditions and given certain assumptions. The purpose of this website is to encourage the emergence of a more skeptical and less credulous attitude toward this notion and to contribute to a process of critical analysis of the positive and negative features of the “provable security” paradigm.
- Pig (github) — a Linux packet crafting tool. You can use Pig to test your IDS/IPS among other stuffs.
"open source" entries
Finding new ways to shrink disk space for storing partitionable data.
Register for the free webcast, “Extending Cassandra with Doradus OLAP for High Performance Analytics,” which will be held July 29 at 9 a.m. PT.
Engineers at Dell were developing customer apps when they found that the query response times their customers were demanding — something on the order of seconds (in other words, the need to scan millions of objects/second) — required a new type of query engine. This led them on a four-year journey to create Doradus, one of Dell Software Group’s first open-source projects.
Doradus is a server framework that runs on top of Cassandra. To build Doradus, the team borrowed from several well-accepted paradigms. They used traditional OLAP techniques to allow data to be arranged into static, multidimensional cubes. They leveraged the vertical orientation and efficient compression of columnar databases. And, from the NoSQL world, they employed sharding. The result: a storage and query engine called Doradus OLAP that stores data up to 1M objects/second/node, providing nearly real-time data warehousing. This architecture also allows for extreme compression of the data, sometimes producing up to a 99% reduction in space usage.
This extremely dense storage means that data that once took multiple nodes can now be stored on a single node, allowing for fast queries without the expense of a large cluster. Because Doradus is built on top of Cassandra, the option to scale out is still there. This allows for sharding and replication, and also takes advantage of Cassandra’s failover features. Read more…