Today's topic is related to security, specifically in the context of a Wi-Fi network. Transmissions that are broadcast wirelessly are very vulnerable to interception, and protection comes by encryption. But the earliest of the encryption techniques, Read More...

Today's PodSnack is about a cryptographic hashing function called Message Digest 5 (MD5). MD5 was developed in 1991 by Ronald Rivest, a professor at MIT. It was intended for use as a digital signature, and as a technique for verifying data integrity Read More...

Yesterday we talked about secret key cryptography (SKC) and we left an open issue: how do the two ends of a communication safely, securely, and dynamically exchange a key? After all, I don't want to have to call the webmaster for every site that I Read More...

We've talked in other PodSnacks about encryption . Today I thought we'd take a look at one way in which encryption can be used to provide a level of security: secret key cryptography (SKC). This is the technology that enables Internet banking, Read More...

New week, new city. This time I'm in Basking Ridge, NJ. Should be a fairly quiet week. The course is a basic overview of telecommunications, which is fun to teach and takes a lot less work to prepare for. We did security topics most of last week, Read More...

With our series on T-1 wrapped up, today we'll just put out a basic concept that is likely to feature prominently over the next few weeks. Our CEO asked every instructor in the company to create a few snacks for you, and a lot of the ones I have been Read More...