After catching up with an interesting, though not dramatic, week of security news, Steve and Leo examine the practical size of randomness and the challenge of collecting entropy in a client that may not have any built-in support for providing it, and may also be surrounded by active attackers.

Before plowing into 10 questions from our listeners, Leo and I discuss Microsoft's Second Tuesday patches, the CA Security Council's reaction to Chrome's CRLSet revocation revelations, an horrific appeal decision in Oracle v. Google, the forthcoming "Halt and Catch Fire" series, and more.

After catching up with the week's security events, Leo and I continue and complete our examination of the history and present operation of security certificate revocation. With last week's theory behind us, this week we examine the current practice and implementation of certificate revocation.

After catching up with the week's security events, Leo and I examine the history and operation of security certificate revocation and attempt to answer the question: What do we do when good certificates go bad?

Leo and I discuss the week's major security events and discuss questions and comments from listeners of previous episodes. We tie up loose ends, explore a wide range of topics that are too small to fill their own episode, clarify any confusion from previous installments, and present real world ‘application notes’ for any of the security technologies and issues we have previously discussed.

Not surprisingly, the previous week consisted of nearly a single story: Heartbleed. It was only "nearly," though, because we also received the results from the first phase of the TrueCrypt audit. So this week Leo and I discuss these two topics in detail.

Leo and I discuss this long-anticipated, final "Second Tuesday of the Month" patch update for Windows XP - which has finally arrived. We share a bunch of interesting miscellany, then take a very deep dive to examine and understand the technology, events and implications of yesterday's (April 7, 2014) discovery of a two-year-old critical buffer overrun bug in the open source industry's OpenSSL protocol package. It's been named "Heartbleed" because it abuses the new TLS "heartbeat" extension to bleed the server of critical security information.

Leo and I discuss the week's major security events and discuss questions and comments from listeners of previous episodes. We tie up loose ends, explore a wide range of topics that are too small to fill their own episode, clarify any confusion from previous installments, and present real world ‘application notes’ for any of the security technologies and issues we have previously discussed.

On the heels of Apple's major update to their iOS Security whitepaper, Steve and Leo catch up with the week's top security news - one IMPORTANT Microsoft Zero-Day Fixit, but otherwise largely debunking a bunch of hysterical headlines and "news" stories. Then they FINALLY conclude what has become the three-part series describing the security of iOS v7. Unfortunately, this week the news is less good.

On the heels of Apple's major update to their iOS Security whitepaper, Leo and I catch up with the week's top security news, including coverage of the interesting discoveries from the past week's 14th annual CanSecWest and Pwn2Own hacking competitions. Then, having come up for breath after last week's Part 1 episode, we take a second deep dive into everything we have learned about the inner workings of iOS. Most is good news, but there's one bit that's VERY troubling.