Eric Escobar will be presenting on wireless hacking concepts and will go into details on the CypherCon 2.0 wireless capture the flag!
Presentations for Cryptography
Ed Abrams (zeroaltitude)
Demetrius Comes (cmdc0de)
cmdc0de and zeroaltitude will present an overview of the DEFCON DarkNet challenge, currently getting ready for its fifth year. This presentation will also give an inside look at the DarkNet hardware, software, badges, and quests done over the years.
DEFCON DarkNet has created a Daemon who controls the DarkNet; and players interact with it through the website at dcdark.net . The Daemon keeps track of player quests and their DarkNet inventory. DarkNet badges, once assembled as a learning quest, act as a valuable tool to identify your role as a player and to help you with certain quests. Physical puzzle items such as lockpick stations and phonebooths, as well as interactions with DarkNet Operatives, provide further avenues to engage players in their quests and learning experiences.
Cmdc0de and zeroaltitude will be presenting two ciphers at the end of their talk, and discussing a little bit of how they think about ciphers. They will then invite people to join them in the cipher village after their talk to work on these.
Experiences within the DarkNet will take you to the limit of your existing knowledge… and beyond. If you join us, we will send you on quests to improve your technical abilities. You will meet others like you and you will learn from each other and grow stronger. As you proceed within the DarkNet, you’ll discover hidden messages you would never have noticed and you’ll accomplish goals you never would have achieved alone. To succeed, you have to find your way through the quests and if you make it to the end, you will have proven yourself worthy to join us in our stand against those who seek to control us.
DarkNet’s mission is to secure a safe, independent and self-sustaining community free from intrusion and infiltration by those who would enslave us to their own ends. Our opponents are many and they grow ever more modern — spying on us through our information streams and controlling us through messages that we see wherever we go. We must resist.
The opportunities for exploit are many but with every new vulnerability has come a potential mitigation, all in an attempt to strong arm these sensitive operations into the browser, limit an applications liability, and keep us users happy.
Current schemes to protect user passwords like bcrypt, scrypt, and iterative hashing are insufficient to resist attacks when password digests are stolen. We present a modern cloud service, called Pythia, which protects passwords using a cryptographically keyed pseudorandom function (PRF). Unlike existing schemes like HMAC, Pythia permits key updates as a response to compromises. Key updates nullify stolen password digests, enable digests to be updated to the new key, and don’t require users to change their passwords. The keystone of Pythia is a new cryptographic construction called a partially-oblivious PRF that provides these new features.
Password auditing is more important than ever before. We take a deep dive into some password cracking tools you probably have never seen. Implementing a unified cluster interface allows you to complete password audits faster and gives collaborative teams access to information in real time. What about cracking unknown and obscure hashes? MDXfind covers a very wide array of hash algorithms and iterative hash types which can all be ran simultaneously. Come see how these tools work and how they can make your next password audit or penetration test a step above the rest.
The Internet and the telephone, once imagined to be profoundly democratizing, have evolved in ways that breathe new life into unchecked consumerism and authoritarian nationalism. A hope going back to the early cypherpunks is that cryptography might help — that its artful use might protect, restore, or expand democratic values threatened by technologies of surveillance and control. Is this hope remotely realistic? I offer no definitive answer, but will share my thoughts in this connection.