SDL Episode38

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Secure Digital Life #38

Recorded on October 24, 2017 from Wild West Hackin' Fest in Deadwood, South Dakota!

Episode Audio

Coming soon!


  • Doug White
    Cybersecurity professor, President of Secure Technology, and Security Weekly network host.
  • Russell Beauchemin
    Cybersecurity & Network Security Program Advisor and Director of Instructional Support & Learning Innovation at Roger Williams University.
  • What is Encryption?

    What is encryption anyway?

    We are AT Wild West Hackin Fest.

    Providence Hack Con wrap up

    Ciphers like Caesar ciphers, Vigenere Grid ciphers (wizy wheel invented by our own Jeff Man in "the pit")

    What is Symmetric Encryption? Out of Band key exchange Same key used to encipher and decipher One Time pads involve the use of ciphers that are exchanged in advance -- book ciphers -- crypto pads

    What is asymetric encryption? The use of a mathematical algorithm to create a one way function. A public key is used to encipher the private key is used to decipher In theory, the process is very difficult to crack

    So, how does asymetric encryption get broken? The most common reason is a failure at some point in the application rather than the algoritim itself Compromise of the private key

    All that said, how is crypto broken? True breaks can involve mathematic prediction to determine frequencies of occurance of certain things in the language Trying many different combinations can result in guessing the cipher

    So, can all crypto be broken? Theoretically anyway but the number of possible permutations and the uniformity of the distribution of letters creates a situation where it could simply take too long.

    Rapid shifts If keys can be continually generated and exchanged rapidly, any given crack has a limited life expectancy

    Entropy Is used to generate "random" keys