Cryptography Session 1
Networking Fundamentals Session 2
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Examples

  • RC4 was introduced in 1987 and its algorithm was a trade secret. In 1994, a description of
    its algorithm was anonymously posted in a mailing group. http://en.wikipedia.org/wiki/RC4

 

  • MIFARE Classic is a contactless smartcard that was widely used in Europe. It used a set of
    proprietary protocols/algorithms. However, they were reverse-engineered in 2007. It
    turned out that the encryption algorithms were weak (using only 48bits) and thus
    breakable. (new version employs stronger crypto. Surprisingly, the vulnerable old version
    still in use, likely in your wallet right now)
    http://en.wikipedia.org/wiki/MIFARE

 

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