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Episode Markers
  • 00:31
     
    #Compute the majority function   
    Compute the majority function -- are there more zeros or ones?
  • 00:58
     
    #Convert to decimal   
    Convert to decimal
  • 01:10
     
    #2 position right shift   
    2 position right shift
  • 01:32
     
    #Sum the 3 shifted values   
    Sum the 3 shifted values -- look to see if it is odd or even.
  • 02:31
     
    #the choosing   
    Use the choosing to combine E, F, and G.
  • 03:39
     
    #Combine data   
    Combine data for first sum.
  • 03:52
     
    #first time the input data is used   
    The first time the input data is used.
  • 04:05
     
    #Another NSA constant   
    Another NSA constant
  • 04:57
     
    #Add the numbers in hexadecimal   
    Add the numbers in hexadecimal.
  • 07:07
     
    #Compute new E   
    Compute new E value.

Mining Bitcoin with pencil and paper

Bitcoins are mined using a cryptographic algorithm called SHA-256. This algorithm is simple enough to be done with pencil and paper, as I show in this video. Not surprisingly, this is a thoroughly impractical way to mine. One round of the algorithm takes 16 minutes, 45 seconds which works out to a hash rate of 0.67 hashes per day. For details, see http://righto.com/sha






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