InfoUnlock.py

# for http://www.reddit.com/r/codes/comments/3874s7/crack_this_old_code_for_shiny_gold/
# this is from source to InfoLock 5.5, http://sourceforge.net/projects/infolock
encoder_ring = {
  'a': 8, 'b': 2, 'c': 3, 'd': 4, 'e': 7, 'f': 19, 'g': 5, 'h': 1, 'i': 9,
  'j': 10, 'k': 29, 'l': 12, 'm': 24, 'n': 14, 'o': 15, 'p': 16, 'q': 25, 
  'r': 18, 's': 6, 't': 20, 'u': 21, 'v': 22, 'w': 23, 'x': 13, 'y': 17,
  'z': 26, '!': 11, '?': 30, 'A': 31, 'B': 32, 'C': 33, 'D': 34, 'E': 35,
  'F': 36, 'G': 37, 'H': 38, 'I': 39, 'J': 40, 'K': 41, 'L': 42, 'M': 43,
  'N': 44, 'O': 45, 'P': 46, 'Q': 47, 'R': 48, 'S': 49, 'T': 50, 'U': 51,
  'V': 52, 'W': 53, 'X': 54, 'Y': 55, 'Z': 56, ',': 57, '\'': 58, ':': 59,
  '1': 60, '2': 61, '3': 62, '4': 63, '5': 64, '6': 65, '7': 66, '8': 67,
  '9': 68, '0': 69, '<': 70, '>': 71, '/': 72, ';': 73, '@': 74,
  '=': 27, '.': 28,
}

inv_encoder_ring = { v: k for k, v in encoder_ring.iteritems() }
inv_encoder_ring[27] = " "

passphrase = 'winstonn'
ciphertext = 'JnECqmFulkoxQyutMFMozuutlrKiEFzrlpFxHLvtVFCuHL'

plaintext = ''
for i, c in enumerate(ciphertext):
  k = passphrase[i % len(passphrase)]
  j = i / len(passphrase)
  
  digr = encoder_ring.get(c, 0)
  kdigr = encoder_ring.get(k, 0)
  lr = digr - kdigr
  
  plaintext += inv_encoder_ring.get(lr, '?')

print plaintext