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DEFAULT_KEY = "\x03\x0f\x15\x13\x08\x16\x09\x06\x1c\x0a\x1a\x0d\x12\x02\x17"

def rc4(data, key=DEFAULT_KEY, skip=0):

x = 0

box = list(range(256))

x = 0

for i in list(range(256)):

x = (x + box[i] + ord(key[i % len(key)])) % 256

tmp = box[i]

tmp2 = box[x]

box[i] = box[x]

box[x] = tmp

x = 0

y = 0

out = []

if skip > 0:

for i in list(range(skip)):

x = (x + 1) % 256

y = (y + box[x]) % 256

box[x], box[y] = box[y], box[x]

for char in data:

x = (x + 1) % 256

y = (y + box[x]) % 256

box[x], box[y] = box[y], box[x]

k = box[(box[x] + box[y]) % 256]

out.append(chr(ord(char) ^ k))

return ''.join(out)

if __name__ == '__main__':

data = "\x24\xa3\x8a\x5a\xe7\x58\x82\x82\xf7\x2c\x44\xf1\x20\x67"

result = rc4(data, DEFAULT_KEY, 0)

print(result)

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