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3. 100: SHA-1 is dead

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SHA-1 is dead

100 points

SHA-1 is dead

http://sha1.pwn.seccon.jp/

Upload two files satisfy following conditions:

  1. file1 != file2
  2. SHA1(file1) == SHA1(file2)
  3. 2017kb < sizeof(file1) < 2018kb
  4. 2017kb < sizeof(file2) < 2018kb

* 1kb = 1024 bytes

Answer:  

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