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MD5 is dead?



https://twitter.com/angealbertini/status/1074580347650756608

https://github.com/corkami/pocs/blob/master/collisions/README.md

Current status - as of December 2018 - of known attacks:

  • get a file to get another file's hash or a given hash: impossible

    • it's still even not practical with MD2.
    • works for simpler hashes(*)
  • get 2 different files with the same MD5: instant

    • examples: 1 & 2
  • make 2 arbitrary files get the same MD5: a few hours (72 hours.core)

    • examples: 1 & 2
  • make 2 arbitrary files of specific file formats (PNG, JPG, PE...) get the same MD5: instant

    • read below
  • get two different files with the same SHA1: 6500 years.core

    • get two different PDFs with the same SHA-1 to show a different picture: instant (the prefixes are already computed)
--
Kurt Seifried
kurt@seifried.org

Page Last Updated or Reviewed: December 28, 2018