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Ask HN: Which 2 way encryption method is this?

by Syama on 10/1/09, 3:18 AM with 2 comments

• by mbrubeck on 10/1/09, 9:28 AM

  Whatever it is, the encrypted version is Base64-encoded. Here's a hexdump without the Base64 encoding.

      00000000  29 67 02 94 c3 c7 1a c1  d6 cb aa 3c 55 5d 7f d8  |)g.........<U]..|
      00000010  8d f3 bf ca 44 36 a7 ee  8f 06 f7 3c 51 c6 f2 c5  |....D6.....<Q...|
  

  The decoded ciphertext is 32 bytes (256 bits), while the plaintext is 16 bytes (128 bits). I think this suggests a 256-bit block cipher. (Or maybe 128-bit block, especially if the input included a trailing newline or something?) That doesn't narrow it down all that much, and if you don't have the key I'm not sure it's possible to narrow it down any further.

• by bdfh42 on 10/1/09, 7:12 AM

  If it is encrypted then you will need to include the key - or do you think this is a hash?