I got a card with a text from a software company, and it tells me to decode it.
The only thing written on the card is the following code:


Might be Java related

  • 1
    $\begingroup$ Is there any story or background information available for this riddle? Might be needed to solve it. In what way exactly might it be related to Java? $\endgroup$ – The Dark Truth Oct 28 '15 at 13:56
  • $\begingroup$ Sorry, no more information is known $\endgroup$ – Mazz Oct 28 '15 at 13:59
  • $\begingroup$ This probably came from StackOverflow $\endgroup$ – Engineer Toast Oct 28 '15 at 14:00

The string is base 64 encoded, decoding gives:


The string /dpn gives a further clue how it needs to be deciphered; if you take the previous character in the ASCII table you get .com. Substituting each letter with the previous letter in the ASCII table gives the following email address. I have replaced @ with (at) to avoid email scrapers abusing this address.

  • $\begingroup$ @Gamow, how did you get the correct decoding? I also got the wrong decoding that first was given $\endgroup$ – Ivo Beckers Oct 28 '15 at 14:09
  • $\begingroup$ @Ivo: I used the tool at base64decode.org $\endgroup$ – Gamow Oct 28 '15 at 14:10
  • 1
    $\begingroup$ ...so... I know that it's just answering the question, but maybe the email address should be obscured in some way so crawlers don't eat it? $\endgroup$ – Ian MacDonald Oct 28 '15 at 16:02
  • 1
    $\begingroup$ I have replace (at) with @ to stop email scrapers $\endgroup$ – Alex Oct 28 '15 at 16:08
  • $\begingroup$ So does that mean the question is basically an ad for Dynatrace? $\endgroup$ – Engineer Toast Oct 28 '15 at 17:48

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.