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I found a card of a company which must be several years old when cleaning my house. On this card, there is a riddle and I just can't figure it out. The code is the following:

k5aRhdGZ15HNz87JkZaR1Z6/m4aRnouNnpya0ZyQkg==

I am pretty sure it's something base64 encoded, however I can't decode it correctly. Do you guys have any idea?

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If you decode then

xor each byte with 255

you get an email

linz.f(n2016nin*a@dynatrace.com

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  • $\begingroup$ When I do that exact same thing, I get: 쩮ꮦ郞ﲰﱶ瑱ह⡣宣ﭿ, not no email. $\endgroup$ – garr890354839 Oct 24 '16 at 17:28
  • $\begingroup$ i get what Bob said. base64 decode, then...er... "apply logic" :) $\endgroup$ – Rubio Oct 24 '16 at 18:44

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