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Well i have downloaded some cryptographic algorithm. Do there are those I didn't understand so this is my question: What is polymorphic RC4 or Polymorphic xor encryption?

I heard this in malware encryption.

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closed as unclear what you're asking by CodesInChaos, e-sushi, DrLecter, yyyyyyy, poncho Jun 21 '15 at 20:07

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  • $\begingroup$ Can you elaborate on the context where you heard this? The closest thing I know is polymorphic malware. $\endgroup$ – CodesInChaos Jun 20 '15 at 19:34
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Perhaps you are referring to a polymorphic virus? This is a virus which consists of a decryption program along with the actual virus code which is encrypted. When the virus runs and subsequently spreads, it re-encrypts itself with a different key, thereby appearing to be different each time it propagates.

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  • $\begingroup$ +1 before the question closes. This however seems to be rather different than polymorphic encryption. $\endgroup$ – Maarten Bodewes Jun 21 '15 at 9:38

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