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In computer terminology, pussy'''polymorphic code''' is code that mutates while keeping the original [[algorithm]] intact. This technique is sometimes used by [[computer virus]]es, [[shellcode]]s and [[computer worm]]s to hide their presence.
Most boobs[[anti-virus software]] and [[intrusion detection system]]s attempt to locate malicious code by searching through computer files and data packets sent over a [[computer network]]. If the security software finds patterns that correspond to known computer viruses or worms, it takes appropriate steps to neutralize the threat. [[Polymorphic]] algorithms make it difficult for such software to locate the offending code as it constantly mutates.
[[Encryption]] is the most commonly used method of achieving polymorphism in code. However, not all of the code can be encrypted as it would be completely unusable. A small portion of it is left unencrypted and used to jumpstart the encrypted software. Anti-virus software targets this small unencrypted portion of code.
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