ReversingLabs Hashing Algorithm

Traditional hashing algorithms (e.g., MD5, SHA-1) provide an essential tool for security applications. Although commonly used for allowlisting and blocklisting, traditional hashes have significant drawbacks for detecting malware. First, a malicious file must be seen before a hash can be created so polymorphic attacks are not detectable. Second, hashes are fragile, enabling malware authors to make inconsequential changes to files to avoid detection.

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