With EnCase 7, how many hash libraries can be applied at one time to any case?

In EnCase 7, you can apply multiple hash libraries to a case, but the software specifically allows for the simultaneous use of two hash libraries at once. This dual application facilitates the comparison of hash values against known datasets, which is essential for the verification of data integrity and the identification of known files, such as those associated with malware or forensic artifacts.

The design of EnCase allows forensic examiners to enhance their analysis by cross-referencing files with different hash libraries, optimizing their investigative capabilities without overwhelming the system with too many comparisons. This ensures both efficiency in processing and effectiveness in identifying anomalies in the data being examined. Other options imply a restriction or misunderstanding of the software's capabilities, as it is designed to handle two libraries concurrently to effectively assist forensic investigations.