Question

We discussed the concept of masking in video lectures. What are the minimum number of basis transformations required in order to avoid masking for K
classes?

Answer 1

Explanation:

Note first however, that data masking is an IT industry term of art that usually refers in a generic way to any software function applied ito obfuscate, anonymize or otherwise de-identify sensitive or personally identifiable information (PII) in electronic data sources like these. These functions can apply to data at rest (static data masking), or to data in-transit (dynamic data masking).

For the purposes of this article and consistency with the definitions still used by some, we’ll refer to data masking here the subset functionality synonymous with data redaction or obfuscation via character replacement. In this context, masking characters are chosen to meet the requirements of a system designed to test or still work with the masked results. Masking ensures that vital parts of the PII string — like the fist 5 digits of a social security number — are obscured. And under this definition, the string-masked data is not recoverable....

hope it would be helpful

Answer 2

Answer:k-1 classes

Explanation: The minimum number transformation required is k-1 for k classes