A medical services provider is moving patient files to a new cloud repository. The compliance team states the contents must be scrambled so only authorized staff with a single shared secret can decode the information. Which method addresses this requirement?
Converting the files with a one-way hash algorithm referencing an external table
Generating temporary tokens for each new record to reduce the likelihood of deciphering later
Relying on a public credential for data placement and a private one for retrieval
Using a single key that authorized personnel share for data access
A single shared secret key is a symmetrical approach, which is an efficient method for protecting data at rest. Implementing it aligns with the compliance requirement because only parties possessing the shared secret can decipher stored records. Other approaches either rely on multiple keys, generate short-term credentials with additional complexity, or use methods like hashing or tokenization that do not always provide reversible data protection in the same manner.
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