Which of the following is an example of useful and sufficient data masking of the string "CCSP"? Response:

"XCSP" only changes one character, allowing most of the original string to remain visible and potentially guessable.

"PSCC" is merely a transposition (rearrangement) of the original characters, which can often be easily reversed to reveal the original value.

"TtLp" is an example of data masking where the original "CCSP" string is replaced with a completely different, obfuscated string that retains the original data type (alphabetic characters) but reveals no part of the original sequence or pattern, making it difficult to infer the original value.

"3X91" replaces the original alphabetic string with a mixed alphanumeric string, but a simple substitution cipher could potentially be used if this mapping is known, and it doesn't represent a common masking technique for sensitive text like "CCSP".