Use NSCache instead of dictionary is good idea for sensitive data?

Using Swift
1

I have to store sensitive data in the dictionary but they are really expensive to create, I like to free up memory when I don't need them, is it a good idea to use NSCache instead of Dictionary?

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What do you mean by “sensitive” here? Sensitive from a security perspective? Or something else?

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Quinn “The Eskimo!” @ DTS @ Apple

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