Triple DES (3DES) increases security by applying DES how many times?

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Multiple Choice

Triple DES (3DES) increases security by applying DES how many times?

Explanation:
Triple DES strengthens DES by performing the DES operation three separate times on the data. In practice, the data is encrypted with a first key, decrypted with a second key, and then encrypted again with a third key (an EDE sequence). Using three keys (or two keys in a common variant) greatly raises the effective key length, making brute-force attacks far more difficult than a single DES operation. This is why the method uses DES three times rather than once, twice, or four times.

Triple DES strengthens DES by performing the DES operation three separate times on the data. In practice, the data is encrypted with a first key, decrypted with a second key, and then encrypted again with a third key (an EDE sequence). Using three keys (or two keys in a common variant) greatly raises the effective key length, making brute-force attacks far more difficult than a single DES operation. This is why the method uses DES three times rather than once, twice, or four times.

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