Doubling the key length increases the number of possible keys by approximately double.

Name: Doubling the key length increases the number of possible keys by approximately double.
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Doubling the key length in a cryptographic algorithm exponentially increases the number of possible keys, not just doubles it. For example, if a key is 1 bit long, there are 2 possible keys. If the key length is doubled to 2 bits, there are 4 possible keys, demonstrating an exponential increase.

Doubling the Key Length Increases the Number of Possible Keys