Make Encrypted String Same Length As Input String?

Nov 24, 2010

I have a 15 digit string to encrypt.

I have tried using .NET's various encryption functions but all my encrypted strings are at least 24, 28 or 32 in length.

I have heard of CipherMode.CTS with Padding = None that produces the same length output as the input length but I can't seem to get the same result. I have toyed with the block-size, key-size and salt size.

I don't mind adding a digit to my input string to make it 16 in length.

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