The inductive step here is in the conjecture: This algorithm is information-theoretic secure for a bitstring of length N The grantparent's argument is to firs

The inductive step here is in the conjecture: This algorithm is information-theoretic secure for a bitstring of length N The grantparent's argument is to first convince yourself that a) this is true for a bitstring of length 1, and b) if it's true for a bitstring of length N, then it's also true for a bitstring of length N+1 (or alternately formulated: if it's true for bitstrings of length M and N, you can concat them and it will be true for a bitstring of length M+N) The inductive step is then to apply this to show that because it's true for length 1, it's also true for length 2. And if it's true for length 2 then it's true for length 3. etc etc.