1) Key escrow is independent of cipher. You can (if you were foolish enough) do it with anything. At one time Skipjack was mentioned in the same sentence as key escrow, but there's no reason it should be.
2) No. Your question suggests you're about 5 years out of date as far as the state of US export regulation goes.
No proofs of security exist for any cipher other than one time pad. So it's not surprising you found none for Rijndael. It's beyond the state of the art to do so.
"British English" isn't silly at all. It identifies the dialect of English used in Britain. That's just as meaningful as "American English" or "Australian English".
In the same fashion, one could speak of "Belgian Dutch" -- though that is not normally done, people speak of Flemish instead. That's what it is, though.
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1) Key escrow is independent of cipher. You can (if you were foolish enough) do it with anything. At one time Skipjack was mentioned in the same sentence as key escrow, but there's no reason it should be. 2) No. Your question suggests you're about 5 years out of date as far as the state of US export regulation goes.
No proofs of security exist for any cipher other than one time pad. So it's not surprising you found none for Rijndael. It's beyond the state of the art to do so.
"British English" isn't silly at all. It identifies the dialect of English used in Britain. That's just as meaningful as "American English" or "Australian English". In the same fashion, one could speak of "Belgian Dutch" -- though that is not normally done, people speak of Flemish instead. That's what it is, though.