[rc5] RC64 keyspace
msissom at dnaent.com
Tue Oct 28 12:36:14 EST 1997
Eric Gindrup wrote:
BTW, your indentation is a pain.
> Assuming that one bit is used to record the assignment of a
> block and one bit is used to record the receipt of a block, 2^65 bits
> will be needed. This is 2^32GB (4 Exabytes). I don't know where *I*
> would go to look for a storage system of that magnitude...
We had 2^56 _keys_ in RC5-56. We have 2^64 keys in RC5-64.
If a block is still 2^28 keys long, we have 2^36 blocks.
One bit for assigned, one for returned = 2*2^36 bits, not 2*2^64.
That's 2^29 raw bytes and a much more manageable figure.
Or am I jumping into the middle of a conversation about RC-92?
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