[Cryptography] "Perpetual Encryption"
Allen
allenpmd at gmail.com
Tue Mar 28 21:56:00 EDT 2017
> I wonder, is this some variant of the idea of starting with a shared
> unpredictable one-time pad K1, and sending the encrypted message (xor K1
> M1) along with (xor K1 K2), where K2 is a new unpredictable one-time pad
> to use for the next encryption?
I think the scheme is closer to this:
Mi = sequence of message bits
Ri = sequence of random bits
Pi = sequence of bits from PRNG keyed by key K
The encoder transmits Mi xor Ri, and Ri xor Pi. The decoder generates
Pi and recovers
Mi = (Mi xor Ri) xor ((Ri xor Pi) xor Pi)
But its certainly not clear from the whitepaper.
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