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<div class="moz-cite-prefix">On 7/24/24 21:50, Seth David Schoen
wrote:<br>
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<blockquote type="cite" cite="mid:ZqHZo5TnjlM8mUuC@demorgan"><span
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<pre class="moz-quote-pre" wrap="">Is Merkle's conjecture actually literally correct, so far as we know?
That is, is there any public-key cryptosystem where the computational
work for an attacker, in the best known attack, is actually exponential?
(I assume that the encryption operation should be polynomial-time, so
not some algorithm where encryption is exponential-time and naive
decryption is also exponential-time, just with a bigger exponent.)
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<p>To be clear, are you asking about computational work for the
attacker as a factor of key size, or as a factor of the
computational work required to do encryption? The difference is
occasionally important. <br>
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<p>In either case I believe that attacks on elliptic-curve systems
are exponential, although the exponent is somewhat less than two.</p>
<p>Bear</p>
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