(_Can_ one write a side-channel-free pure-Python function to xor two bytestrings?)
@nickm_tor what are the side channels in Python, particularly if you unroll the loop?
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@bascule Singleton characters and small integers are reference-counted. This leads to cache-timing issues. -
@nickm_tor oh fun. Was wondering if Ruby might have similar problems but it uses tagged pointers for integers.@JRuby though...
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