[Cryptography] Question about Bitcoin's security model

[John Levine]

It appears that  <alejandromontana at tutamail.com> said:
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>Jul 28, 2026 at 22:55 by johnl at iecc.com:
>
>> It appears that Alejandro Montana via cryptography <alejandromontana at tutamail.com> said:
>> >What is your definition of a truly anonymous currency?
>>
>> Coins without serial numbers.
>>
>> For the avoidance of doubt, I mean the kind that jingle in your pocket, not some software thing.

>In your opinion, there can't really be a digital anonymous currency?

I honestly don't know. It depends on your security model, and how
careful you are about all the metadata that can go with digital
transactions. As I expect we all know, bad opsec can 0compromise
theoretically secure cryptography. 

On the other hand, if I find a sack of dollar coins somewhere, unless
someone has deliberately tagged them with some sort of chemical or
biological tracer, they're totally fungible.

R's,
John