user136762: As an extension to this question and some quick searches on software crypto wallets - my understanding is that any newly generated key-pair is unique to a specific cryptocurrency.
Assuming this is correct, how is this realized? In other words, how is this restriction imposed?

user76567: Key pairs are not unique to a specific cryptocurrency but addresses are. You can have the same key pair but it will lead to different addresses in Bitcoin and Litecoin for example, one starting with bc1 and the other one starting with L

136762: <p>As an extension to <a href="https://bitcoin.stackexchange.com/questions/115323/are-all-wallets-always-considered-nodes/115324#115324">this question</a> and some quick searches on software crypto wallets - my understanding is that any newly generated key-pair is unique to a specific cryptocurrency.</p>
<p>Assuming this is correct, how is this realized? In other words, how is this restriction imposed?</p>
 76567: <p>Key pairs are not unique to a specific cryptocurrency but addresses are. You can have the same key pair but it will lead to different addresses in Bitcoin and Litecoin for example, one starting with <code>bc1</code> and the other one starting with <code>L</code></p>
