user47827: What is the difference between the anti-klepto protocol (also here) and Anti-Exfil? Is it the same thing just with different names or are there differences? It seems they are both addressing the nonce covert channel attack?

user11019: 
Is it the same thing just with different names [...]?

Yes.
This became known as "anti-klepto" initially (full disclosure: I suggested this name). Later, a decision at Blockstream was made to refer to the project as "anti-exfil", for the simple reason that the word "kleptography" is a very rare term that probably only cryptography experts have heard of (as opposed to "exfiltration", which is understandable to a wider audience).

47827: <p>What is the difference between the <a href="https://shiftcrypto.ch/blog/anti-klepto-explained-protection-against-leaking-private-keys/" rel="nofollow noreferrer">anti-klepto</a> protocol (also <a href="https://github.com/ElementsProject/secp256k1-zkp/blob/ed69ea79b429beae4260917e08fe60317d38ee8d/include/secp256k1_ecdsa_s2c.h#L100-L155" rel="nofollow noreferrer">here</a>) and <a href="https://medium.com/blockstream/anti-exfil-stopping-key-exfiltration-589f02facc2e" rel="nofollow noreferrer">Anti-Exfil</a>? Is it the same thing just with different names or are there differences? It seems they are both addressing the nonce covert channel attack?</p>
 11019: <blockquote>
<p>Is it the same thing just with different names [...]?</p>
</blockquote>
<p>Yes.</p>
<p>This became known as &quot;anti-klepto&quot; initially (full disclosure: I suggested this name). Later, a decision at Blockstream was made to refer to the project as &quot;anti-exfil&quot;, for the simple reason that the word &quot;<a href="https://en.wikipedia.org/wiki/Kleptography" rel="nofollow noreferrer">kleptography</a>&quot; is a very rare term that probably only cryptography experts have heard of (as opposed to &quot;exfiltration&quot;, which is understandable to a wider audience).</p>
