user112577: On Bitcoin wiki several opcodes are listed as "disabled".
My question is simple: which Bitcoin improvement proposal proposed to disable them, and when they have effectively been disabled in the past?
I'm particularly interested in the OP_MOD arithmetic opcode.


user13866: It appears many unused opcodes were disabled in 2010 for security reasons (at least OP_CAT) or as a security precaution (many others).
Pseudonymous commented that the first BIPs didn't start until 2011 - a year later.

112577: <p>On <a href="https://en.bitcoin.it/wiki/Script" rel="nofollow noreferrer">Bitcoin wiki</a> several opcodes are listed as &quot;disabled&quot;.</p>
<p>My question is simple: which Bitcoin improvement proposal proposed to disable them, and when they have effectively been disabled in the past?</p>
<p>I'm particularly interested in the OP_MOD arithmetic opcode.</p>
<hr />
 13866: <p>It appears many unused opcodes were disabled in 2010 for security reasons (at least OP_CAT) or as a security precaution (many others).</p>
<p><a href="https://bitcoin.stackexchange.com/users/24925/pseudonymous">Pseudonymous</a> commented that the first BIPs didn't start until 2011 - a year later.</p>
