This is a bad security argument. With OTR &#x2F; FS in general, you can re-encrypt the plaintext using a different local-only key after decrypting the forward-secure ciphertext. Then, the ciphertext that was sent <i>over the wire</i> is still forward-secure, and your adversary must seize your computer in order to try to decrypt the re-encrypted non-FS ciphertext you use for logs&#x2F;archiving.<p>There really is <i></i>no reason<i></i> to use non-FS encryption over FS encryption for ciphertext <i>sent over the wire</i>.