Original text:
11.3. <del> It is important to delete all security sensitive values S as soon as they, or another value derived from them, is used for encryption or decryption. </del>  <del> More precisely, the values application_[i]_[j]_key and application_[i]_[j]_nonce are said to be "consumed" if they were used either to: </del>  <del> encrypt or (successfully) decrypt a message or </del>  <del> if a key, nonce or secret derived from S has been consumed. (This goes both for values derived via Derive-Secret and HKDF-Expand- Label.) Here, S may be the init_secret, update_secret, epoch_secret, application_secret as well as any secret in the AS Tree or one of the ratchets. </del>  As soon as a group member consumes a value they MUST immediately delete (all representations of) that value.  This is crucial to Then, for that member, at least the following values have been consumed and MUST be deleted: <del> the init_secret, update_secret, epoch_secret, application_secret of that epoch, </del>  all node secrets in the AS Tree on the path from the root to the leaf with index i, the first j secrets in the i-th ratchet and <del> application_[i]_[j]_key and application_[i]_[j]_nonce. </del>  Concretely, suppose we have the following AS Tree and ratchet for participant D:

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Revised text:
11.3.  <ins> It is important to delete all security sensitive values as soon as they are _consumed_. A sensitive value S is said to be _consumed_ if </ins>  <ins> S was used to encrypt or (successfully) decrypt a message, or if </ins>  <ins> a key, nonce, or secret derived from S has been consumed.  (This goes for values derived via Derive-Secret as well as HKDF-Expand- Label.) </ins>  <ins> Here, S may be the "init_secret", "update_secret", "epoch_secret", "application_secret" as well as any secret in the AS Tree or one of the ratchets. </ins> As soon as a group member consumes a value they MUST immediately delete (all representations of) that value.  This is crucial to Then, for that member, at least the following values have been consumed and MUST be deleted:  <ins> the "init_secret", "update_secret", "epoch_secret", "application_secret" of that epoch, </ins> all node secrets in the AS Tree on the path from the root to the leaf with index i, the first j secrets in the i-th ratchet and  <ins> "application_[i]_[j]_key" and "application_[i]_[j]_nonce". </ins> Concretely, suppose we have the following AS Tree and ratchet for participant D: