diff --git a/book/source/03-cryptography.md b/book/source/03-cryptography.md
index 3fd7a3b..b10d29a 100644
--- a/book/source/03-cryptography.md
+++ b/book/source/03-cryptography.md
@@ -63,7 +63,7 @@ Where symmetric keys are used in OpenPGP for data encryption, they are called ei
 
 In OpenPGP version 6, AEAD replaced the MDC[^MDC] mechanism to address malleability. In earlier OpenPGP versions, malicious alterations to ciphertext might go unnoticed. AEAD guards against such undetected changes.
 
-[^MDC]: In OpenPGP version 4, a mechanism called MDC (Modification Detection Code) was introduced to serve a comparable purpose as AEAD. While MDC is a non-standard mechanism, as of this writing, there are no known attacks against the scheme.
+[^MDC]: OpenPGP version 4 introduced a mechanism called MDC (Modification Detection Code), which fulfills a comparable purpose as AEAD in safeguarding message integrity. MDC is a non-standard mechanism, but no known attacks have compromised this scheme as of this document's last update.
 
 By addressing the malleability problem, AEAD also counters a variation of the EFAIL[^efail] attack.