diff --git a/core-java-modules/core-java-security-3/README.md b/core-java-modules/core-java-security-3/README.md
index 8623fa5aa8..31969cd270 100644
--- a/core-java-modules/core-java-security-3/README.md
+++ b/core-java-modules/core-java-security-3/README.md
@@ -9,4 +9,5 @@ This module contains articles about core Java Security
 - [Initialization Vector for Encryption](https://www.baeldung.com/java-encryption-iv)
 - [HMAC in Java](https://www.baeldung.com/java-hmac)
 - [Generating a Secure AES Key in Java](https://www.baeldung.com/java-secure-aes-key)
+- [Computing an X509 Certificate’s Thumbprint in Java](https://www.baeldung.com/java-x509-certificate-thumbprint)
 - More articles: [[<-- prev]](/core-java-modules/core-java-security-2)