diff --git a/checksums.txt b/checksums.txt
index f60c940c..6fbddc41 100644
--- a/checksums.txt
+++ b/checksums.txt
@@ -1,3 +1,8 @@
+16.04.4.2 ISO image
+md5sum b9c3908c1613f0ca92248810ba7c7b66
+sha1sum 4f9758144b27d965e7e7a759a8203aa684508957
+sha256sum 73d5cc3d6f97e7fc7186c7cd07ebb22bae809be1f5167636f93a3f938c4de1e5
+
 16.04.4.1 ISO image
 md5sum 7427c70d65cb625e1d13a1044fe7a805
 sha1sum 02702c92dc07a9d2f8f54efc11962e921b2a7f48
diff --git a/sigs/securityonion-16.04.4.2.iso.sig b/sigs/securityonion-16.04.4.2.iso.sig
new file mode 100644
index 00000000..96ec604c
Binary files /dev/null and b/sigs/securityonion-16.04.4.2.iso.sig differ
diff --git a/testing/Verify_ISO_16.04.4.2.md b/testing/Verify_ISO_16.04.4.2.md
new file mode 100644
index 00000000..aaacfec8
--- /dev/null
+++ b/testing/Verify_ISO_16.04.4.2.md
@@ -0,0 +1,51 @@
+### 16.04.4.2 ISO image built on 2018/06/15
+
+### Download and Verify
+
+16.04.4.2 ISO image:  
+https://github.com/Security-Onion-Solutions/security-onion/releases/download/v16.04.4.2_20180615/securityonion-16.04.4.2.iso
+
+Signature for ISO image:  
+https://github.com/Security-Onion-Solutions/security-onion/raw/master/sigs/securityonion-16.04.4.2.iso.sig  
+
+Signing key:  
+https://raw.githubusercontent.com/Security-Onion-Solutions/security-onion/master/KEYS  
+
+For example, here are the steps you can use on most Linux distributions to download and verify our Security Onion ISO image.
+
+Download the signing key:  
+```
+wget https://raw.githubusercontent.com/Security-Onion-Solutions/security-onion/master/KEYS
+```
+
+Import the signing key:  
+```
+gpg --import KEYS
+```
+
+Download the signature file for the ISO:  
+```
+wget https://github.com/Security-Onion-Solutions/security-onion/raw/master/sigs/securityonion-16.04.4.2.iso.sig
+```
+
+Download the ISO image:  
+```
+wget https://github.com/Security-Onion-Solutions/security-onion/releases/download/v16.04.4.2_20180615/securityonion-16.04.4.2.iso
+```
+
+Verify the downloaded ISO image using the signature file:  
+```
+gpg --verify securityonion-16.04.4.2.iso.sig securityonion-16.04.4.2.iso
+```
+
+The output should show "Good signature" and the Primary key fingerprint should match what's shown below:
+```
+gpg: Signature made Tue 19 Jun 2018 03:10:02 PM EDT using RSA key ID ED6CF680
+gpg: Good signature from "Doug Burks <doug.burks@gmail.com>"
+gpg: WARNING: This key is not certified with a trusted signature!
+gpg:          There is no indication that the signature belongs to the owner.
+Primary key fingerprint: BD56 2813 E345 A068 5FBB  91D3 788F 62F8 ED6C F680
+```
+
+Once you've verified the ISO image, you're ready to proceed to our Installation guide:  
+https://github.com/Security-Onion-Solutions/security-onion/wiki/Installation