diff --git a/documentation/docs/README.md b/documentation/docs/README.md
index 38f80ac85..670eabfab 100644
--- a/documentation/docs/README.md
+++ b/documentation/docs/README.md
@@ -17,7 +17,7 @@ You may also add new `toctree` elements and new `index.md` file as needed.
 
 ### Inline images
 Images can be referenced with their URL in markdown, but this can delay their presentation in the page.
-Another option is to store the images in the [RTK collection](https://data.kitware.com/?#collection/5a7706878d777f0649e04776/folder/5eaeaa2f9014a6d84e47adb3) on data.kitware.com and to push their content file (SHA512) to the RTK source tree.
+Another option is to store the images in the [RTK collection](https://data.kitware.com/?#collection/5a7706878d777f0649e04776/folder/5eaeaa2f9014a6d84e47adb3) on data.kitware.com and to push their content file (CID) to the RTK source tree.
 Such images will be automatically downloaded when building the documentation and served as static files when navigating.
 To add a new image:
 1. Go to the [RTKDocumentationData](https://data.kitware.com/?#collection/5a7706878d777f0649e04776/folder/5eaeaa2f9014a6d84e47adb3) folder on data.kitware.com
diff --git a/documentation/docs/copy_and_fetch_sphinx_doc_files.cmake b/documentation/docs/copy_and_fetch_sphinx_doc_files.cmake
index 7ddb2aff1..9d0ef03ea 100644
--- a/documentation/docs/copy_and_fetch_sphinx_doc_files.cmake
+++ b/documentation/docs/copy_and_fetch_sphinx_doc_files.cmake
@@ -55,7 +55,7 @@ endforeach()
 if(POLICY CMP0009)
   cmake_policy(SET CMP0009 NEW)
 endif()
-set(link_content sha512)
+set(link_content cid)
 file(GLOB_RECURSE content_files "${RTK_DOC_OUTPUT_DIR}/*${link_content}")
 foreach(content_file ${content_files})
   file(
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index fb744596c..c586542dc 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -105,9 +105,9 @@ function(rtk_add_cuda_test testname testfile)
   endif()
 endfunction()
 
-# Use sha512 algorithm to generate content link
+# Use cid algorithm to generate content link
 if(NOT ITK_SOURCE_DIR)
-  set(ExternalData_LINK_CONTENT SHA512)
+  set(ExternalData_LINK_CONTENT CID)
 endif()
 
 rtk_add_test(rtkFDKTest rtkfdktest.cxx)
diff --git a/utilities/UploadTestData.py b/utilities/UploadTestData.py
index 58e653126..e1812ea73 100644
--- a/utilities/UploadTestData.py
+++ b/utilities/UploadTestData.py
@@ -44,7 +44,7 @@ def _uploadContentLinkItem(
         :param dryRun: Do not actually upload any content.
         """
         test_folder = os.path.normpath(test_folder)
-        name = os.path.splitext(content_link)[0]  # remove .sha512 extension
+        name = os.path.splitext(content_link)[0]  # remove .cid extension
 
         if dryRun:
             # create a dryRun placeholder
@@ -71,11 +71,11 @@ def _uploadContentLinkItem(
 
         content_link = os.path.join(workDir, content_link)
 
-        if os.path.isfile(content_link) and fnmatch.fnmatch(content_link, "*.sha512"):
+        if os.path.isfile(content_link) and fnmatch.fnmatch(content_link, "*.cid"):
             with open(content_link) as fp:
                 hash_value = fp.readline().strip()
 
-            content_file = os.path.join(workDir, ".ExternalData_SHA512_" + hash_value)
+            content_file = os.path.join(workDir, ".ExternalData_CID_" + hash_value)
             if os.path.isfile(content_file):
                 print("\n Found content file: " + content_file)
 
@@ -113,7 +113,7 @@ def main():
     parser.add_argument(
         "--content-link",
         required=True,
-        help="name of the content-link .sha512 file. (eg: Test.png.sha512)",
+        help="name of the content-link .cid file. (eg: Test.png.cid)",
     )
     parser.add_argument(
         "--test-folder",