diff --git a/EmployeeDirectory/Extensions/URL.swift b/EmployeeDirectory/Extensions/URL.swift
new file mode 100644
index 0000000..e146d27
--- /dev/null
+++ b/EmployeeDirectory/Extensions/URL.swift
@@ -0,0 +1,16 @@
+//
+//  URL.swift
+//  EmployeeDirectory
+//
+//  Created by Matt Bruce on 1/20/25.
+//
+import Foundation
+import CryptoKit
+
+extension URL {
+    internal var uniqueIdentifier: String {
+        let data = Data(absoluteString.utf8)
+        let hash = SHA256.hash(data: data)
+        return hash.compactMap { String(format: "%02x", $0) }.joined()
+    }
+}
diff --git a/EmployeeDirectory/Services/ImageCacheService.swift b/EmployeeDirectory/Services/ImageCacheService.swift
index b28b3c3..ba45f2a 100644
--- a/EmployeeDirectory/Services/ImageCacheService.swift
+++ b/EmployeeDirectory/Services/ImageCacheService.swift
@@ -20,7 +20,7 @@ public class ImageCacheService {
     public init() {}
 
     public func loadImage(from url: URL) async -> UIImage? {
-        let uniqueKey = String(url.absoluteString.hashValue)
+        let uniqueKey = url.uniqueIdentifier
         let cacheKey = uniqueKey as NSString
     
         if let cachedImage = memoryCache.object(forKey: cacheKey) {