diff --git a/pywidevine/cdm.py b/pywidevine/cdm.py
index ce1700f..e493ebc 100644
--- a/pywidevine/cdm.py
+++ b/pywidevine/cdm.py
@@ -35,17 +35,30 @@ class Cdm:
     urn = f"urn:uuid:{uuid}"
     key_format = urn
     service_certificate_challenge = b"\x08\x04"
-    common_privacy_cert = ("CAUSxwUKwQIIAxIQFwW5F8wSBIaLBjM6L3cqjBiCtIKSBSKOAjCCAQoCggEBAJntWzsyfateJO/DtiqVtZhSCtW8y"
-                           "zdQPgZFuBTYdrjfQFEEQa2M462xG7iMTnJaXkqeB5UpHVhYQCOn4a8OOKkSeTkwCGELbxWMh4x+Ib/7/up34QGeHl"
-                           "eB6KRfRiY9FOYOgFioYHrc4E+shFexN6jWfM3rM3BdmDoh+07svUoQykdJDKR+ql1DghjduvHK3jOS8T1v+2RC/TH"
-                           "hv0CwxgTRxLpMlSCkv5fuvWCSmvzu9Vu69WTi0Ods18Vcc6CCuZYSC4NZ7c4kcHCCaA1vZ8bYLErF8xNEkKdO7Dev"
-                           "Sy8BDFnoKEPiWC8La59dsPxebt9k+9MItHEbzxJQAZyfWgkCAwEAAToUbGljZW5zZS53aWRldmluZS5jb20SgAOuN"
-                           "HMUtag1KX8nE4j7e7jLUnfSSYI83dHaMLkzOVEes8y96gS5RLknwSE0bv296snUE5F+bsF2oQQ4RgpQO8GVK5uk5M"
-                           "4PxL/CCpgIqq9L/NGcHc/N9XTMrCjRtBBBbPneiAQwHL2zNMr80NQJeEI6ZC5UYT3wr8+WykqSSdhV5Cs6cD7xdn9"
-                           "qm9Nta/gr52u/DLpP3lnSq8x2/rZCR7hcQx+8pSJmthn8NpeVQ/ypy727+voOGlXnVaPHvOZV+WRvWCq5z3CqCLl5"
-                           "+Gf2Ogsrf9s2LFvE7NVV2FvKqcWTw4PIV9Sdqrd+QLeFHd/SSZiAjjWyWOddeOrAyhb3BHMEwg2T7eTo/xxvF+YkP"
-                           "j89qPwXCYcOxF+6gjomPwzvofcJOxkJkoMmMzcFBDopvab5tDQsyN9UPLGhGC98X/8z8QSQ+spbJTYLdgFenFoGq4"
-                           "7gLwDS6NWYYQSqzE3Udf2W7pzk4ybyG4PHBYV3s4cyzdq8amvtE/sNSdOKReuHpfQ=")
+    common_privacy_cert = (
+        # Used by Google's production license server (license.google.com)
+        # Not publicly accessible directly, but a lot of services have their own gateways to it
+        "CAUSxwUKwQIIAxIQFwW5F8wSBIaLBjM6L3cqjBiCtIKSBSKOAjCCAQoCggEBAJntWzsyfateJO/DtiqVtZhSCtW8yzdQPgZFuBTYdrjfQFEE"
+        "Qa2M462xG7iMTnJaXkqeB5UpHVhYQCOn4a8OOKkSeTkwCGELbxWMh4x+Ib/7/up34QGeHleB6KRfRiY9FOYOgFioYHrc4E+shFexN6jWfM3r"
+        "M3BdmDoh+07svUoQykdJDKR+ql1DghjduvHK3jOS8T1v+2RC/THhv0CwxgTRxLpMlSCkv5fuvWCSmvzu9Vu69WTi0Ods18Vcc6CCuZYSC4NZ"
+        "7c4kcHCCaA1vZ8bYLErF8xNEkKdO7DevSy8BDFnoKEPiWC8La59dsPxebt9k+9MItHEbzxJQAZyfWgkCAwEAAToUbGljZW5zZS53aWRldmlu"
+        "ZS5jb20SgAOuNHMUtag1KX8nE4j7e7jLUnfSSYI83dHaMLkzOVEes8y96gS5RLknwSE0bv296snUE5F+bsF2oQQ4RgpQO8GVK5uk5M4PxL/C"
+        "CpgIqq9L/NGcHc/N9XTMrCjRtBBBbPneiAQwHL2zNMr80NQJeEI6ZC5UYT3wr8+WykqSSdhV5Cs6cD7xdn9qm9Nta/gr52u/DLpP3lnSq8x2"
+        "/rZCR7hcQx+8pSJmthn8NpeVQ/ypy727+voOGlXnVaPHvOZV+WRvWCq5z3CqCLl5+Gf2Ogsrf9s2LFvE7NVV2FvKqcWTw4PIV9Sdqrd+QLeF"
+        "Hd/SSZiAjjWyWOddeOrAyhb3BHMEwg2T7eTo/xxvF+YkPj89qPwXCYcOxF+6gjomPwzvofcJOxkJkoMmMzcFBDopvab5tDQsyN9UPLGhGC98"
+        "X/8z8QSQ+spbJTYLdgFenFoGq47gLwDS6NWYYQSqzE3Udf2W7pzk4ybyG4PHBYV3s4cyzdq8amvtE/sNSdOKReuHpfQ=")
+    staging_privacy_cert = (
+        # Used by Google's staging license server (staging.google.com)
+        # This can be publicly accessed without authentication using https://cwip-shaka-proxy.appspot.com/no_auth
+        "CAUSxQUKvwIIAxIQKHA0VMAI9jYYredEPbbEyBiL5/mQBSKOAjCCAQoCggEBALUhErjQXQI/zF2V4sJRwcZJtBd82NK+7zVbsGdD3mYePSq8"
+        "MYK3mUbVX9wI3+lUB4FemmJ0syKix/XgZ7tfCsB6idRa6pSyUW8HW2bvgR0NJuG5priU8rmFeWKqFxxPZmMNPkxgJxiJf14e+baq9a1Nuip+"
+        "FBdt8TSh0xhbWiGKwFpMQfCB7/+Ao6BAxQsJu8dA7tzY8U1nWpGYD5LKfdxkagatrVEB90oOSYzAHwBTK6wheFC9kF6QkjZWt9/v70JIZ2fz"
+        "PvYoPU9CVKtyWJOQvuVYCPHWaAgNRdiTwryi901goMDQoJk87wFgRwMzTDY4E5SGvJ2vJP1noH+a2UMCAwEAAToSc3RhZ2luZy5nb29nbGUu"
+        "Y29tEoADmD4wNSZ19AunFfwkm9rl1KxySaJmZSHkNlVzlSlyH/iA4KrvxeJ7yYDa6tq/P8OG0ISgLIJTeEjMdT/0l7ARp9qXeIoA4qprhM19"
+        "ccB6SOv2FgLMpaPzIDCnKVww2pFbkdwYubyVk7jei7UPDe3BKTi46eA5zd4Y+oLoG7AyYw/pVdhaVmzhVDAL9tTBvRJpZjVrKH1lexjOY9Dv"
+        "1F/FJp6X6rEctWPlVkOyb/SfEJwhAa/K81uDLyiPDZ1Flg4lnoX7XSTb0s+Cdkxd2b9yfvvpyGH4aTIfat4YkF9Nkvmm2mU224R1hx0WjocL"
+        "sjA89wxul4TJPS3oRa2CYr5+DU4uSgdZzvgtEJ0lksckKfjAF0K64rPeytvDPD5fS69eFuy3Tq26/LfGcF96njtvOUA4P5xRFtICogySKe6W"
+        "nCUZcYMDtQ0BMMM1LgawFNg4VA+KDCJ8ABHg9bOOTimO0sswHrRWSWX1XF15dXolCk65yEqz5lOfa2/fVomeopkU")
     root_signed_cert = SignedDrmCertificate()
     root_signed_cert.ParseFromString(base64.b64decode(
         "CpwDCAASAQAY3ZSIiwUijgMwggGKAoIBgQC0/jnDZZAD2zwRlwnoaM3yw16b8udNI7EQ24dl39z7nzWgVwNTTPZtNX2meNuzNtI/nECplSZy"