diff --git a/packager/app/test/testdata/bear-640x360-a-mp4-cenc-ad_cues-golden.m3u8 b/packager/app/test/testdata/bear-640x360-a-mp4-cenc-ad_cues-golden.m3u8
index 12f3f33190..7bf3defe68 100644
--- a/packager/app/test/testdata/bear-640x360-a-mp4-cenc-ad_cues-golden.m3u8
+++ b/packager/app/test/testdata/bear-640x360-a-mp4-cenc-ad_cues-golden.m3u8
@@ -4,7 +4,7 @@
 #EXT-X-TARGETDURATION:2
 #EXT-X-PLAYLIST-TYPE:VOD
 #EXT-X-MAP:URI="output_audio.mp4",BYTERANGE="967@0"
-#EXT-X-KEY:METHOD=SAMPLE-AES-CENC,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
+#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
 #EXTINF:0.998,
 #EXT-X-BYTERANGE:16279@1035
 output_audio.mp4
diff --git a/packager/app/test/testdata/bear-640x360-a-mp4-cenc-golden.m3u8 b/packager/app/test/testdata/bear-640x360-a-mp4-cenc-golden.m3u8
index ec19ad620b..a1b9dcb25b 100644
--- a/packager/app/test/testdata/bear-640x360-a-mp4-cenc-golden.m3u8
+++ b/packager/app/test/testdata/bear-640x360-a-mp4-cenc-golden.m3u8
@@ -4,7 +4,7 @@
 #EXT-X-TARGETDURATION:2
 #EXT-X-PLAYLIST-TYPE:VOD
 #EXT-X-MAP:URI="output_audio.mp4",BYTERANGE="967@0"
-#EXT-X-KEY:METHOD=SAMPLE-AES-CENC,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
+#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
 #EXTINF:0.998,
 #EXT-X-BYTERANGE:16279@1035
 output_audio.mp4
diff --git a/packager/app/test/testdata/bear-640x360-ec3-a-mp4-cenc-golden.m3u8 b/packager/app/test/testdata/bear-640x360-ec3-a-mp4-cenc-golden.m3u8
index 5fbfd3b795..031fab01da 100644
--- a/packager/app/test/testdata/bear-640x360-ec3-a-mp4-cenc-golden.m3u8
+++ b/packager/app/test/testdata/bear-640x360-ec3-a-mp4-cenc-golden.m3u8
@@ -4,7 +4,7 @@
 #EXT-X-TARGETDURATION:2
 #EXT-X-PLAYLIST-TYPE:VOD
 #EXT-X-MAP:URI="output_audio.mp4",BYTERANGE="909@0"
-#EXT-X-KEY:METHOD=SAMPLE-AES-CENC,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
+#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
 #EXTINF:1.010,
 #EXT-X-BYTERANGE:24460@977
 output_audio.mp4
diff --git a/packager/app/test/testdata/bear-640x360-ec3-v-mp4-cenc-golden.m3u8 b/packager/app/test/testdata/bear-640x360-ec3-v-mp4-cenc-golden.m3u8
index 291c18376f..cdf5fa0ee4 100644
--- a/packager/app/test/testdata/bear-640x360-ec3-v-mp4-cenc-golden.m3u8
+++ b/packager/app/test/testdata/bear-640x360-ec3-v-mp4-cenc-golden.m3u8
@@ -4,7 +4,7 @@
 #EXT-X-TARGETDURATION:2
 #EXT-X-PLAYLIST-TYPE:VOD
 #EXT-X-MAP:URI="output_video.mp4",BYTERANGE="1091@0"
-#EXT-X-KEY:METHOD=SAMPLE-AES-CENC,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
+#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
 #EXTINF:1.001,
 #EXT-X-BYTERANGE:93805@1159
 output_video.mp4
diff --git a/packager/app/test/testdata/bear-640x360-v-mp4-cenc-ad_cues-golden.m3u8 b/packager/app/test/testdata/bear-640x360-v-mp4-cenc-ad_cues-golden.m3u8
index 1efedb9889..99442c7fdd 100644
--- a/packager/app/test/testdata/bear-640x360-v-mp4-cenc-ad_cues-golden.m3u8
+++ b/packager/app/test/testdata/bear-640x360-v-mp4-cenc-ad_cues-golden.m3u8
@@ -4,7 +4,7 @@
 #EXT-X-TARGETDURATION:2
 #EXT-X-PLAYLIST-TYPE:VOD
 #EXT-X-MAP:URI="output_video.mp4",BYTERANGE="1091@0"
-#EXT-X-KEY:METHOD=SAMPLE-AES-CENC,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
+#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
 #EXTINF:1.001,
 #EXT-X-BYTERANGE:99313@1159
 output_video.mp4
diff --git a/packager/app/test/testdata/bear-640x360-v-mp4-cenc-golden.m3u8 b/packager/app/test/testdata/bear-640x360-v-mp4-cenc-golden.m3u8
index ac1d7d58d8..2cfe6ed71d 100644
--- a/packager/app/test/testdata/bear-640x360-v-mp4-cenc-golden.m3u8
+++ b/packager/app/test/testdata/bear-640x360-v-mp4-cenc-golden.m3u8
@@ -4,7 +4,7 @@
 #EXT-X-TARGETDURATION:2
 #EXT-X-PLAYLIST-TYPE:VOD
 #EXT-X-MAP:URI="output_video.mp4",BYTERANGE="1091@0"
-#EXT-X-KEY:METHOD=SAMPLE-AES-CENC,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
+#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,URI="data:text/plain;base64,MTIzNDU2Nzg5MDEyMzQ1Ng==",KEYFORMAT="identity"
 #EXTINF:1.001,
 #EXT-X-BYTERANGE:99313@1159
 output_video.mp4
diff --git a/packager/hls/base/media_playlist.cc b/packager/hls/base/media_playlist.cc
index e5d4644de6..11698dc8dc 100644
--- a/packager/hls/base/media_playlist.cc
+++ b/packager/hls/base/media_playlist.cc
@@ -212,7 +212,7 @@ std::string EncryptionInfoEntry::ToString() {
   } else if (method_ == MediaPlaylist::EncryptionMethod::kAes128) {
     method_attribute = "METHOD=AES-128";
   } else if (method_ == MediaPlaylist::EncryptionMethod::kSampleAesCenc) {
-    method_attribute = "METHOD=SAMPLE-AES-CENC";
+    method_attribute = "METHOD=SAMPLE-AES-CTR";
   } else {
     DCHECK(method_ == MediaPlaylist::EncryptionMethod::kNone);
     method_attribute = "METHOD=NONE";
diff --git a/packager/hls/base/media_playlist_unittest.cc b/packager/hls/base/media_playlist_unittest.cc
index 0a8be8ee09..eff9ebd33a 100644
--- a/packager/hls/base/media_playlist_unittest.cc
+++ b/packager/hls/base/media_playlist_unittest.cc
@@ -525,7 +525,7 @@ TEST_F(MediaPlaylistMultiSegmentTest, SampleAesCenc) {
       "test\n"
       "#EXT-X-TARGETDURATION:30\n"
       "#EXT-X-PLAYLIST-TYPE:VOD\n"
-      "#EXT-X-KEY:METHOD=SAMPLE-AES-CENC,"
+      "#EXT-X-KEY:METHOD=SAMPLE-AES-CTR,"
       "URI=\"http://example.com\",IV=0x12345678,KEYFORMATVERSIONS=\"1/2/4\","
       "KEYFORMAT=\"com.widevine\"\n"
       "#EXTINF:10.000,\n"