diff --git a/fs_mgr/fs_mgr_fstab.cpp b/fs_mgr/fs_mgr_fstab.cpp
index 2ff5243..d216458 100644
--- a/fs_mgr/fs_mgr_fstab.cpp
+++ b/fs_mgr/fs_mgr_fstab.cpp
@@ -99,71 +99,9 @@
     return false;
 }
 
-const std::array<const char*, 3> kFileContentsEncryptionMode = {
-        "aes-256-xts",
-        "adiantum",
-        "ice",
-};
-
-const std::array<const char*, 3> kFileNamesEncryptionMode = {
-        "aes-256-cts",
-        "aes-256-heh",
-        "adiantum",
-};
-
 void ParseFileEncryption(const std::string& arg, FstabEntry* entry) {
-    // The fileencryption flag is followed by an = and 1 to 3 colon-separated fields:
-    //
-    // 1. Contents encryption mode
-    // 2. Filenames encryption mode (defaults to "aes-256-cts" or "adiantum"
-    //    depending on the contents encryption mode)
-    // 3. Encryption policy version (defaults to "v1". Use "v2" on new devices.)
     entry->fs_mgr_flags.file_encryption = true;
-
-    auto parts = Split(arg, ":");
-    if (parts.empty() || parts.size() > 3) {
-        LWARNING << "Warning: fileencryption= flag malformed: " << arg;
-        return;
-    }
-
-    // Alias for backwards compatibility.
-    if (parts[0] == "software") {
-        parts[0] = "aes-256-xts";
-    }
-
-    if (std::find(kFileContentsEncryptionMode.begin(), kFileContentsEncryptionMode.end(),
-                  parts[0]) == kFileContentsEncryptionMode.end()) {
-        LWARNING << "fileencryption= flag malformed, file contents encryption mode not found: "
-                 << arg;
-        return;
-    }
-
-    entry->file_contents_mode = parts[0];
-
-    if (parts.size() >= 2) {
-        if (std::find(kFileNamesEncryptionMode.begin(), kFileNamesEncryptionMode.end(), parts[1]) ==
-            kFileNamesEncryptionMode.end()) {
-            LWARNING << "fileencryption= flag malformed, file names encryption mode not found: "
-                     << arg;
-            return;
-        }
-
-        entry->file_names_mode = parts[1];
-    } else if (entry->file_contents_mode == "adiantum") {
-        entry->file_names_mode = "adiantum";
-    } else {
-        entry->file_names_mode = "aes-256-cts";
-    }
-
-    if (parts.size() >= 3) {
-        if (!android::base::StartsWith(parts[2], 'v') ||
-            !android::base::ParseInt(&parts[2][1], &entry->file_policy_version)) {
-            LWARNING << "fileencryption= flag malformed, unknown options: " << arg;
-            return;
-        }
-    } else {
-        entry->file_policy_version = 1;
-    }
+    entry->encryption_options = arg;
 }
 
 bool SetMountFlag(const std::string& flag, FstabEntry* entry) {
@@ -299,9 +237,7 @@
             // return it.
             entry->fs_mgr_flags.force_fde_or_fbe = true;
             entry->key_loc = arg;
-            entry->file_contents_mode = "aes-256-xts";
-            entry->file_names_mode = "aes-256-cts";
-            entry->file_policy_version = 1;
+            entry->encryption_options = "aes-256-xts:aes-256-cts";
         } else if (StartsWith(flag, "max_comp_streams=")) {
             if (!ParseInt(arg, &entry->max_comp_streams)) {
                 LWARNING << "Warning: max_comp_streams= flag malformed: " << arg;
diff --git a/fs_mgr/include_fstab/fstab/fstab.h b/fs_mgr/include_fstab/fstab/fstab.h
index 3c517dc..c6a16e3 100644
--- a/fs_mgr/include_fstab/fstab/fstab.h
+++ b/fs_mgr/include_fstab/fstab/fstab.h
@@ -45,9 +45,7 @@
     int max_comp_streams = 0;
     off64_t zram_size = 0;
     off64_t reserved_size = 0;
-    std::string file_contents_mode;
-    std::string file_names_mode;
-    int file_policy_version = 0;
+    std::string encryption_options;
     off64_t erase_blk_size = 0;
     off64_t logical_blk_size = 0;
     std::string sysfs_path;
diff --git a/fs_mgr/tests/fs_mgr_test.cpp b/fs_mgr/tests/fs_mgr_test.cpp
index a7ea817..68764fc 100644
--- a/fs_mgr/tests/fs_mgr_test.cpp
+++ b/fs_mgr/tests/fs_mgr_test.cpp
@@ -420,8 +420,7 @@
     EXPECT_EQ(0, entry->max_comp_streams);
     EXPECT_EQ(0, entry->zram_size);
     EXPECT_EQ(0, entry->reserved_size);
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
+    EXPECT_EQ("", entry->encryption_options);
     EXPECT_EQ(0, entry->erase_blk_size);
     EXPECT_EQ(0, entry->logical_blk_size);
     EXPECT_EQ("", entry->sysfs_path);
@@ -448,8 +447,7 @@
     EXPECT_EQ(0, entry->max_comp_streams);
     EXPECT_EQ(0, entry->zram_size);
     EXPECT_EQ(0, entry->reserved_size);
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
+    EXPECT_EQ("", entry->encryption_options);
     EXPECT_EQ(0, entry->erase_blk_size);
     EXPECT_EQ(0, entry->logical_blk_size);
     EXPECT_EQ("", entry->sysfs_path);
@@ -458,16 +456,14 @@
     EXPECT_EQ("", entry->zram_backing_dev_path);
     entry++;
 
-    // forcefdeorfbe sets file_contents_mode and file_names_mode by default, so test it separately.
+    // forcefdeorfbe has its own encryption_options defaults, so test it separately.
     EXPECT_EQ("none2", entry->mount_point);
     {
         FstabEntry::FsMgrFlags flags = {};
         flags.force_fde_or_fbe = true;
         EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
     }
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
+    EXPECT_EQ("aes-256-xts:aes-256-cts", entry->encryption_options);
     EXPECT_EQ("", entry->key_loc);
 }
 
@@ -681,37 +677,21 @@
     EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
 
     EXPECT_EQ("/dir/key", entry->key_loc);
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
+    EXPECT_EQ("aes-256-xts:aes-256-cts", entry->encryption_options);
 }
 
 TEST(fs_mgr, ReadFstabFromFile_FsMgrOptions_FileEncryption) {
     TemporaryFile tf;
     ASSERT_TRUE(tf.fd != -1);
     std::string fstab_contents = R"fs(
-source none0       swap   defaults      fileencryption=blah
-source none1       swap   defaults      fileencryption=software
-source none2       swap   defaults      fileencryption=aes-256-xts
-source none3       swap   defaults      fileencryption=adiantum
-source none4       swap   defaults      fileencryption=adiantum:aes-256-heh
-source none5       swap   defaults      fileencryption=ice
-source none6       swap   defaults      fileencryption=ice:blah
-source none7       swap   defaults      fileencryption=ice:aes-256-cts
-source none8       swap   defaults      fileencryption=ice:aes-256-heh
-source none9       swap   defaults      fileencryption=ice:adiantum
-source none10      swap   defaults      fileencryption=aes-256-xts:aes-256-cts:v1
-source none11      swap   defaults      fileencryption=aes-256-xts:aes-256-cts:v2
-source none12      swap   defaults      fileencryption=aes-256-xts:aes-256-cts:v2:
-source none13      swap   defaults      fileencryption=aes-256-xts:aes-256-cts:blah
-source none14      swap   defaults      fileencryption=aes-256-xts:aes-256-cts:vblah
+source none0       swap   defaults      fileencryption=aes-256-xts:aes-256-cts:v1
 )fs";
 
     ASSERT_TRUE(android::base::WriteStringToFile(fstab_contents, tf.path));
 
     Fstab fstab;
     EXPECT_TRUE(ReadFstabFromFile(tf.path, &fstab));
-    ASSERT_EQ(15U, fstab.size());
+    ASSERT_EQ(1U, fstab.size());
 
     FstabEntry::FsMgrFlags flags = {};
     flags.file_encryption = true;
@@ -719,107 +699,7 @@
     auto entry = fstab.begin();
     EXPECT_EQ("none0", entry->mount_point);
     EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
-    EXPECT_EQ(0, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none1", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none2", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none3", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("adiantum", entry->file_contents_mode);
-    EXPECT_EQ("adiantum", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none4", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("adiantum", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-heh", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none5", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none6", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
-    EXPECT_EQ(0, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none7", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none8", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-heh", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none9", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("adiantum", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none10", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none11", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(2, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none12", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
-    EXPECT_EQ(0, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none13", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(0, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none14", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(0, entry->file_policy_version);
+    EXPECT_EQ("aes-256-xts:aes-256-cts:v1", entry->encryption_options);
 }
 
 TEST(fs_mgr, ReadFstabFromFile_FsMgrOptions_MaxCompStreams) {