diff --git a/common/protob/messages-cardano.proto b/common/protob/messages-cardano.proto
index b50588505..e6b06c011 100644
--- a/common/protob/messages-cardano.proto
+++ b/common/protob/messages-cardano.proto
@@ -7,6 +7,12 @@ option java_outer_classname = "TrezorMessageCardano";
 
 import "messages-common.proto";
 
+enum CardanoDerivationType {
+    LEDGER = 0;
+    ICARUS = 1;
+    ICARUS_TREZOR = 2;
+}
+
 /**
  * Values correspond to address header values given by the spec.
  * Script addresses are only supported in transaction outputs.
@@ -103,6 +109,7 @@ message CardanoNativeScript {
 message CardanoGetNativeScriptHash {
     required CardanoNativeScript script = 1;
     required CardanoNativeScriptHashDisplayFormat display_format = 2;   // display hash as bech32 or policy id
+    required CardanoDerivationType derivation_type = 3;
 }
 
 /**
@@ -145,6 +152,7 @@ message CardanoGetAddress {
     required uint32 protocol_magic = 3;                             // network's protocol magic - needed for Byron addresses on testnets
     required uint32 network_id = 4;                                 // network id - mainnet or testnet
     required CardanoAddressParametersType address_parameters = 5;   // parameters used to derive the address
+    required CardanoDerivationType derivation_type = 6;
 }
 
 /**
@@ -164,6 +172,7 @@ message CardanoAddress {
 message CardanoGetPublicKey {
     repeated uint32 address_n = 1;  // BIP-32 path to derive the key from master node
     optional bool show_display = 2; // optionally show on display before sending the result
+    required CardanoDerivationType derivation_type = 3;
 }
 
 /**
@@ -195,6 +204,7 @@ message CardanoSignTxInit {
     optional uint64 validity_interval_start = 11;
     required uint32 witness_requests_count = 12;
     required uint32 minting_asset_groups_count = 13;
+    required CardanoDerivationType derivation_type = 14;
 }
 
 /**
diff --git a/core/src/all_modules.py b/core/src/all_modules.py
index 6081811a2..6d4fd53c2 100644
--- a/core/src/all_modules.py
+++ b/core/src/all_modules.py
@@ -388,6 +388,8 @@ if not utils.BITCOIN_ONLY:
     import trezor.enums.CardanoAddressType
     trezor.enums.CardanoCertificateType
     import trezor.enums.CardanoCertificateType
+    trezor.enums.CardanoDerivationType
+    import trezor.enums.CardanoDerivationType
     trezor.enums.CardanoNativeScriptHashDisplayFormat
     import trezor.enums.CardanoNativeScriptHashDisplayFormat
     trezor.enums.CardanoNativeScriptType
diff --git a/core/src/apps/cardano/seed.py b/core/src/apps/cardano/seed.py
index 5cd83de9d..47f11e8c8 100644
--- a/core/src/apps/cardano/seed.py
+++ b/core/src/apps/cardano/seed.py
@@ -1,18 +1,33 @@
 from storage import cache, device
 from trezor import wire
 from trezor.crypto import bip32, cardano
+from trezor.enums import CardanoDerivationType
 
 from apps.common import mnemonic
-from apps.common.passphrase import get as get_passphrase
-from apps.common.seed import get_seed, derive_and_store_roots
+from apps.common.seed import derive_and_store_roots, get_seed
 
 from .helpers import paths
 
 if False:
-    from typing import Callable, Awaitable
+    from typing import Callable, Awaitable, TypeVar, Union
 
     from apps.common.paths import Bip32Path
-    from apps.common.keychain import MsgIn, MsgOut, Handler
+    from apps.common.keychain import MsgOut, Handler
+
+    from trezor.messages import (
+        CardanoGetAddress,
+        CardanoGetPublicKey,
+        CardanoGetNativeScriptHash,
+        CardanoSignTxInit,
+    )
+
+    CardanoMessages = Union[
+        CardanoGetAddress,
+        CardanoGetPublicKey,
+        CardanoGetNativeScriptHash,
+        CardanoSignTxInit,
+    ]
+    MsgIn = TypeVar("MsgIn", bound=CardanoMessages)
 
     HandlerWithKeychain = Callable[[wire.Context, MsgIn, "Keychain"], Awaitable[MsgOut]]
 
@@ -97,7 +112,7 @@ def is_minting_path(path: Bip32Path) -> bool:
     return path[: len(paths.MINTING_ROOT)] == paths.MINTING_ROOT
 
 
-def derive_and_store_secret(passphrase: str) -> None:
+def derive_and_store_secrets(passphrase: str) -> None:
     assert device.is_initialized()
     assert cache.get(cache.APP_COMMON_DERIVE_CARDANO)
 
@@ -105,33 +120,61 @@ def derive_and_store_secret(passphrase: str) -> None:
         # nothing to do for SLIP-39, where we can derive the root from the main seed
         return
 
-    icarus_trezor_secret = mnemonic.derive_cardano_icarus_trezor(passphrase)
-    cache.set(cache.APP_CARDANO_SECRET, icarus_trezor_secret)
+    icarus_secret = mnemonic.derive_cardano_icarus(passphrase, trezor_derivation=False)
 
+    words = mnemonic.get_secret()
+    assert words is not None, "Mnemonic is not set"
+    # count ASCII spaces, add 1 to get number of words
+    words_count = sum(c == 0x20 for c in words) + 1
 
-@cache.stored_async(cache.APP_CARDANO_SECRET)
-async def _get_secret(ctx: wire.Context) -> bytes:
-    await derive_and_store_roots(ctx)
-    secret = cache.get(cache.APP_CARDANO_SECRET)
-    assert secret is not None
+    if words_count == 24:
+        icarus_trezor_secret = mnemonic.derive_cardano_icarus(
+            passphrase, trezor_derivation=True
+        )
+    else:
+        icarus_trezor_secret = icarus_secret
+
+    cache.set(cache.APP_CARDANO_ICARUS_SECRET, icarus_secret)
+    cache.set(cache.APP_CARDANO_ICARUS_TREZOR_SECRET, icarus_trezor_secret)
+
+
+async def _get_secret(ctx: wire.Context, cache_entry: int) -> bytes:
+    secret = cache.get(cache_entry)
+    if secret is None:
+        await derive_and_store_roots(ctx)
+        secret = cache.get(cache_entry)
+        assert secret is not None
     return secret
 
 
-async def _get_keychain_bip39(ctx: wire.Context) -> Keychain:
+async def _get_keychain_bip39(
+    ctx: wire.Context, derivation_type: CardanoDerivationType
+) -> Keychain:
     if not device.is_initialized():
         raise wire.NotInitialized("Device is not initialized")
 
+    if derivation_type == CardanoDerivationType.LEDGER:
+        seed = await get_seed(ctx)
+        return Keychain(cardano.from_seed_ledger(seed))
+
     if not cache.get(cache.APP_COMMON_DERIVE_CARDANO):
         raise wire.ProcessError("Cardano derivation is not enabled for this session")
 
-    secret = await _get_secret(ctx)
+    if derivation_type == CardanoDerivationType.ICARUS:
+        cache_entry = cache.APP_CARDANO_ICARUS_SECRET
+    else:
+        cache_entry = cache.APP_CARDANO_ICARUS_TREZOR_SECRET
+
+    secret = await _get_secret(ctx, cache_entry)
     root = cardano.from_secret(secret)
     return Keychain(root)
 
 
-async def get_keychain(ctx: wire.Context) -> Keychain:
+async def get_keychain(
+    ctx: wire.Context, derivation_type: CardanoDerivationType
+) -> Keychain:
     if mnemonic.is_bip39():
-        return await _get_keychain_bip39(ctx)
+        return await _get_keychain_bip39(ctx, derivation_type)
     else:
         # derive the root node via SLIP-0023 https://github.com/satoshilabs/slips/blob/master/slip-0022.md
         seed = await get_seed(ctx)
@@ -140,7 +183,7 @@ async def get_keychain(ctx: wire.Context) -> Keychain:
 
 def with_keychain(func: HandlerWithKeychain[MsgIn, MsgOut]) -> Handler[MsgIn, MsgOut]:
     async def wrapper(ctx: wire.Context, msg: MsgIn) -> MsgOut:
-        keychain = await get_keychain(ctx)
+        keychain = await get_keychain(ctx, msg.derivation_type)
         return await func(ctx, msg, keychain)
 
     return wrapper
diff --git a/core/src/apps/common/seed.py b/core/src/apps/common/seed.py
index 6269b88b0..56bf554e4 100644
--- a/core/src/apps/common/seed.py
+++ b/core/src/apps/common/seed.py
@@ -52,7 +52,7 @@ if not utils.BITCOIN_ONLY:
         need_seed = not cache.is_set(cache.APP_COMMON_SEED)
         need_cardano_secret = cache.get(
             cache.APP_COMMON_DERIVE_CARDANO
-        ) and not cache.is_set(cache.APP_CARDANO_SECRET)
+        ) and not cache.is_set(cache.APP_CARDANO_ICARUS_SECRET)
 
         if not need_seed and not need_cardano_secret:
             return
@@ -64,9 +64,9 @@ if not utils.BITCOIN_ONLY:
             cache.set(cache.APP_COMMON_SEED, common_seed)
 
         if need_cardano_secret:
-            from apps.cardano.seed import derive_and_store_secret
+            from apps.cardano.seed import derive_and_store_secrets
 
-            derive_and_store_secret(passphrase)
+            derive_and_store_secrets(passphrase)
 
     @cache.stored_async(cache.APP_COMMON_SEED)
     async def get_seed(ctx: wire.Context) -> bytes:
diff --git a/core/src/storage/cache.py b/core/src/storage/cache.py
index 77693a7b2..fd9f134c5 100644
--- a/core/src/storage/cache.py
+++ b/core/src/storage/cache.py
@@ -20,11 +20,12 @@ _SESSION_ID_LENGTH = 32
 
 # Traditional cache keys
 APP_COMMON_SEED = 0
-APP_COMMON_DERIVE_CARDANO = 1
-APP_CARDANO_SECRET = 2
-APP_MONERO_LIVE_REFRESH = 3
-APP_COMMON_AUTHORIZATION_TYPE = 4
-APP_COMMON_AUTHORIZATION_DATA = 5
+APP_COMMON_AUTHORIZATION_TYPE = 1
+APP_COMMON_AUTHORIZATION_DATA = 2
+APP_COMMON_DERIVE_CARDANO = 3
+APP_CARDANO_ICARUS_SECRET = 4
+APP_CARDANO_ICARUS_TREZOR_SECRET = 5
+APP_MONERO_LIVE_REFRESH = 6
 
 # Keys that are valid across sessions
 APP_COMMON_SEED_WITHOUT_PASSPHRASE = 0 | _SESSIONLESS_FLAG
@@ -92,11 +93,12 @@ class SessionCache(DataCache):
         self.session_id = bytearray(_SESSION_ID_LENGTH)
         self.fields = (
             64,  # APP_COMMON_SEED
-            1,  # APP_COMMON_DERIVE_CARDANO
-            96,  # APP_CARDANO_SECRET
-            1,  # APP_MONERO_LIVE_REFRESH
             2,  # APP_COMMON_AUTHORIZATION_TYPE
             128,  # APP_COMMON_AUTHORIZATION_DATA
+            1,  # APP_COMMON_DERIVE_CARDANO
+            96,  # APP_CARDANO_ICARUS_SECRET
+            96,  # APP_CARDANO_ICARUS_TREZOR_SECRET
+            1,  # APP_MONERO_LIVE_REFRESH
         )
         self.last_usage = 0
         super().__init__()
diff --git a/core/src/trezor/enums/CardanoDerivationType.py b/core/src/trezor/enums/CardanoDerivationType.py
new file mode 100644
index 000000000..6fdea0efb
--- /dev/null
+++ b/core/src/trezor/enums/CardanoDerivationType.py
@@ -0,0 +1,7 @@
+# Automatically generated by pb2py
+# fmt: off
+# isort:skip_file
+
+LEDGER = 0
+ICARUS = 1
+ICARUS_TREZOR = 2
diff --git a/core/src/trezor/enums/__init__.py b/core/src/trezor/enums/__init__.py
index babfefc38..370bc2c56 100644
--- a/core/src/trezor/enums/__init__.py
+++ b/core/src/trezor/enums/__init__.py
@@ -328,6 +328,11 @@ if TYPE_CHECKING:
         TXORIGINPUT = 5
         TXORIGOUTPUT = 6
 
+    class CardanoDerivationType(IntEnum):
+        LEDGER = 0
+        ICARUS = 1
+        ICARUS_TREZOR = 2
+
     class CardanoAddressType(IntEnum):
         BASE = 0
         BASE_SCRIPT_KEY = 1
diff --git a/core/src/trezor/messages.py b/core/src/trezor/messages.py
index 61c5cd0d0..46c7cfa91 100644
--- a/core/src/trezor/messages.py
+++ b/core/src/trezor/messages.py
@@ -27,6 +27,7 @@ if TYPE_CHECKING:
     from trezor.enums import Capability  # noqa: F401
     from trezor.enums import CardanoAddressType  # noqa: F401
     from trezor.enums import CardanoCertificateType  # noqa: F401
+    from trezor.enums import CardanoDerivationType  # noqa: F401
     from trezor.enums import CardanoNativeScriptHashDisplayFormat  # noqa: F401
     from trezor.enums import CardanoNativeScriptType  # noqa: F401
     from trezor.enums import CardanoPoolRelayType  # noqa: F401
@@ -1093,12 +1094,14 @@ if TYPE_CHECKING:
     class CardanoGetNativeScriptHash(protobuf.MessageType):
         script: "CardanoNativeScript"
         display_format: "CardanoNativeScriptHashDisplayFormat"
+        derivation_type: "CardanoDerivationType"
 
         def __init__(
             self,
             *,
             script: "CardanoNativeScript",
             display_format: "CardanoNativeScriptHashDisplayFormat",
+            derivation_type: "CardanoDerivationType",
         ) -> None:
             pass
 
@@ -1151,6 +1154,7 @@ if TYPE_CHECKING:
         protocol_magic: "int"
         network_id: "int"
         address_parameters: "CardanoAddressParametersType"
+        derivation_type: "CardanoDerivationType"
 
         def __init__(
             self,
@@ -1158,6 +1162,7 @@ if TYPE_CHECKING:
             protocol_magic: "int",
             network_id: "int",
             address_parameters: "CardanoAddressParametersType",
+            derivation_type: "CardanoDerivationType",
             show_display: "bool | None" = None,
         ) -> None:
             pass
@@ -1183,10 +1188,12 @@ if TYPE_CHECKING:
     class CardanoGetPublicKey(protobuf.MessageType):
         address_n: "list[int]"
         show_display: "bool | None"
+        derivation_type: "CardanoDerivationType"
 
         def __init__(
             self,
             *,
+            derivation_type: "CardanoDerivationType",
             address_n: "list[int] | None" = None,
             show_display: "bool | None" = None,
         ) -> None:
@@ -1226,6 +1233,7 @@ if TYPE_CHECKING:
         validity_interval_start: "int | None"
         witness_requests_count: "int"
         minting_asset_groups_count: "int"
+        derivation_type: "CardanoDerivationType"
 
         def __init__(
             self,
@@ -1241,6 +1249,7 @@ if TYPE_CHECKING:
             has_auxiliary_data: "bool",
             witness_requests_count: "int",
             minting_asset_groups_count: "int",
+            derivation_type: "CardanoDerivationType",
             ttl: "int | None" = None,
             validity_interval_start: "int | None" = None,
         ) -> None:
diff --git a/python/src/trezorlib/messages.py b/python/src/trezorlib/messages.py
index 3a6ee1d64..d933a508f 100644
--- a/python/src/trezorlib/messages.py
+++ b/python/src/trezorlib/messages.py
@@ -341,6 +341,12 @@ class RequestType(IntEnum):
     TXORIGOUTPUT = 6
 
 
+class CardanoDerivationType(IntEnum):
+    LEDGER = 0
+    ICARUS = 1
+    ICARUS_TREZOR = 2
+
+
 class CardanoAddressType(IntEnum):
     BASE = 0
     BASE_SCRIPT_KEY = 1
@@ -1957,6 +1963,7 @@ class CardanoGetNativeScriptHash(protobuf.MessageType):
     FIELDS = {
         1: protobuf.Field("script", "CardanoNativeScript", repeated=False, required=True),
         2: protobuf.Field("display_format", "CardanoNativeScriptHashDisplayFormat", repeated=False, required=True),
+        3: protobuf.Field("derivation_type", "CardanoDerivationType", repeated=False, required=True),
     }
 
     def __init__(
@@ -1964,9 +1971,11 @@ class CardanoGetNativeScriptHash(protobuf.MessageType):
         *,
         script: "CardanoNativeScript",
         display_format: "CardanoNativeScriptHashDisplayFormat",
+        derivation_type: "CardanoDerivationType",
     ) -> None:
         self.script = script
         self.display_format = display_format
+        self.derivation_type = derivation_type
 
 
 class CardanoNativeScriptHash(protobuf.MessageType):
@@ -2022,6 +2031,7 @@ class CardanoGetAddress(protobuf.MessageType):
         3: protobuf.Field("protocol_magic", "uint32", repeated=False, required=True),
         4: protobuf.Field("network_id", "uint32", repeated=False, required=True),
         5: protobuf.Field("address_parameters", "CardanoAddressParametersType", repeated=False, required=True),
+        6: protobuf.Field("derivation_type", "CardanoDerivationType", repeated=False, required=True),
     }
 
     def __init__(
@@ -2030,11 +2040,13 @@ class CardanoGetAddress(protobuf.MessageType):
         protocol_magic: "int",
         network_id: "int",
         address_parameters: "CardanoAddressParametersType",
+        derivation_type: "CardanoDerivationType",
         show_display: Optional["bool"] = False,
     ) -> None:
         self.protocol_magic = protocol_magic
         self.network_id = network_id
         self.address_parameters = address_parameters
+        self.derivation_type = derivation_type
         self.show_display = show_display
 
 
@@ -2057,15 +2069,18 @@ class CardanoGetPublicKey(protobuf.MessageType):
     FIELDS = {
         1: protobuf.Field("address_n", "uint32", repeated=True, required=False),
         2: protobuf.Field("show_display", "bool", repeated=False, required=False),
+        3: protobuf.Field("derivation_type", "CardanoDerivationType", repeated=False, required=True),
     }
 
     def __init__(
         self,
         *,
+        derivation_type: "CardanoDerivationType",
         address_n: Optional[List["int"]] = None,
         show_display: Optional["bool"] = None,
     ) -> None:
         self.address_n = address_n if address_n is not None else []
+        self.derivation_type = derivation_type
         self.show_display = show_display
 
 
@@ -2102,6 +2117,7 @@ class CardanoSignTxInit(protobuf.MessageType):
         11: protobuf.Field("validity_interval_start", "uint64", repeated=False, required=False),
         12: protobuf.Field("witness_requests_count", "uint32", repeated=False, required=True),
         13: protobuf.Field("minting_asset_groups_count", "uint32", repeated=False, required=True),
+        14: protobuf.Field("derivation_type", "CardanoDerivationType", repeated=False, required=True),
     }
 
     def __init__(
@@ -2118,6 +2134,7 @@ class CardanoSignTxInit(protobuf.MessageType):
         has_auxiliary_data: "bool",
         witness_requests_count: "int",
         minting_asset_groups_count: "int",
+        derivation_type: "CardanoDerivationType",
         ttl: Optional["int"] = None,
         validity_interval_start: Optional["int"] = None,
     ) -> None:
@@ -2132,6 +2149,7 @@ class CardanoSignTxInit(protobuf.MessageType):
         self.has_auxiliary_data = has_auxiliary_data
         self.witness_requests_count = witness_requests_count
         self.minting_asset_groups_count = minting_asset_groups_count
+        self.derivation_type = derivation_type
         self.ttl = ttl
         self.validity_interval_start = validity_interval_start