diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7b2c97295b0f..d4cf410ec645 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -37,6 +37,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 ## [Unreleased]
 
 ### Improvements
+* (crypto) [\#7987](https://github.com/cosmos/cosmos-sdk/pull/7987) Fix the inconsistency of CryptoCdc, only use `codec/legacy.Cdc`.
 * (SDK) [\#7925](https://github.com/cosmos/cosmos-sdk/pull/7925) Updated dependencies to use gRPC v1.33.2
   * Updated gRPC dependency to v1.33.2
   * Updated iavl dependency to v0.15-rc2
diff --git a/codec/legacy/codec.go b/codec/legacy/codec.go
index 09225998e0be..5ec6b2976cab 100644
--- a/codec/legacy/codec.go
+++ b/codec/legacy/codec.go
@@ -3,6 +3,7 @@ package legacy
 import (
 	"github.com/cosmos/cosmos-sdk/codec"
 	cryptocodec "github.com/cosmos/cosmos-sdk/crypto/codec"
+	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
 )
 
 // Cdc defines a global generic sealed Amino codec to be used throughout sdk. It
@@ -15,5 +16,16 @@ func init() {
 	Cdc = codec.NewLegacyAmino()
 	cryptocodec.RegisterCrypto(Cdc)
 	codec.RegisterEvidences(Cdc)
-	Cdc.Seal()
+}
+
+// PrivKeyFromBytes unmarshals private key bytes and returns a PrivKey
+func PrivKeyFromBytes(privKeyBytes []byte) (privKey cryptotypes.PrivKey, err error) {
+	err = Cdc.UnmarshalBinaryBare(privKeyBytes, &privKey)
+	return
+}
+
+// PubKeyFromBytes unmarshals public key bytes and returns a PubKey
+func PubKeyFromBytes(pubKeyBytes []byte) (pubKey cryptotypes.PubKey, err error) {
+	err = Cdc.UnmarshalBinaryBare(pubKeyBytes, &pubKey)
+	return
 }
diff --git a/codec/types/any.go b/codec/types/any.go
index 38fe4b42aa72..4a30ddad4d0f 100644
--- a/codec/types/any.go
+++ b/codec/types/any.go
@@ -1,8 +1,9 @@
 package types
 
 import (
-	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 	"github.com/gogo/protobuf/proto"
+
+	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 )
 
 type Any struct {
diff --git a/crypto/armor.go b/crypto/armor.go
index 3ee472707a71..35deb107798f 100644
--- a/crypto/armor.go
+++ b/crypto/armor.go
@@ -10,7 +10,6 @@ import (
 	"github.com/tendermint/tendermint/crypto/xsalsa20symmetric"
 
 	"github.com/cosmos/cosmos-sdk/codec/legacy"
-	cryptoAmino "github.com/cosmos/cosmos-sdk/crypto/codec"
 	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 )
@@ -153,7 +152,7 @@ func encryptPrivKey(privKey cryptotypes.PrivKey, passphrase string) (saltBytes [
 	}
 
 	key = crypto.Sha256(key) // get 32 bytes
-	privKeyBytes := legacy.Cdc.Amino.MustMarshalBinaryBare(privKey)
+	privKeyBytes := legacy.Cdc.MustMarshalBinaryBare(privKey)
 
 	return saltBytes, xsalsa20symmetric.EncryptSymmetric(privKeyBytes, key)
 }
@@ -206,5 +205,5 @@ func decryptPrivKey(saltBytes []byte, encBytes []byte, passphrase string) (privK
 		return privKey, err
 	}
 
-	return cryptoAmino.PrivKeyFromBytes(privKeyBytes)
+	return legacy.PrivKeyFromBytes(privKeyBytes)
 }
diff --git a/crypto/armor_test.go b/crypto/armor_test.go
index 3267ca98a78c..abbc7870aaee 100644
--- a/crypto/armor_test.go
+++ b/crypto/armor_test.go
@@ -15,7 +15,6 @@ import (
 
 	"github.com/cosmos/cosmos-sdk/codec/legacy"
 	"github.com/cosmos/cosmos-sdk/crypto"
-	cryptoAmino "github.com/cosmos/cosmos-sdk/crypto/codec"
 	"github.com/cosmos/cosmos-sdk/crypto/hd"
 	"github.com/cosmos/cosmos-sdk/crypto/keyring"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1"
@@ -79,7 +78,7 @@ func TestArmorUnarmorPubKey(t *testing.T) {
 	armored := crypto.ArmorPubKeyBytes(legacy.Cdc.Amino.MustMarshalBinaryBare(info.GetPubKey()), "")
 	pubBytes, algo, err := crypto.UnarmorPubKeyBytes(armored)
 	require.NoError(t, err)
-	pub, err := cryptoAmino.PubKeyFromBytes(pubBytes)
+	pub, err := legacy.PubKeyFromBytes(pubBytes)
 	require.NoError(t, err)
 	require.Equal(t, string(hd.Secp256k1Type), algo)
 	require.True(t, pub.Equals(info.GetPubKey()))
@@ -87,7 +86,7 @@ func TestArmorUnarmorPubKey(t *testing.T) {
 	armored = crypto.ArmorPubKeyBytes(legacy.Cdc.Amino.MustMarshalBinaryBare(info.GetPubKey()), "unknown")
 	pubBytes, algo, err = crypto.UnarmorPubKeyBytes(armored)
 	require.NoError(t, err)
-	pub, err = cryptoAmino.PubKeyFromBytes(pubBytes)
+	pub, err = legacy.PubKeyFromBytes(pubBytes)
 	require.NoError(t, err)
 	require.Equal(t, "unknown", algo)
 	require.True(t, pub.Equals(info.GetPubKey()))
diff --git a/crypto/codec/amino.go b/crypto/codec/amino.go
index 5cd61c3dd31f..d50a08864c24 100644
--- a/crypto/codec/amino.go
+++ b/crypto/codec/amino.go
@@ -10,13 +10,6 @@ import (
 	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
 )
 
-var amino *codec.LegacyAmino
-
-func init() {
-	amino = codec.NewLegacyAmino()
-	RegisterCrypto(amino)
-}
-
 // RegisterCrypto registers all crypto dependency types with the provided Amino
 // codec.
 func RegisterCrypto(cdc *codec.LegacyAmino) {
@@ -38,15 +31,3 @@ func RegisterCrypto(cdc *codec.LegacyAmino) {
 	cdc.RegisterConcrete(&secp256k1.PrivKey{},
 		secp256k1.PrivKeyName, nil)
 }
-
-// PrivKeyFromBytes unmarshals private key bytes and returns a PrivKey
-func PrivKeyFromBytes(privKeyBytes []byte) (privKey cryptotypes.PrivKey, err error) {
-	err = amino.UnmarshalBinaryBare(privKeyBytes, &privKey)
-	return
-}
-
-// PubKeyFromBytes unmarshals public key bytes and returns a PubKey
-func PubKeyFromBytes(pubKeyBytes []byte) (pubKey cryptotypes.PubKey, err error) {
-	err = amino.UnmarshalBinaryBare(pubKeyBytes, &pubKey)
-	return
-}
diff --git a/crypto/keyring/codec.go b/crypto/keyring/codec.go
index 6e6a254c87e3..558f377752d2 100644
--- a/crypto/keyring/codec.go
+++ b/crypto/keyring/codec.go
@@ -2,18 +2,12 @@ package keyring
 
 import (
 	"github.com/cosmos/cosmos-sdk/codec"
-	cryptocodec "github.com/cosmos/cosmos-sdk/crypto/codec"
+	"github.com/cosmos/cosmos-sdk/codec/legacy"
 	"github.com/cosmos/cosmos-sdk/crypto/hd"
 )
 
-// CryptoCdc defines the codec required for keys and info
-var CryptoCdc *codec.LegacyAmino
-
 func init() {
-	CryptoCdc = codec.NewLegacyAmino()
-	cryptocodec.RegisterCrypto(CryptoCdc)
-	RegisterLegacyAminoCodec(CryptoCdc)
-	CryptoCdc.Seal()
+	RegisterLegacyAminoCodec(legacy.Cdc)
 }
 
 // RegisterLegacyAminoCodec registers concrete types and interfaces on the given codec.
diff --git a/crypto/keyring/info.go b/crypto/keyring/info.go
index f05e2f0ddef6..24024599bba7 100644
--- a/crypto/keyring/info.go
+++ b/crypto/keyring/info.go
@@ -3,6 +3,7 @@ package keyring
 import (
 	"fmt"
 
+	"github.com/cosmos/cosmos-sdk/codec/legacy"
 	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
 	"github.com/cosmos/cosmos-sdk/crypto/hd"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/multisig"
@@ -246,12 +247,12 @@ func (i multiInfo) UnpackInterfaces(unpacker codectypes.AnyUnpacker) error {
 
 // encoding info
 func marshalInfo(i Info) []byte {
-	return CryptoCdc.MustMarshalBinaryLengthPrefixed(i)
+	return legacy.Cdc.MustMarshalBinaryLengthPrefixed(i)
 }
 
 // decoding info
 func unmarshalInfo(bz []byte) (info Info, err error) {
-	err = CryptoCdc.UnmarshalBinaryLengthPrefixed(bz, &info)
+	err = legacy.Cdc.UnmarshalBinaryLengthPrefixed(bz, &info)
 	if err != nil {
 		return nil, err
 	}
@@ -266,7 +267,7 @@ func unmarshalInfo(bz []byte) (info Info, err error) {
 	_, ok := info.(multiInfo)
 	if ok {
 		var multi multiInfo
-		err = CryptoCdc.UnmarshalBinaryLengthPrefixed(bz, &multi)
+		err = legacy.Cdc.UnmarshalBinaryLengthPrefixed(bz, &multi)
 
 		return multi, err
 	}
diff --git a/crypto/keyring/keyring.go b/crypto/keyring/keyring.go
index f26a06b93807..f88ffdc37010 100644
--- a/crypto/keyring/keyring.go
+++ b/crypto/keyring/keyring.go
@@ -18,8 +18,8 @@ import (
 	tmcrypto "github.com/tendermint/tendermint/crypto"
 
 	"github.com/cosmos/cosmos-sdk/client/input"
+	"github.com/cosmos/cosmos-sdk/codec/legacy"
 	"github.com/cosmos/cosmos-sdk/crypto"
-	cryptoamino "github.com/cosmos/cosmos-sdk/crypto/codec"
 	"github.com/cosmos/cosmos-sdk/crypto/hd"
 	"github.com/cosmos/cosmos-sdk/crypto/ledger"
 	"github.com/cosmos/cosmos-sdk/crypto/types"
@@ -213,7 +213,7 @@ func (ks keystore) ExportPubKeyArmor(uid string) (string, error) {
 		return "", fmt.Errorf("no key to export with name: %s", uid)
 	}
 
-	return crypto.ArmorPubKeyBytes(CryptoCdc.MustMarshalBinaryBare(bz.GetPubKey()), string(bz.GetAlgo())), nil
+	return crypto.ArmorPubKeyBytes(legacy.Cdc.MustMarshalBinaryBare(bz.GetPubKey()), string(bz.GetAlgo())), nil
 }
 
 func (ks keystore) ExportPubKeyArmorByAddress(address sdk.Address) (string, error) {
@@ -255,7 +255,7 @@ func (ks keystore) ExportPrivateKeyObject(uid string) (types.PrivKey, error) {
 			return nil, err
 		}
 
-		priv, err = cryptoamino.PrivKeyFromBytes([]byte(linfo.PrivKeyArmor))
+		priv, err = legacy.PrivKeyFromBytes([]byte(linfo.PrivKeyArmor))
 		if err != nil {
 			return nil, err
 		}
@@ -304,7 +304,7 @@ func (ks keystore) ImportPubKey(uid string, armor string) error {
 		return err
 	}
 
-	pubKey, err := cryptoamino.PubKeyFromBytes(pubBytes)
+	pubKey, err := legacy.PubKeyFromBytes(pubBytes)
 	if err != nil {
 		return err
 	}
@@ -331,7 +331,7 @@ func (ks keystore) Sign(uid string, msg []byte) ([]byte, types.PubKey, error) {
 			return nil, nil, fmt.Errorf("private key not available")
 		}
 
-		priv, err = cryptoamino.PrivKeyFromBytes([]byte(i.PrivKeyArmor))
+		priv, err = legacy.PrivKeyFromBytes([]byte(i.PrivKeyArmor))
 		if err != nil {
 			return nil, nil, err
 		}
@@ -711,7 +711,7 @@ func (ks keystore) writeLocalKey(name string, priv types.PrivKey, algo hd.PubKey
 	// encrypt private key using keyring
 	pub := priv.PubKey()
 
-	info := newLocalInfo(name, pub, string(CryptoCdc.MustMarshalBinaryBare(priv)), algo)
+	info := newLocalInfo(name, pub, string(legacy.Cdc.MustMarshalBinaryBare(priv)), algo)
 	if err := ks.writeInfo(info); err != nil {
 		return nil, err
 	}
diff --git a/crypto/keyring/types_test.go b/crypto/keyring/types_test.go
index 8c68bce670a5..b04aa4547964 100644
--- a/crypto/keyring/types_test.go
+++ b/crypto/keyring/types_test.go
@@ -4,10 +4,11 @@ import (
 	"encoding/hex"
 	"testing"
 
+	"github.com/stretchr/testify/require"
+
 	"github.com/cosmos/cosmos-sdk/crypto/hd"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1"
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	"github.com/stretchr/testify/require"
 )
 
 func Test_writeReadLedgerInfo(t *testing.T) {
diff --git a/crypto/ledger/ledger_test.go b/crypto/ledger/ledger_test.go
index 5fe9da8f55f3..ec1b8dbedc3b 100644
--- a/crypto/ledger/ledger_test.go
+++ b/crypto/ledger/ledger_test.go
@@ -6,7 +6,7 @@ import (
 
 	"github.com/stretchr/testify/require"
 
-	cryptoAmino "github.com/cosmos/cosmos-sdk/crypto/codec"
+	"github.com/cosmos/cosmos-sdk/codec/legacy"
 	"github.com/cosmos/cosmos-sdk/crypto/hd"
 	"github.com/cosmos/cosmos-sdk/crypto/types"
 	"github.com/cosmos/cosmos-sdk/testutil"
@@ -238,7 +238,7 @@ func TestRealDeviceSecp256k1(t *testing.T) {
 
 	// now, let's serialize the public key and make sure it still works
 	bs := cdc.Amino.MustMarshalBinaryBare(priv.PubKey())
-	pub2, err := cryptoAmino.PubKeyFromBytes(bs)
+	pub2, err := legacy.PubKeyFromBytes(bs)
 	require.Nil(t, err, "%+v", err)
 
 	// make sure we get the same pubkey when we load from disk
@@ -251,8 +251,8 @@ func TestRealDeviceSecp256k1(t *testing.T) {
 	require.True(t, valid)
 
 	// make sure pubkeys serialize properly as well
-	bs = cdc.Amino.MustMarshalBinaryBare(pub)
-	bpub, err := cryptoAmino.PubKeyFromBytes(bs)
+	bs = legacy.Cdc.MustMarshalBinaryBare(pub)
+	bpub, err := legacy.PubKeyFromBytes(bs)
 	require.NoError(t, err)
 	require.Equal(t, pub, bpub)
 }
diff --git a/types/address.go b/types/address.go
index 7e0408a84982..ba9e5b303b6a 100644
--- a/types/address.go
+++ b/types/address.go
@@ -11,7 +11,6 @@ import (
 	yaml "gopkg.in/yaml.v2"
 
 	"github.com/cosmos/cosmos-sdk/codec/legacy"
-	cryptocodec "github.com/cosmos/cosmos-sdk/crypto/codec"
 	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
 	"github.com/cosmos/cosmos-sdk/types/bech32"
 )
@@ -663,7 +662,7 @@ func GetPubKeyFromBech32(pkt Bech32PubKeyType, pubkeyStr string) (cryptotypes.Pu
 		return nil, err
 	}
 
-	return cryptocodec.PubKeyFromBytes(bz)
+	return legacy.PubKeyFromBytes(bz)
 }
 
 // MustGetPubKeyFromBech32 calls GetPubKeyFromBech32 except it panics on error.