diff --git a/util/crypto/derived_test.go b/util/crypto/derived_test.go
new file mode 100644
index 00000000..24fd75df
--- /dev/null
+++ b/util/crypto/derived_test.go
@@ -0,0 +1,22 @@
+package crypto
+
+import (
+	"crypto/rand"
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestDerivedKey(t *testing.T) {
+	seed := make([]byte, 32)
+	_, err := rand.Read(seed)
+	require.NoError(t, err)
+	key, err := DeriveSymmetricKey(seed, AnytypeAccountPath)
+	require.NoError(t, err)
+	_, err = rand.Read(seed)
+	require.NoError(t, err)
+	res, err := key.Encrypt(seed)
+	require.NoError(t, err)
+	dec, err := key.Decrypt(res)
+	require.NoError(t, err)
+	require.Equal(t, seed, dec)
+}
diff --git a/util/crypto/ed25519_test.go b/util/crypto/ed25519_test.go
index 5b96ecb6..92565723 100644
--- a/util/crypto/ed25519_test.go
+++ b/util/crypto/ed25519_test.go
@@ -9,12 +9,25 @@ import (
 func Test_EncryptDecrypt(t *testing.T) {
 	privKey, pubKey, err := GenerateEd25519Key(rand.Reader)
 	require.NoError(t, err)
-	msg := make([]byte, 32768)
+	msg := make([]byte, 32000)
 	_, err = rand.Read(msg)
 	require.NoError(t, err)
 	enc, err := pubKey.Encrypt(msg)
 	require.NoError(t, err)
 	dec, err := privKey.Decrypt(enc)
 	require.NoError(t, err)
+	require.NotEqual(t, enc, dec)
 	require.Equal(t, dec, msg)
 }
+
+func Test_SignVerify(t *testing.T) {
+	privKey, pubKey, err := GenerateEd25519Key(rand.Reader)
+	require.NoError(t, err)
+	msg := make([]byte, 32000)
+	_, err = rand.Read(msg)
+	sign, err := privKey.Sign(msg)
+	require.NoError(t, err)
+	res, err := pubKey.Verify(msg, sign)
+	require.NoError(t, err)
+	require.True(t, res)
+}
diff --git a/util/crypto/mnemonic_test.go b/util/crypto/mnemonic_test.go
new file mode 100644
index 00000000..176dabbf
--- /dev/null
+++ b/util/crypto/mnemonic_test.go
@@ -0,0 +1,25 @@
+package crypto
+
+import (
+	"crypto/rand"
+	"github.com/stretchr/testify/require"
+	"strings"
+	"testing"
+)
+
+func TestMnemonic(t *testing.T) {
+	phrase, err := NewMnemonicGenerator().WithWordCount(12)
+	require.NoError(t, err)
+	parts := strings.Split(string(phrase), " ")
+	require.Equal(t, 12, len(parts))
+	key, err := phrase.DeriveEd25519Key(0)
+	require.NoError(t, err)
+	bytes := make([]byte, 64)
+	_, err = rand.Read(bytes)
+	require.NoError(t, err)
+	sign, err := key.Sign(bytes)
+	require.NoError(t, err)
+	res, err := key.GetPublic().Verify(bytes, sign)
+	require.NoError(t, err)
+	require.True(t, res)
+}
diff --git a/util/crypto/peer.go b/util/crypto/peer.go
index a7a7ac3d..cde5a940 100644
--- a/util/crypto/peer.go
+++ b/util/crypto/peer.go
@@ -10,11 +10,9 @@ func IdFromSigningPubKey(pubKey PubKey) (peer.ID, error) {
 	if err != nil {
 		return "", err
 	}
-
 	libp2pKey, err := crypto.UnmarshalEd25519PublicKey(rawSigning)
 	if err != nil {
 		return "", err
 	}
-
 	return peer.IDFromPublicKey(libp2pKey)
 }