diff --git a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdKeyPair.kt b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdKeyPair.kt
index c353c9541..0a24db654 100644
--- a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdKeyPair.kt
+++ b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdKeyPair.kt
@@ -11,8 +11,8 @@ actual class KMMEdKeyPair actual constructor(actual val privateKey: KMMEdPrivate
             val generator = KeyPairGenerator.getInstance("Ed25519", provider)
             val javaKeyPair: KeyPair = generator.generateKeyPair()
             return KMMEdKeyPair(
-                KMMEdPrivateKey(javaKeyPair.private),
-                KMMEdPublicKey(javaKeyPair.public)
+                KMMEdPrivateKey(javaKeyPair.private.encoded),
+                KMMEdPublicKey(javaKeyPair.public.encoded)
             )
         }
     }
diff --git a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPrivateKey.kt b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPrivateKey.kt
index 5920cc2b6..f3131e676 100644
--- a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPrivateKey.kt
+++ b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPrivateKey.kt
@@ -1,9 +1,14 @@
 package io.iohk.atala.prism.apollo.utils
 
-import java.security.PrivateKey
+import org.bouncycastle.crypto.params.Ed25519PrivateKeyParameters
+import org.bouncycastle.crypto.signers.Ed25519Signer
 
-actual class KMMEdPrivateKey(val nativeValue: PrivateKey) {
+actual class KMMEdPrivateKey(val raw: ByteArray) {
     actual fun sign(message: ByteArray): ByteArray {
-        throw NotImplementedError("Not implemented")
+        val privateKeyParameters = Ed25519PrivateKeyParameters(raw, 0)
+        val signer = Ed25519Signer()
+        signer.init(true, privateKeyParameters)
+        signer.update(message, 0, message.size)
+        return signer.generateSignature()
     }
 }
diff --git a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPublicKey.kt b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPublicKey.kt
index fead5c456..057007327 100644
--- a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPublicKey.kt
+++ b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPublicKey.kt
@@ -1,9 +1,20 @@
 package io.iohk.atala.prism.apollo.utils
 
-import java.security.PublicKey
+import org.bouncycastle.crypto.params.Ed25519PublicKeyParameters
+import org.bouncycastle.crypto.signers.Ed25519Signer
 
-actual class KMMEdPublicKey(val nativeValue: PublicKey) {
+actual class KMMEdPublicKey(val raw: ByteArray) {
     actual fun verify(message: ByteArray, sig: ByteArray): Boolean {
-        throw NotImplementedError("Not implemented")
+        return try {
+            val publicKeyParams = Ed25519PublicKeyParameters(raw, 0)
+            val verifier = Ed25519Signer()
+
+            verifier.init(false, publicKeyParams)
+            verifier.update(message, 0, message.size)
+
+            verifier.verifySignature(sig)
+        } catch (e: Exception) {
+            return false
+        }
     }
 }
diff --git a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519KeyPair.kt b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519KeyPair.kt
index 89f10828c..57faccaea 100644
--- a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519KeyPair.kt
+++ b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519KeyPair.kt
@@ -15,8 +15,8 @@ actual class KMMX25519KeyPair actual constructor(
             kpg.initialize(XDHParameterSpec(XDHParameterSpec.X25519))
             val javaKeyPair = kpg.generateKeyPair()
             return KMMX25519KeyPair(
-                KMMX25519PrivateKey(javaKeyPair.private),
-                KMMX25519PublicKey(javaKeyPair.public)
+                KMMX25519PrivateKey(javaKeyPair.private.encoded),
+                KMMX25519PublicKey(javaKeyPair.public.encoded)
             )
         }
     }
diff --git a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt
index d95dd5ba5..7f33bb119 100644
--- a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt
+++ b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt
@@ -1,5 +1,3 @@
 package io.iohk.atala.prism.apollo.utils
 
-import java.security.PrivateKey
-
-actual class KMMX25519PrivateKey(val nativeValue: PrivateKey)
+actual class KMMX25519PrivateKey(val raw: ByteArray)
diff --git a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PublicKey.kt b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PublicKey.kt
index 15f9df13e..5c525dc9d 100644
--- a/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PublicKey.kt
+++ b/base-asymmetric-encryption/src/androidMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PublicKey.kt
@@ -1,5 +1,3 @@
 package io.iohk.atala.prism.apollo.utils
 
-import java.security.PublicKey
-
-actual class KMMX25519PublicKey(val nativeValue: PublicKey)
+actual class KMMX25519PublicKey(val raw: ByteArray)
diff --git a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdKeyPair.kt b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdKeyPair.kt
index 51b9a075e..be88bf020 100644
--- a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdKeyPair.kt
+++ b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdKeyPair.kt
@@ -11,17 +11,17 @@ actual class KMMEdKeyPair actual constructor(actual val privateKey: KMMEdPrivate
             val generator = KeyPairGenerator.getInstance("Ed25519", provider)
             val javaKeyPair: KeyPair = generator.generateKeyPair()
             return KMMEdKeyPair(
-                KMMEdPrivateKey(javaKeyPair.private),
-                KMMEdPublicKey(javaKeyPair.public)
+                KMMEdPrivateKey(javaKeyPair.private.encoded),
+                KMMEdPublicKey(javaKeyPair.public.encoded)
             )
         }
     }
 
     actual fun sign(message: ByteArray): ByteArray {
-        TODO("Not yet implemented")
+        return privateKey.sign(message)
     }
 
     actual fun verify(message: ByteArray, sig: ByteArray): Boolean {
-        TODO("Not yet implemented")
+        return publicKey.verify(message, sig)
     }
 }
diff --git a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPrivateKey.kt b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPrivateKey.kt
index c223b6174..06541999a 100644
--- a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPrivateKey.kt
+++ b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPrivateKey.kt
@@ -1,9 +1,15 @@
 package io.iohk.atala.prism.apollo.utils
 
-import java.security.PrivateKey
+import org.bouncycastle.crypto.params.Ed25519PrivateKeyParameters
+import org.bouncycastle.crypto.signers.Ed25519Signer
+
+actual class KMMEdPrivateKey(val raw: ByteArray) {
 
-actual class KMMEdPrivateKey(val nativeValue: PrivateKey) {
     actual fun sign(message: ByteArray): ByteArray {
-        TODO("Not yet implemented")
+        val privateKeyParameters = Ed25519PrivateKeyParameters(raw, 0)
+        val signer = Ed25519Signer()
+        signer.init(true, privateKeyParameters)
+        signer.update(message, 0, message.size)
+        return signer.generateSignature()
     }
 }
diff --git a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPublicKey.kt b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPublicKey.kt
index ac76ef575..057007327 100644
--- a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPublicKey.kt
+++ b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMEdPublicKey.kt
@@ -1,9 +1,20 @@
 package io.iohk.atala.prism.apollo.utils
 
-import java.security.PublicKey
+import org.bouncycastle.crypto.params.Ed25519PublicKeyParameters
+import org.bouncycastle.crypto.signers.Ed25519Signer
 
-actual class KMMEdPublicKey(val nativeValue: PublicKey) {
+actual class KMMEdPublicKey(val raw: ByteArray) {
     actual fun verify(message: ByteArray, sig: ByteArray): Boolean {
-        TODO("Not yet implemented")
+        return try {
+            val publicKeyParams = Ed25519PublicKeyParameters(raw, 0)
+            val verifier = Ed25519Signer()
+
+            verifier.init(false, publicKeyParams)
+            verifier.update(message, 0, message.size)
+
+            verifier.verifySignature(sig)
+        } catch (e: Exception) {
+            return false
+        }
     }
 }
diff --git a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519KeyPair.kt b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519KeyPair.kt
index 89f10828c..57faccaea 100644
--- a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519KeyPair.kt
+++ b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519KeyPair.kt
@@ -15,8 +15,8 @@ actual class KMMX25519KeyPair actual constructor(
             kpg.initialize(XDHParameterSpec(XDHParameterSpec.X25519))
             val javaKeyPair = kpg.generateKeyPair()
             return KMMX25519KeyPair(
-                KMMX25519PrivateKey(javaKeyPair.private),
-                KMMX25519PublicKey(javaKeyPair.public)
+                KMMX25519PrivateKey(javaKeyPair.private.encoded),
+                KMMX25519PublicKey(javaKeyPair.public.encoded)
             )
         }
     }
diff --git a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt
index d95dd5ba5..7f33bb119 100644
--- a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt
+++ b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PrivateKey.kt
@@ -1,5 +1,3 @@
 package io.iohk.atala.prism.apollo.utils
 
-import java.security.PrivateKey
-
-actual class KMMX25519PrivateKey(val nativeValue: PrivateKey)
+actual class KMMX25519PrivateKey(val raw: ByteArray)
diff --git a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PublicKey.kt b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PublicKey.kt
index 15f9df13e..5c525dc9d 100644
--- a/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PublicKey.kt
+++ b/base-asymmetric-encryption/src/jvmMain/kotlin/io/iohk/atala/prism/apollo/utils/KMMX25519PublicKey.kt
@@ -1,5 +1,3 @@
 package io.iohk.atala.prism.apollo.utils
 
-import java.security.PublicKey
-
-actual class KMMX25519PublicKey(val nativeValue: PublicKey)
+actual class KMMX25519PublicKey(val raw: ByteArray)