diff --git a/apollo/src/androidMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt b/apollo/src/androidMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
index 6a37c7c02..abe1c348a 100644
--- a/apollo/src/androidMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
+++ b/apollo/src/androidMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
@@ -78,7 +78,7 @@ actual class EdHDKey actual constructor(
          */
         actual fun initFromSeed(seed: ByteArray): EdHDKey {
             require(seed.size == 64) {
-                "Seed expected byte length to be ${ECConfig.PRIVATE_KEY_BYTE_SIZE}"
+                "Seed expected byte length to be ${ECConfig.SEED_BYTE_SIZE}"
             }
 
             val keySlice = seed.sliceArray(0 until 32)
diff --git a/apollo/src/appleMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt b/apollo/src/appleMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
index 6a37c7c02..abe1c348a 100644
--- a/apollo/src/appleMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
+++ b/apollo/src/appleMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
@@ -78,7 +78,7 @@ actual class EdHDKey actual constructor(
          */
         actual fun initFromSeed(seed: ByteArray): EdHDKey {
             require(seed.size == 64) {
-                "Seed expected byte length to be ${ECConfig.PRIVATE_KEY_BYTE_SIZE}"
+                "Seed expected byte length to be ${ECConfig.SEED_BYTE_SIZE}"
             }
 
             val keySlice = seed.sliceArray(0 until 32)
diff --git a/apollo/src/commonMain/kotlin/org/hyperledger/identus/apollo/derivation/HDKey.kt b/apollo/src/commonMain/kotlin/org/hyperledger/identus/apollo/derivation/HDKey.kt
index 2e1a2f67a..89f438749 100644
--- a/apollo/src/commonMain/kotlin/org/hyperledger/identus/apollo/derivation/HDKey.kt
+++ b/apollo/src/commonMain/kotlin/org/hyperledger/identus/apollo/derivation/HDKey.kt
@@ -107,7 +107,7 @@ class HDKey(
         childIndex = childIndex
     ) {
         require(seed.size == 64) {
-            "Seed expected byte length to be ${ECConfig.PRIVATE_KEY_BYTE_SIZE}"
+            "Seed expected byte length to be ${ECConfig.SEED_BYTE_SIZE}"
         }
     }
 
@@ -127,7 +127,7 @@ class HDKey(
         childIndex = BigIntegerWrapper(childIndex)
     ) {
         require(seed.size == 64) {
-            "Seed expected byte length to be ${ECConfig.PRIVATE_KEY_BYTE_SIZE}"
+            "Seed expected byte length to be ${ECConfig.SEED_BYTE_SIZE}"
         }
     }
 
diff --git a/apollo/src/commonMain/kotlin/org/hyperledger/identus/apollo/utils/ECConfig.kt b/apollo/src/commonMain/kotlin/org/hyperledger/identus/apollo/utils/ECConfig.kt
index 00c280752..b57d6976f 100644
--- a/apollo/src/commonMain/kotlin/org/hyperledger/identus/apollo/utils/ECConfig.kt
+++ b/apollo/src/commonMain/kotlin/org/hyperledger/identus/apollo/utils/ECConfig.kt
@@ -11,6 +11,7 @@ import kotlin.js.JsExport
 @JsExport
 object ECConfig {
     val PRIVATE_KEY_BYTE_SIZE: Int = 32
+    val SEED_BYTE_SIZE: Int = 64
     internal val PUBLIC_KEY_COORDINATE_BYTE_SIZE: Int = 32
     internal val PUBLIC_KEY_COMPRESSED_BYTE_SIZE: Int = PUBLIC_KEY_COORDINATE_BYTE_SIZE + 1
     val SIGNATURE_MAX_BYTE_SIZE: Int = 72
diff --git a/apollo/src/jsMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt b/apollo/src/jsMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
index 0b3350699..c9aaae5fb 100644
--- a/apollo/src/jsMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
+++ b/apollo/src/jsMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
@@ -72,7 +72,7 @@ actual class EdHDKey actual constructor(
          */
         actual fun initFromSeed(seed: ByteArray): EdHDKey {
             require(seed.size == 64) {
-                "Seed expected byte length to be ${ECConfig.PRIVATE_KEY_BYTE_SIZE}"
+                "Seed expected byte length to be ${ECConfig.SEED_BYTE_SIZE}"
             }
 
             val key = seed.sliceArray(0 until 32)
diff --git a/apollo/src/jvmMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt b/apollo/src/jvmMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
index 6a37c7c02..abe1c348a 100644
--- a/apollo/src/jvmMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
+++ b/apollo/src/jvmMain/kotlin/org/hyperledger/identus/apollo/derivation/EdHDKey.kt
@@ -78,7 +78,7 @@ actual class EdHDKey actual constructor(
          */
         actual fun initFromSeed(seed: ByteArray): EdHDKey {
             require(seed.size == 64) {
-                "Seed expected byte length to be ${ECConfig.PRIVATE_KEY_BYTE_SIZE}"
+                "Seed expected byte length to be ${ECConfig.SEED_BYTE_SIZE}"
             }
 
             val keySlice = seed.sliceArray(0 until 32)