diff --git a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/crosssigning/ExtensionsKtTest.kt b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/crosssigning/ExtensionsKtTest.kt
index 9fa7458ea7..936dc6a872 100644
--- a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/crosssigning/ExtensionsKtTest.kt
+++ b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/crosssigning/ExtensionsKtTest.kt
@@ -19,6 +19,7 @@ package org.matrix.android.sdk.internal.crypto.crosssigning
 import org.amshove.kluent.shouldBeNull
 import org.amshove.kluent.shouldBeTrue
 import org.junit.Test
+import org.matrix.android.sdk.api.util.fromBase64
 
 @Suppress("SpellCheckingInspection")
 class ExtensionsKtTest {
diff --git a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/ssss/QuadSTests.kt b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/ssss/QuadSTests.kt
index 67f17727b1..84bde88449 100644
--- a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/ssss/QuadSTests.kt
+++ b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/ssss/QuadSTests.kt
@@ -37,11 +37,11 @@ import org.matrix.android.sdk.api.session.securestorage.SharedSecretStorageError
 import org.matrix.android.sdk.api.session.securestorage.SharedSecretStorageService
 import org.matrix.android.sdk.api.session.securestorage.SsssKeyCreationInfo
 import org.matrix.android.sdk.api.util.Optional
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import org.matrix.android.sdk.common.CommonTestHelper
 import org.matrix.android.sdk.common.SessionTestParams
 import org.matrix.android.sdk.common.TestConstants
 import org.matrix.android.sdk.internal.crypto.SSSS_ALGORITHM_AES_HMAC_SHA2
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
 import org.matrix.android.sdk.internal.crypto.secrets.DefaultSharedSecretStorageService
 
 @RunWith(AndroidJUnit4::class)
diff --git a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/session/securestorage/SecretStoringUtilsTest.kt b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/session/securestorage/SecretStoringUtilsTest.kt
index 7ee6caed0d..6bcd12742b 100644
--- a/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/session/securestorage/SecretStoringUtilsTest.kt
+++ b/matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/session/securestorage/SecretStoringUtilsTest.kt
@@ -24,8 +24,8 @@ import org.junit.Test
 import org.junit.runner.RunWith
 import org.junit.runners.MethodSorters
 import org.matrix.android.sdk.InstrumentedTest
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
+import org.matrix.android.sdk.api.util.fromBase64
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import java.io.ByteArrayOutputStream
 import java.util.UUID
 
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/util/Base64.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/util/Base64.kt
new file mode 100644
index 0000000000..e0596c1325
--- /dev/null
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/util/Base64.kt
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2022 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.api.util
+
+import android.util.Base64
+
+fun ByteArray.toBase64NoPadding(): String {
+    return Base64.encodeToString(this, Base64.NO_PADDING or Base64.NO_WRAP)
+}
+
+fun String.fromBase64(): ByteArray {
+    return Base64.decode(this, Base64.DEFAULT)
+}
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/IncomingGossipingRequestManager.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/IncomingGossipingRequestManager.kt
index aba1e29834..5ea7b81114 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/IncomingGossipingRequestManager.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/IncomingGossipingRequestManager.kt
@@ -30,8 +30,8 @@ import org.matrix.android.sdk.api.session.crypto.keyshare.GossipingRequestListen
 import org.matrix.android.sdk.api.session.events.model.Event
 import org.matrix.android.sdk.api.session.events.model.EventType
 import org.matrix.android.sdk.api.session.events.model.toModel
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import org.matrix.android.sdk.internal.crypto.algorithms.IMXGroupEncryption
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
 import org.matrix.android.sdk.internal.crypto.model.rest.GossipingDefaultContent
 import org.matrix.android.sdk.internal.crypto.model.rest.GossipingToDeviceObject
 import org.matrix.android.sdk.internal.crypto.model.rest.RoomKeyRequestBody
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/crosssigning/DefaultCrossSigningService.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/crosssigning/DefaultCrossSigningService.kt
index 5e00f388f5..a86ace0134 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/crosssigning/DefaultCrossSigningService.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/crosssigning/DefaultCrossSigningService.kt
@@ -36,6 +36,7 @@ import org.matrix.android.sdk.api.session.crypto.crosssigning.MXCrossSigningInfo
 import org.matrix.android.sdk.api.session.crypto.crosssigning.PrivateKeysInfo
 import org.matrix.android.sdk.api.session.crypto.model.CryptoDeviceInfo
 import org.matrix.android.sdk.api.util.Optional
+import org.matrix.android.sdk.api.util.fromBase64
 import org.matrix.android.sdk.internal.crypto.DeviceListManager
 import org.matrix.android.sdk.internal.crypto.model.rest.UploadSignatureQueryBuilder
 import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/crosssigning/Extensions.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/crosssigning/Extensions.kt
index 8c515eb55f..1c49e2c2e3 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/crosssigning/Extensions.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/crosssigning/Extensions.kt
@@ -29,14 +29,6 @@ internal fun CryptoCrossSigningKey.canonicalSignable(): String {
     return JsonCanonicalizer.getCanonicalJson(Map::class.java, signalableJSONDictionary())
 }
 
-fun ByteArray.toBase64NoPadding(): String {
-    return Base64.encodeToString(this, Base64.NO_PADDING or Base64.NO_WRAP)
-}
-
-fun String.fromBase64(): ByteArray {
-    return Base64.decode(this, Base64.DEFAULT)
-}
-
 /**
  * Decode the base 64. Return null in case of bad format. Should be used when parsing received data from external source
  */
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/keysbackup/DefaultKeysBackupService.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/keysbackup/DefaultKeysBackupService.kt
index 4f951b112d..2f3a945337 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/keysbackup/DefaultKeysBackupService.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/keysbackup/DefaultKeysBackupService.kt
@@ -39,12 +39,12 @@ import org.matrix.android.sdk.api.session.crypto.keysbackup.SavedKeyBackupKeyInf
 import org.matrix.android.sdk.api.session.crypto.keysbackup.computeRecoveryKey
 import org.matrix.android.sdk.api.session.crypto.keysbackup.extractCurveKeyFromRecoveryKey
 import org.matrix.android.sdk.api.util.awaitCallback
+import org.matrix.android.sdk.api.util.fromBase64
 import org.matrix.android.sdk.internal.crypto.MXCRYPTO_ALGORITHM_MEGOLM_BACKUP
 import org.matrix.android.sdk.internal.crypto.MXOlmDevice
 import org.matrix.android.sdk.internal.crypto.MegolmSessionData
 import org.matrix.android.sdk.internal.crypto.ObjectSigner
 import org.matrix.android.sdk.internal.crypto.actions.MegolmSessionDataImporter
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.KeysBackupLastVersionResult
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.KeysBackupVersionTrust
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.KeysBackupVersionTrustSignature
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/secrets/DefaultSharedSecretStorageService.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/secrets/DefaultSharedSecretStorageService.kt
index c25573fea3..cf54374ca5 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/secrets/DefaultSharedSecretStorageService.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/secrets/DefaultSharedSecretStorageService.kt
@@ -36,11 +36,11 @@ import org.matrix.android.sdk.api.session.securestorage.SharedSecretStorageServi
 import org.matrix.android.sdk.api.session.securestorage.SsssKeyCreationInfo
 import org.matrix.android.sdk.api.session.securestorage.SsssKeySpec
 import org.matrix.android.sdk.api.session.securestorage.SsssPassphrase
+import org.matrix.android.sdk.api.util.fromBase64
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import org.matrix.android.sdk.internal.crypto.OutgoingGossipingRequestManager
 import org.matrix.android.sdk.internal.crypto.SSSS_ALGORITHM_AES_HMAC_SHA2
 import org.matrix.android.sdk.internal.crypto.SSSS_ALGORITHM_CURVE25519_AES_SHA2
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
 import org.matrix.android.sdk.internal.crypto.keysbackup.generatePrivateKeyWithPassword
 import org.matrix.android.sdk.internal.crypto.tools.HkdfSha256
 import org.matrix.android.sdk.internal.crypto.tools.withOlmDecryption
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/tasks/InitializeCrossSigningTask.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/tasks/InitializeCrossSigningTask.kt
index e2fd54f0d8..f33b1cdf1b 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/tasks/InitializeCrossSigningTask.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/tasks/InitializeCrossSigningTask.kt
@@ -18,11 +18,11 @@ package org.matrix.android.sdk.internal.crypto.tasks
 
 import dagger.Lazy
 import org.matrix.android.sdk.api.auth.UserInteractiveAuthInterceptor
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import org.matrix.android.sdk.internal.auth.registration.handleUIA
 import org.matrix.android.sdk.internal.crypto.MXOlmDevice
 import org.matrix.android.sdk.internal.crypto.MyDeviceInfoHolder
 import org.matrix.android.sdk.internal.crypto.crosssigning.canonicalSignable
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
 import org.matrix.android.sdk.internal.crypto.model.CryptoCrossSigningKey
 import org.matrix.android.sdk.internal.crypto.model.KeyUsage
 import org.matrix.android.sdk.internal.crypto.model.rest.UploadSignatureQueryBuilder
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/DefaultQrCodeVerificationTransaction.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/DefaultQrCodeVerificationTransaction.kt
index 90ede18dc8..06f0b36798 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/DefaultQrCodeVerificationTransaction.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/DefaultQrCodeVerificationTransaction.kt
@@ -21,10 +21,10 @@ import org.matrix.android.sdk.api.session.crypto.verification.CancelCode
 import org.matrix.android.sdk.api.session.crypto.verification.QrCodeVerificationTransaction
 import org.matrix.android.sdk.api.session.crypto.verification.VerificationTxState
 import org.matrix.android.sdk.api.session.events.model.EventType
+import org.matrix.android.sdk.api.util.fromBase64
 import org.matrix.android.sdk.internal.crypto.IncomingGossipingRequestManager
 import org.matrix.android.sdk.internal.crypto.OutgoingGossipingRequestManager
 import org.matrix.android.sdk.internal.crypto.actions.SetDeviceVerificationAction
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
 import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64Safe
 import org.matrix.android.sdk.internal.crypto.store.IMXCryptoStore
 import org.matrix.android.sdk.internal.crypto.verification.DefaultVerificationTransaction
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/Extensions.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/Extensions.kt
index 76e88442b6..b84befee66 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/Extensions.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/Extensions.kt
@@ -16,8 +16,8 @@
 
 package org.matrix.android.sdk.internal.crypto.verification.qrcode
 
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
+import org.matrix.android.sdk.api.util.fromBase64
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import org.matrix.android.sdk.internal.extensions.toUnsignedInt
 
 // MATRIX
diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/SharedSecret.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/SharedSecret.kt
index e4935bcada..52b09be49c 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/SharedSecret.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/verification/qrcode/SharedSecret.kt
@@ -16,7 +16,7 @@
 
 package org.matrix.android.sdk.internal.crypto.verification.qrcode
 
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import java.security.SecureRandom
 
 internal fun generateSharedSecretV2(): String {
diff --git a/vector/src/main/java/im/vector/app/features/auth/ReAuthViewModel.kt b/vector/src/main/java/im/vector/app/features/auth/ReAuthViewModel.kt
index 830fd4e79d..fcc2a59ef8 100644
--- a/vector/src/main/java/im/vector/app/features/auth/ReAuthViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/auth/ReAuthViewModel.kt
@@ -25,7 +25,7 @@ import im.vector.app.core.di.hiltMavericksViewModelFactory
 import im.vector.app.core.platform.VectorViewModel
 import org.matrix.android.sdk.api.auth.data.LoginFlowTypes
 import org.matrix.android.sdk.api.session.Session
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import java.io.ByteArrayOutputStream
 
 class ReAuthViewModel @AssistedInject constructor(
diff --git a/vector/src/main/java/im/vector/app/features/crypto/keysbackup/restore/KeysBackupRestoreSharedViewModel.kt b/vector/src/main/java/im/vector/app/features/crypto/keysbackup/restore/KeysBackupRestoreSharedViewModel.kt
index 6e25e8fd04..85d7e7f4e6 100644
--- a/vector/src/main/java/im/vector/app/features/crypto/keysbackup/restore/KeysBackupRestoreSharedViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/crypto/keysbackup/restore/KeysBackupRestoreSharedViewModel.kt
@@ -33,7 +33,7 @@ import org.matrix.android.sdk.api.session.crypto.keysbackup.KeysBackupService
 import org.matrix.android.sdk.api.session.crypto.keysbackup.computeRecoveryKey
 import org.matrix.android.sdk.api.session.securestorage.KeyInfoResult
 import org.matrix.android.sdk.api.util.awaitCallback
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
+import org.matrix.android.sdk.api.util.fromBase64
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.KeysBackupLastVersionResult
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.rest.KeysVersionResult
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.toKeysVersionResult
diff --git a/vector/src/main/java/im/vector/app/features/crypto/quads/SharedSecureStorageViewModel.kt b/vector/src/main/java/im/vector/app/features/crypto/quads/SharedSecureStorageViewModel.kt
index d324a52242..51d8b3a8d5 100644
--- a/vector/src/main/java/im/vector/app/features/crypto/quads/SharedSecureStorageViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/crypto/quads/SharedSecureStorageViewModel.kt
@@ -41,8 +41,8 @@ import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.securestorage.IntegrityResult
 import org.matrix.android.sdk.api.session.securestorage.KeyInfoResult
 import org.matrix.android.sdk.api.session.securestorage.RawBytesKeySpec
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import org.matrix.android.sdk.flow.flow
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
 import timber.log.Timber
 import java.io.ByteArrayOutputStream
 
diff --git a/vector/src/main/java/im/vector/app/features/crypto/recover/BackupToQuadSMigrationTask.kt b/vector/src/main/java/im/vector/app/features/crypto/recover/BackupToQuadSMigrationTask.kt
index bd11129274..dea450832d 100644
--- a/vector/src/main/java/im/vector/app/features/crypto/recover/BackupToQuadSMigrationTask.kt
+++ b/vector/src/main/java/im/vector/app/features/crypto/recover/BackupToQuadSMigrationTask.kt
@@ -31,7 +31,7 @@ import org.matrix.android.sdk.api.session.securestorage.RawBytesKeySpec
 import org.matrix.android.sdk.api.session.securestorage.SharedSecretStorageService
 import org.matrix.android.sdk.api.session.securestorage.SsssKeyCreationInfo
 import org.matrix.android.sdk.api.util.awaitCallback
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import org.matrix.android.sdk.internal.crypto.keysbackup.deriveKey
 import timber.log.Timber
 import java.util.UUID
diff --git a/vector/src/main/java/im/vector/app/features/crypto/recover/BootstrapCrossSigningTask.kt b/vector/src/main/java/im/vector/app/features/crypto/recover/BootstrapCrossSigningTask.kt
index 83c6f8081b..6e5db4b107 100644
--- a/vector/src/main/java/im/vector/app/features/crypto/recover/BootstrapCrossSigningTask.kt
+++ b/vector/src/main/java/im/vector/app/features/crypto/recover/BootstrapCrossSigningTask.kt
@@ -34,7 +34,7 @@ import org.matrix.android.sdk.api.session.securestorage.SharedSecretStorageServi
 import org.matrix.android.sdk.api.session.securestorage.SsssKeyCreationInfo
 import org.matrix.android.sdk.api.session.securestorage.SsssKeySpec
 import org.matrix.android.sdk.api.util.awaitCallback
-import org.matrix.android.sdk.internal.crypto.crosssigning.toBase64NoPadding
+import org.matrix.android.sdk.api.util.toBase64NoPadding
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.KeysBackupLastVersionResult
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.MegolmBackupCreationInfo
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.rest.KeysVersion
diff --git a/vector/src/main/java/im/vector/app/features/crypto/recover/BootstrapSharedViewModel.kt b/vector/src/main/java/im/vector/app/features/crypto/recover/BootstrapSharedViewModel.kt
index 69e65cdd4d..f47b8f4c37 100644
--- a/vector/src/main/java/im/vector/app/features/crypto/recover/BootstrapSharedViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/crypto/recover/BootstrapSharedViewModel.kt
@@ -46,7 +46,7 @@ import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.crypto.keysbackup.extractCurveKeyFromRecoveryKey
 import org.matrix.android.sdk.api.session.securestorage.RawBytesKeySpec
 import org.matrix.android.sdk.api.util.awaitCallback
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
+import org.matrix.android.sdk.api.util.fromBase64
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.KeysBackupLastVersionResult
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.rest.KeysVersionResult
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.toKeysVersionResult
diff --git a/vector/src/main/java/im/vector/app/features/crypto/verification/VerificationBottomSheetViewModel.kt b/vector/src/main/java/im/vector/app/features/crypto/verification/VerificationBottomSheetViewModel.kt
index b586cb851e..dae7ccb7c5 100644
--- a/vector/src/main/java/im/vector/app/features/crypto/verification/VerificationBottomSheetViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/crypto/verification/VerificationBottomSheetViewModel.kt
@@ -52,8 +52,8 @@ import org.matrix.android.sdk.api.session.crypto.verification.VerificationTxStat
 import org.matrix.android.sdk.api.session.events.model.LocalEcho
 import org.matrix.android.sdk.api.util.MatrixItem
 import org.matrix.android.sdk.api.util.awaitCallback
+import org.matrix.android.sdk.api.util.fromBase64
 import org.matrix.android.sdk.api.util.toMatrixItem
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.KeysBackupLastVersionResult
 import org.matrix.android.sdk.internal.crypto.keysbackup.model.toKeysVersionResult
 import org.matrix.android.sdk.internal.crypto.model.ImportRoomKeysResult
diff --git a/vector/src/main/java/im/vector/app/features/settings/account/deactivation/DeactivateAccountViewModel.kt b/vector/src/main/java/im/vector/app/features/settings/account/deactivation/DeactivateAccountViewModel.kt
index 964219ce23..40c1cd32fe 100644
--- a/vector/src/main/java/im/vector/app/features/settings/account/deactivation/DeactivateAccountViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/settings/account/deactivation/DeactivateAccountViewModel.kt
@@ -31,7 +31,7 @@ import org.matrix.android.sdk.api.auth.UserPasswordAuth
 import org.matrix.android.sdk.api.auth.registration.RegistrationFlowResponse
 import org.matrix.android.sdk.api.failure.isInvalidUIAAuth
 import org.matrix.android.sdk.api.session.Session
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
+import org.matrix.android.sdk.api.util.fromBase64
 import org.matrix.android.sdk.internal.crypto.model.rest.DefaultBaseAuth
 import timber.log.Timber
 import kotlin.coroutines.Continuation
diff --git a/vector/src/main/java/im/vector/app/features/settings/crosssigning/CrossSigningSettingsViewModel.kt b/vector/src/main/java/im/vector/app/features/settings/crosssigning/CrossSigningSettingsViewModel.kt
index 91be554c6f..976d412e3f 100644
--- a/vector/src/main/java/im/vector/app/features/settings/crosssigning/CrossSigningSettingsViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/settings/crosssigning/CrossSigningSettingsViewModel.kt
@@ -38,9 +38,9 @@ import org.matrix.android.sdk.api.auth.registration.nextUncompletedStage
 import org.matrix.android.sdk.api.crypto.crosssigning.isVerified
 import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.flow.flow
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
 import org.matrix.android.sdk.internal.crypto.model.rest.DefaultBaseAuth
 import org.matrix.android.sdk.api.util.awaitCallback
+import org.matrix.android.sdk.api.util.fromBase64
 import timber.log.Timber
 import kotlin.coroutines.Continuation
 import kotlin.coroutines.resume
diff --git a/vector/src/main/java/im/vector/app/features/settings/devices/DevicesViewModel.kt b/vector/src/main/java/im/vector/app/features/settings/devices/DevicesViewModel.kt
index 2f743abdf3..45d09bebb4 100644
--- a/vector/src/main/java/im/vector/app/features/settings/devices/DevicesViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/settings/devices/DevicesViewModel.kt
@@ -60,10 +60,10 @@ import org.matrix.android.sdk.api.session.crypto.verification.VerificationServic
 import org.matrix.android.sdk.api.session.crypto.verification.VerificationTransaction
 import org.matrix.android.sdk.api.session.crypto.verification.VerificationTxState
 import org.matrix.android.sdk.flow.flow
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
 import org.matrix.android.sdk.internal.crypto.model.rest.DefaultBaseAuth
 import org.matrix.android.sdk.internal.crypto.model.rest.DeviceInfo
 import org.matrix.android.sdk.api.util.awaitCallback
+import org.matrix.android.sdk.api.util.fromBase64
 import timber.log.Timber
 import javax.net.ssl.HttpsURLConnection
 import kotlin.coroutines.Continuation
diff --git a/vector/src/main/java/im/vector/app/features/settings/threepids/ThreePidsSettingsViewModel.kt b/vector/src/main/java/im/vector/app/features/settings/threepids/ThreePidsSettingsViewModel.kt
index acbe893d58..686c5ff7f0 100644
--- a/vector/src/main/java/im/vector/app/features/settings/threepids/ThreePidsSettingsViewModel.kt
+++ b/vector/src/main/java/im/vector/app/features/settings/threepids/ThreePidsSettingsViewModel.kt
@@ -36,8 +36,8 @@ import org.matrix.android.sdk.api.auth.UserPasswordAuth
 import org.matrix.android.sdk.api.auth.registration.RegistrationFlowResponse
 import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.identity.ThreePid
+import org.matrix.android.sdk.api.util.fromBase64
 import org.matrix.android.sdk.flow.flow
-import org.matrix.android.sdk.internal.crypto.crosssigning.fromBase64
 import org.matrix.android.sdk.internal.crypto.model.rest.DefaultBaseAuth
 import timber.log.Timber
 import kotlin.coroutines.Continuation