diff --git a/CHANGES.md b/CHANGES.md
index da27d0a0e1..33258e3b85 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -5,10 +5,10 @@ Features ✨:
  -
 
 Improvements 🙌:
- -
+ - Add support for `/plain` command (#12)
 
 Bugfix 🐛:
- -
+ - Fix crash on attachment preview screen (#1088)
 
 Translations 🗣:
  -
@@ -21,6 +21,7 @@ Build 🧱:
 
 Other changes:
  - Restore availability to Chromebooks (#932)
+ - Add a [documentation](./docs/integration_tests.md) to run integration tests
 
 Changes in RiotX 0.17.0 (2020-02-27)
 ===================================================
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8e08a921fb..176a6ee9c1 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -82,6 +82,8 @@ Make sure the following commands execute without any error:
 RiotX is currently supported on Android KitKat (API 19+): please test your change on an Android device (or Android emulator) running with API 19. Many issues can happen (including crashes) on older devices.
 Also, if possible, please test your change on a real device. Testing on Android emulator may not be sufficient.
 
+You should consider adding Unit tests with your PR, and also integration tests (AndroidTest). Please refer to [this document](./docs/integration_tests.md) to install and run the integration test environment.
+
 ### Internationalisation
 
 When adding new string resources, please only add new entries in file `value/strings.xml`. Translations will be added later by the community of translators with a specific tool named [Weblate](https://translate.riot.im/projects/riot-android/).
diff --git a/docs/integration_tests.md b/docs/integration_tests.md
new file mode 100644
index 0000000000..f7557a87a2
--- /dev/null
+++ b/docs/integration_tests.md
@@ -0,0 +1,97 @@
+# Integration tests
+
+Integration tests are useful to ensure that the code works well for any use cases.
+
+They can also be used as sample on how to use the Matrix SDK.
+
+In a ideal world, every API of the SDK should be covered by integration tests. For the moment, we have test mainly for the Crypto part, which is the tricky part. But it covers quite a lot of features: accounts creation, login to existing account, send encrypted messages, keys backup, verification, etc.
+
+The Matrix SDK is able to open multiple sessions, for the same user, of for different users. This way we can test communication between several sessions on a single device.
+
+## Pre requirements
+
+Integration tests need a homeserver running on localhost.
+
+The documentation describes what we do to have one, using [Synapse](https://github.com/matrix-org/synapse/), which is the Matrix reference homeserver.
+
+## Install and run Synapse
+
+Steps:
+
+- Install virtualenv
+
+```bash
+python3 -m pip install virtualenv
+```
+
+- Clone Synapse repository
+
+```bash
+git clone -b develop https://github.com/matrix-org/synapse.git
+```
+or
+```bash
+git clone -b develop git@github.com:matrix-org/synapse.git
+```
+
+You should have the develop branch cloned by default.
+
+- Run synapse, from the Synapse folder you just cloned
+
+```bash
+virtualenv -p python3 env
+source env/bin/activate
+pip install -e .
+demo/start.sh --no-rate-limit
+```
+
+Alternatively, to install the latest Synapse release package (and not a cloned branch) you can run the following instead of `pip install -e .`:
+
+```bash
+pip install matrix-synapse
+```
+
+You should now have 3 running federated Synapse instances 🎉, at http://127.0.0.1:8080/, http://127.0.0.1:8081/ and  http://127.0.0.1:8082/, which should display a "It Works! Synapse is running" message.
+
+## Run the test
+
+It's recommended to run tests using an Android Emulator and not a real device. First reason for that is that the tests will use http://10.0.2.2:8080 to connect to Synapse, which run locally on your machine.
+
+You can run all the tests in the `androidTest` folders.
+
+## Stop Synapse
+
+To stop Synapse, you can run the following commands:
+
+```bash
+./demo/stop.sh
+```
+
+And you can deactivate the virtualenv:
+
+```bash
+deactivate
+```
+
+## Troubleshoot
+
+You'll need python3 to be able to run synapse
+
+### Android Emulator does cannot reach the homeserver
+
+Try on the Emulator browser to open "http://10.0.2.2:8080". You should see the "Synapse is running" message.
+
+### virtualenv command fails
+
+You can try using
+```bash
+python3 -m venv env
+```
+or
+```bash
+python3 -m virtualenv env
+```
+instead of
+```bash
+virtualenv -p python3 env
+```
diff --git a/matrix-sdk-android/src/androidTest/java/im/vector/matrix/android/internal/crypto/crosssigning/ExtensionsKtTest.kt b/matrix-sdk-android/src/androidTest/java/im/vector/matrix/android/internal/crypto/crosssigning/ExtensionsKtTest.kt
new file mode 100644
index 0000000000..84da654c4c
--- /dev/null
+++ b/matrix-sdk-android/src/androidTest/java/im/vector/matrix/android/internal/crypto/crosssigning/ExtensionsKtTest.kt
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2020 New Vector Ltd
+ *
+ * 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 im.vector.matrix.android.internal.crypto.crosssigning
+
+import org.amshove.kluent.shouldBeNull
+import org.amshove.kluent.shouldBeTrue
+import org.junit.Test
+
+@Suppress("SpellCheckingInspection")
+class ExtensionsKtTest {
+
+    @Test
+    fun testComparingBase64StringWithOrWithoutPadding() {
+        // Without padding
+        "NMJyumnhMic".fromBase64().contentEquals("NMJyumnhMic".fromBase64()).shouldBeTrue()
+        // With padding
+        "NMJyumnhMic".fromBase64().contentEquals("NMJyumnhMic=".fromBase64()).shouldBeTrue()
+    }
+
+    @Test
+    fun testBadBase64() {
+        "===".fromBase64Safe().shouldBeNull()
+    }
+}
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/securestorage/SharedSecretStorageError.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/securestorage/SharedSecretStorageError.kt
index abd12789a5..a6bf75f2c0 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/securestorage/SharedSecretStorageError.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/securestorage/SharedSecretStorageError.kt
@@ -28,5 +28,7 @@ sealed class SharedSecretStorageError(message: String?) : Throwable(message) {
     object BadKeyFormat : SharedSecretStorageError("Bad Key Format")
     object ParsingError : SharedSecretStorageError("parsing Error")
     object BadMac : SharedSecretStorageError("Bad mac")
+    object BadCipherText : SharedSecretStorageError("Bad cipher text")
+
     data class OtherError(val reason: Throwable) : SharedSecretStorageError(reason.localizedMessage)
 }
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/crosssigning/DefaultCrossSigningService.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/crosssigning/DefaultCrossSigningService.kt
index a29f27ddd6..acc9f4134d 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/crosssigning/DefaultCrossSigningService.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/crosssigning/DefaultCrossSigningService.kt
@@ -80,7 +80,7 @@ internal class DefaultCrossSigningService @Inject constructor(
 
                 cryptoStore.getCrossSigningPrivateKeys()?.let { privateKeysInfo ->
                     privateKeysInfo.master
-                            ?.fromBase64NoPadding()
+                            ?.fromBase64()
                             ?.let { privateKeySeed ->
                                 val pkSigning = OlmPkSigning()
                                 if (pkSigning.initWithSeed(privateKeySeed) == mxCrossSigningInfo.masterKey()?.unpaddedBase64PublicKey) {
@@ -93,7 +93,7 @@ internal class DefaultCrossSigningService @Inject constructor(
                                 }
                             }
                     privateKeysInfo.user
-                            ?.fromBase64NoPadding()
+                            ?.fromBase64()
                             ?.let { privateKeySeed ->
                                 val pkSigning = OlmPkSigning()
                                 if (pkSigning.initWithSeed(privateKeySeed) == mxCrossSigningInfo.userKey()?.unpaddedBase64PublicKey) {
@@ -106,7 +106,7 @@ internal class DefaultCrossSigningService @Inject constructor(
                                 }
                             }
                     privateKeysInfo.selfSigned
-                            ?.fromBase64NoPadding()
+                            ?.fromBase64()
                             ?.let { privateKeySeed ->
                                 val pkSigning = OlmPkSigning()
                                 if (pkSigning.initWithSeed(privateKeySeed) == mxCrossSigningInfo.selfSigningKey()?.unpaddedBase64PublicKey) {
@@ -307,7 +307,7 @@ internal class DefaultCrossSigningService @Inject constructor(
         var userKeyIsTrusted = false
         var selfSignedKeyIsTrusted = false
 
-        masterKeyPrivateKey?.fromBase64NoPadding()
+        masterKeyPrivateKey?.fromBase64()
                 ?.let { privateKeySeed ->
                     val pkSigning = OlmPkSigning()
                     try {
@@ -324,7 +324,7 @@ internal class DefaultCrossSigningService @Inject constructor(
                     }
                 }
 
-        uskKeyPrivateKey?.fromBase64NoPadding()
+        uskKeyPrivateKey?.fromBase64()
                 ?.let { privateKeySeed ->
                     val pkSigning = OlmPkSigning()
                     try {
@@ -341,7 +341,7 @@ internal class DefaultCrossSigningService @Inject constructor(
                     }
                 }
 
-        sskPrivateKey?.fromBase64NoPadding()
+        sskPrivateKey?.fromBase64()
                 ?.let { privateKeySeed ->
                     val pkSigning = OlmPkSigning()
                     try {
@@ -450,7 +450,7 @@ internal class DefaultCrossSigningService @Inject constructor(
         // 1) check if I know the private key
         val masterPrivateKey = cryptoStore.getCrossSigningPrivateKeys()
                 ?.master
-                ?.fromBase64NoPadding()
+                ?.fromBase64()
 
         var isMaterKeyTrusted = false
         if (myMasterKey.trustLevel?.locallyVerified == true) {
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/crosssigning/Extensions.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/crosssigning/Extensions.kt
index 6ffc341881..fadfb567b3 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/crosssigning/Extensions.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/crosssigning/Extensions.kt
@@ -19,6 +19,7 @@ import android.util.Base64
 import im.vector.matrix.android.internal.crypto.model.CryptoCrossSigningKey
 import im.vector.matrix.android.internal.crypto.model.CryptoDeviceInfo
 import im.vector.matrix.android.internal.util.JsonCanonicalizer
+import timber.log.Timber
 
 fun CryptoDeviceInfo.canonicalSignable(): String {
     return JsonCanonicalizer.getCanonicalJson(Map::class.java, signalableJSONDictionary())
@@ -32,6 +33,18 @@ fun ByteArray.toBase64NoPadding(): String {
     return Base64.encodeToString(this, Base64.NO_PADDING or Base64.NO_WRAP)
 }
 
-fun String.fromBase64NoPadding(): ByteArray {
-    return Base64.decode(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
+ */
+fun String.fromBase64Safe(): ByteArray? {
+    return try {
+        Base64.decode(this, Base64.DEFAULT)
+    } catch (throwable: Throwable) {
+        Timber.e(throwable, "Unable to decode base64 string")
+        null
+    }
 }
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/secrets/DefaultSharedSecretStorageService.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/secrets/DefaultSharedSecretStorageService.kt
index 9627492dc7..649f60887d 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/secrets/DefaultSharedSecretStorageService.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/secrets/DefaultSharedSecretStorageService.kt
@@ -35,7 +35,7 @@ import im.vector.matrix.android.api.session.securestorage.SsssKeySpec
 import im.vector.matrix.android.api.session.securestorage.SsssPassphrase
 import im.vector.matrix.android.internal.crypto.SSSS_ALGORITHM_AES_HMAC_SHA2
 import im.vector.matrix.android.internal.crypto.SSSS_ALGORITHM_CURVE25519_AES_SHA2
-import im.vector.matrix.android.internal.crypto.crosssigning.fromBase64NoPadding
+import im.vector.matrix.android.internal.crypto.crosssigning.fromBase64
 import im.vector.matrix.android.internal.crypto.crosssigning.toBase64NoPadding
 import im.vector.matrix.android.internal.crypto.keysbackup.generatePrivateKeyWithPassword
 import im.vector.matrix.android.internal.crypto.keysbackup.util.computeRecoveryKey
@@ -268,7 +268,7 @@ internal class DefaultSharedSecretStorageService @Inject constructor(
         val ivParameterSpec = IvParameterSpec(iv)
         cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivParameterSpec)
         // secret are not that big, just do Final
-        val cipherBytes = cipher.doFinal(clearDataBase64.fromBase64NoPadding())
+        val cipherBytes = cipher.doFinal(clearDataBase64.fromBase64())
         require(cipherBytes.isNotEmpty())
 
         val macKeySpec = SecretKeySpec(macKey, "HmacSHA256")
@@ -295,9 +295,9 @@ internal class DefaultSharedSecretStorageService @Inject constructor(
         val aesKey = pseudoRandomKey.copyOfRange(0, 32)
         val macKey = pseudoRandomKey.copyOfRange(32, 64)
 
-        val iv = cipherContent.initializationVector?.fromBase64NoPadding() ?: ByteArray(16)
+        val iv = cipherContent.initializationVector?.fromBase64() ?: ByteArray(16)
 
-        val cipherRawBytes = cipherContent.ciphertext!!.fromBase64NoPadding()
+        val cipherRawBytes = cipherContent.ciphertext?.fromBase64() ?: throw SharedSecretStorageError.BadCipherText
 
         val cipher = Cipher.getInstance("AES/CTR/NoPadding")
 
@@ -314,7 +314,7 @@ internal class DefaultSharedSecretStorageService @Inject constructor(
         val mac = Mac.getInstance("HmacSHA256").apply { init(macKeySpec) }
         val digest = mac.doFinal(cipherRawBytes)
 
-        if (!cipherContent.mac?.fromBase64NoPadding()?.contentEquals(digest).orFalse()) {
+        if (!cipherContent.mac?.fromBase64()?.contentEquals(digest).orFalse()) {
             throw SharedSecretStorageError.BadMac
         } else {
             // we are good
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SASDefaultVerificationTransaction.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SASDefaultVerificationTransaction.kt
index 7856e571eb..f56e414a26 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SASDefaultVerificationTransaction.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/SASDefaultVerificationTransaction.kt
@@ -299,14 +299,21 @@ internal abstract class SASDefaultVerificationTransaction(
         }
 
         // If not me sign his MSK and upload the signature
-        if (otherMasterKeyIsVerified && otherUserId != userId) {
+        if (otherMasterKeyIsVerified) {
             // we should trust this master key
             // And check verification MSK -> SSK?
-            crossSigningService.trustUser(otherUserId, object : MatrixCallback<Unit> {
-                override fun onFailure(failure: Throwable) {
-                    Timber.e(failure, "## SAS Verification: Failed to trust User $otherUserId")
+            if (otherUserId != userId) {
+                crossSigningService.trustUser(otherUserId, object : MatrixCallback<Unit> {
+                    override fun onFailure(failure: Throwable) {
+                        Timber.e(failure, "## SAS Verification: Failed to trust User $otherUserId")
+                    }
+                })
+            } else {
+                // Notice other master key is mine because other is me
+                if (otherMasterKey?.trustLevel?.isVerified() == false) {
+                    crossSigningService.markMyMasterKeyAsTrusted()
                 }
-            })
+            }
         }
 
         if (otherUserId == userId) {
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/qrcode/DefaultQrCodeVerificationTransaction.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/qrcode/DefaultQrCodeVerificationTransaction.kt
index 9c2a40a4e8..241c741757 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/qrcode/DefaultQrCodeVerificationTransaction.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/qrcode/DefaultQrCodeVerificationTransaction.kt
@@ -24,6 +24,8 @@ import im.vector.matrix.android.api.session.crypto.verification.VerificationTxSt
 import im.vector.matrix.android.api.session.events.model.EventType
 import im.vector.matrix.android.internal.crypto.actions.SetDeviceVerificationAction
 import im.vector.matrix.android.internal.crypto.crosssigning.DeviceTrustLevel
+import im.vector.matrix.android.internal.crypto.crosssigning.fromBase64
+import im.vector.matrix.android.internal.crypto.crosssigning.fromBase64Safe
 import im.vector.matrix.android.internal.crypto.store.IMXCryptoStore
 import im.vector.matrix.android.internal.crypto.verification.DefaultVerificationTransaction
 import im.vector.matrix.android.internal.crypto.verification.VerificationInfo
@@ -199,7 +201,7 @@ internal class DefaultQrCodeVerificationTransaction(
             return
         }
 
-        if (startReq.sharedSecret == qrCodeData.sharedSecret) {
+        if (startReq.sharedSecret?.fromBase64Safe()?.contentEquals(qrCodeData.sharedSecret.fromBase64()) == true) {
             // Ok, we can trust the other user
             // We can only trust the master key in this case
             // But first, ask the user for a confirmation
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/qrcode/Extensions.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/qrcode/Extensions.kt
index da926a0e10..a4c4e649cc 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/qrcode/Extensions.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/verification/qrcode/Extensions.kt
@@ -16,7 +16,7 @@
 
 package im.vector.matrix.android.internal.crypto.verification.qrcode
 
-import im.vector.matrix.android.internal.crypto.crosssigning.fromBase64NoPadding
+import im.vector.matrix.android.internal.crypto.crosssigning.fromBase64
 import im.vector.matrix.android.internal.crypto.crosssigning.toBase64NoPadding
 import im.vector.matrix.android.internal.extensions.toUnsignedInt
 
@@ -52,15 +52,15 @@ fun QrCodeData.toEncodedString(): String {
     }
 
     // Keys
-    firstKey.fromBase64NoPadding().forEach {
+    firstKey.fromBase64().forEach {
         result += it
     }
-    secondKey.fromBase64NoPadding().forEach {
+    secondKey.fromBase64().forEach {
         result += it
     }
 
     // Secret
-    sharedSecret.fromBase64NoPadding().forEach {
+    sharedSecret.fromBase64().forEach {
         result += it
     }
 
@@ -94,11 +94,11 @@ fun String.toQrCodeData(): QrCodeData? {
     val mode = byteArray[cursor].toInt()
     cursor++
 
-    // Get transaction length
-    val bigEndian1 = byteArray[cursor].toUnsignedInt()
-    val bigEndian2 = byteArray[cursor + 1].toUnsignedInt()
+    // Get transaction length, Big Endian format
+    val msb = byteArray[cursor].toUnsignedInt()
+    val lsb = byteArray[cursor + 1].toUnsignedInt()
 
-    val transactionLength = bigEndian1 * 0x0100 + bigEndian2
+    val transactionLength = msb.shl(8) + lsb
 
     cursor++
     cursor++
diff --git a/vector/src/main/java/im/vector/riotx/features/attachments/preview/AttachmentsPreviewFragment.kt b/vector/src/main/java/im/vector/riotx/features/attachments/preview/AttachmentsPreviewFragment.kt
index 1d525dddf7..e52b497df4 100644
--- a/vector/src/main/java/im/vector/riotx/features/attachments/preview/AttachmentsPreviewFragment.kt
+++ b/vector/src/main/java/im/vector/riotx/features/attachments/preview/AttachmentsPreviewFragment.kt
@@ -39,6 +39,7 @@ import com.airbnb.mvrx.fragmentViewModel
 import com.airbnb.mvrx.withState
 import com.yalantis.ucrop.UCrop
 import com.yalantis.ucrop.UCropActivity
+import im.vector.matrix.android.api.extensions.orFalse
 import im.vector.matrix.android.api.session.content.ContentAttachmentData
 import im.vector.riotx.R
 import im.vector.riotx.core.extensions.cleanup
@@ -115,7 +116,7 @@ class AttachmentsPreviewFragment @Inject constructor(
     override fun onPrepareOptionsMenu(menu: Menu) {
         withState(viewModel) { state ->
             val editMenuItem = menu.findItem(R.id.attachmentsPreviewEditAction)
-            val showEditMenuItem = state.attachments[state.currentAttachmentIndex].isEditable()
+            val showEditMenuItem = state.attachments.getOrNull(state.currentAttachmentIndex)?.isEditable().orFalse()
             editMenuItem.setVisible(showEditMenuItem)
         }
 
diff --git a/vector/src/main/java/im/vector/riotx/features/command/Command.kt b/vector/src/main/java/im/vector/riotx/features/command/Command.kt
index f39f1cb7cd..72f686c2c8 100644
--- a/vector/src/main/java/im/vector/riotx/features/command/Command.kt
+++ b/vector/src/main/java/im/vector/riotx/features/command/Command.kt
@@ -43,6 +43,7 @@ enum class Command(val command: String, val parameters: String, @StringRes val d
     SPOILER("/spoiler", "<message>", R.string.command_description_spoiler),
     POLL("/poll", "Question | Option 1 | Option 2 ...", R.string.command_description_poll),
     SHRUG("/shrug", "<message>", R.string.command_description_shrug),
+    PLAIN("/plain", "<message>", R.string.command_description_plain),
     // TODO temporary command
     VERIFY_USER("/verify", "<user-id>", R.string.command_description_verify);
 
diff --git a/vector/src/main/java/im/vector/riotx/features/command/CommandParser.kt b/vector/src/main/java/im/vector/riotx/features/command/CommandParser.kt
index abc047e273..875fe92610 100644
--- a/vector/src/main/java/im/vector/riotx/features/command/CommandParser.kt
+++ b/vector/src/main/java/im/vector/riotx/features/command/CommandParser.kt
@@ -57,6 +57,15 @@ object CommandParser {
             }
 
             return when (val slashCommand = messageParts.first()) {
+                Command.PLAIN.command                  -> {
+                    val text = textMessage.substring(Command.PLAIN.command.length).trim()
+
+                    if (text.isNotEmpty()) {
+                        ParsedCommand.SendPlainText(text)
+                    } else {
+                        ParsedCommand.ErrorSyntax(Command.PLAIN)
+                    }
+                }
                 Command.CHANGE_DISPLAY_NAME.command    -> {
                     val newDisplayName = textMessage.substring(Command.CHANGE_DISPLAY_NAME.command.length).trim()
 
diff --git a/vector/src/main/java/im/vector/riotx/features/command/ParsedCommand.kt b/vector/src/main/java/im/vector/riotx/features/command/ParsedCommand.kt
index d823429ac9..e4fee27ee6 100644
--- a/vector/src/main/java/im/vector/riotx/features/command/ParsedCommand.kt
+++ b/vector/src/main/java/im/vector/riotx/features/command/ParsedCommand.kt
@@ -33,6 +33,7 @@ sealed class ParsedCommand {
 
     // Valid commands:
 
+    class SendPlainText(val message: CharSequence) : ParsedCommand()
     class SendEmote(val message: CharSequence) : ParsedCommand()
     class SendRainbow(val message: CharSequence) : ParsedCommand()
     class SendRainbowEmote(val message: CharSequence) : ParsedCommand()
diff --git a/vector/src/main/java/im/vector/riotx/features/crypto/verification/VerificationBottomSheetViewModel.kt b/vector/src/main/java/im/vector/riotx/features/crypto/verification/VerificationBottomSheetViewModel.kt
index bda483d6ef..d161f6d6fc 100644
--- a/vector/src/main/java/im/vector/riotx/features/crypto/verification/VerificationBottomSheetViewModel.kt
+++ b/vector/src/main/java/im/vector/riotx/features/crypto/verification/VerificationBottomSheetViewModel.kt
@@ -42,7 +42,7 @@ import im.vector.matrix.android.api.session.events.model.LocalEcho
 import im.vector.matrix.android.api.session.room.model.create.CreateRoomParams
 import im.vector.matrix.android.api.util.MatrixItem
 import im.vector.matrix.android.api.util.toMatrixItem
-import im.vector.matrix.android.internal.crypto.crosssigning.fromBase64NoPadding
+import im.vector.matrix.android.internal.crypto.crosssigning.fromBase64
 import im.vector.matrix.android.internal.crypto.crosssigning.isVerified
 import im.vector.matrix.android.internal.crypto.verification.PendingVerificationRequest
 import im.vector.riotx.core.extensions.exhaustive
@@ -274,7 +274,7 @@ class VerificationBottomSheetViewModel @AssistedInject constructor(
             }
             is VerificationAction.GotResultFromSsss            -> {
                 try {
-                    action.cypherData.fromBase64NoPadding().inputStream().use { ins ->
+                    action.cypherData.fromBase64().inputStream().use { ins ->
                         val res = session.loadSecureSecret<Map<String, String>>(ins, action.alias)
                         val trustResult = session.cryptoService().crossSigningService().checkTrustFromPrivateKeys(
                                 res?.get(MASTER_KEY_SSSS_NAME),
diff --git a/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt b/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt
index f98dd1ae5c..4ab9125c4f 100644
--- a/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt
+++ b/vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt
@@ -342,6 +342,12 @@ class RoomDetailViewModel @AssistedInject constructor(
                         is ParsedCommand.ErrorUnknownSlashCommand -> {
                             _viewEvents.post(RoomDetailViewEvents.SlashCommandUnknown(slashCommandResult.slashCommand))
                         }
+                        is ParsedCommand.SendPlainText            -> {
+                            // Send the text message to the room, without markdown
+                            room.sendTextMessage(slashCommandResult.message, autoMarkdown = false)
+                            _viewEvents.post(RoomDetailViewEvents.MessageSent)
+                            popDraft()
+                        }
                         is ParsedCommand.Invite                   -> {
                             handleInviteSlashCommand(slashCommandResult)
                             popDraft()
diff --git a/vector/src/main/res/values/strings_riotX.xml b/vector/src/main/res/values/strings_riotX.xml
index 00bf65e121..69d821c0ca 100644
--- a/vector/src/main/res/values/strings_riotX.xml
+++ b/vector/src/main/res/values/strings_riotX.xml
@@ -26,7 +26,7 @@
 
 
     <!-- BEGIN Strings added by Others -->
-
+    <string name="command_description_plain">Sends a message as plain text, without interpreting it as markdown</string>
     <!-- END Strings added by Others -->
 
 </resources>