diff --git a/packages/wyatt_authentication_bloc/lib/src/data/data.dart b/packages/wyatt_authentication_bloc/lib/src/data/data.dart
new file mode 100644
index 00000000..42218c55
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/data/data.dart
@@ -0,0 +1,19 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+export 'data_sources/data_sources.dart';
+export 'models/models.dart';
+export 'repositories/repositories.dart';
diff --git a/packages/wyatt_authentication_bloc/lib/src/data/data_sources/data_sources.dart b/packages/wyatt_authentication_bloc/lib/src/data/data_sources/data_sources.dart
new file mode 100644
index 00000000..346c8fa7
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/data/data_sources/data_sources.dart
@@ -0,0 +1,18 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+export 'local/authentication_cache_data_source_impl.dart';
+export 'remote/authentication_firebase_data_source_impl.dart';
diff --git a/packages/wyatt_authentication_bloc/lib/src/data/data_sources/local/authentication_cache_data_source_impl.dart b/packages/wyatt_authentication_bloc/lib/src/data/data_sources/local/authentication_cache_data_source_impl.dart
new file mode 100644
index 00000000..363ee51d
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/data/data_sources/local/authentication_cache_data_source_impl.dart
@@ -0,0 +1,60 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:wyatt_architecture/wyatt_architecture.dart';
+import 'package:wyatt_authentication_bloc/src/domain/data_sources/local/authentication_local_data_source.dart';
+import 'package:wyatt_authentication_bloc/src/domain/entities/account.dart';
+import 'package:wyatt_type_utils/wyatt_type_utils.dart';
+
+class AuthenticationCacheDataSourceImpl<T extends Object>
+    extends AuthenticationLocalDataSource<T> {
+  Account? _account;
+  T? _data;
+
+  AuthenticationCacheDataSourceImpl();
+
+  @override
+  void storeAccount(Account? account) {
+    _account = account;
+  }
+
+  @override
+  void storeData(T? data) {
+    _data = data;
+  }
+
+  @override
+  Account loadAccount() {
+    if (_account.isNotNull) {
+      return _account!;
+    }
+    throw ClientException('Cached account is invalid');
+  }
+
+  @override
+  T loadData() {
+    if (_data.isNotNull) {
+      return _data!;
+    }
+    throw ClientException('Cached data is invalid');
+  }
+
+  @override
+  void destroy() {
+    _data = null;
+    _account = null;
+  }
+}
diff --git a/packages/wyatt_authentication_bloc/lib/src/data/data_sources/remote/authentication_firebase_data_source_impl.dart b/packages/wyatt_authentication_bloc/lib/src/data/data_sources/remote/authentication_firebase_data_source_impl.dart
new file mode 100644
index 00000000..f0c55b8d
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/data/data_sources/remote/authentication_firebase_data_source_impl.dart
@@ -0,0 +1,110 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:firebase_auth/firebase_auth.dart';
+import 'package:wyatt_architecture/wyatt_architecture.dart';
+import 'package:wyatt_authentication_bloc/wyatt_authentication_bloc.dart';
+import 'package:wyatt_type_utils/wyatt_type_utils.dart';
+
+class AuthenticationFirebaseDataSourceImpl
+    extends AuthenticationRemoteDataSource {
+  final FirebaseAuth _firebaseAuth;
+
+  AuthenticationFirebaseDataSourceImpl({FirebaseAuth? firebaseAuth})
+      : _firebaseAuth = firebaseAuth ?? FirebaseAuth.instance;
+
+  Account _mapper(User user) => AccountModel(
+        uid: user.uid,
+        email: user.email,
+      );
+
+  @override
+  Future<Account> signInWithEmailAndPassword({
+    required String email,
+    required String password,
+  }) async {
+    try {
+      final userCredential = await _firebaseAuth.signInWithEmailAndPassword(
+        email: email,
+        password: password,
+      );
+      final user = userCredential.user;
+      if (user.isNotNull) {
+        return _mapper(user!);
+      } else {
+        throw Exception(); // Get caught just after.
+      }
+    } on FirebaseAuthException catch (e) {
+      throw SignInWithEmailAndPasswordFailureFirebase.fromCode(e.code);
+    } catch (_) {
+      throw SignInWithEmailAndPasswordFailureFirebase();
+    }
+  }
+
+  @override
+  Future<Account> signUp({
+    required String email,
+    required String password,
+  }) async {
+    try {
+      final userCredential = await _firebaseAuth.createUserWithEmailAndPassword(
+        email: email,
+        password: password,
+      );
+      final user = userCredential.user;
+      if (user.isNotNull) {
+        return _mapper(user!);
+      } else {
+        throw Exception(); // Get caught just after.
+      }
+    } on FirebaseAuthException catch (e) {
+      throw SignUpWithEmailAndPasswordFailureFirebase.fromCode(e.code);
+    } catch (_) {
+      throw SignUpWithEmailAndPasswordFailureFirebase();
+    }
+  }
+
+  @override
+  Future<void> signOut() async {
+    try {
+      await _firebaseAuth.signOut();
+    } catch (_) {
+      throw SignOutFailureFirebase();
+    }
+  }
+
+  @override
+  Future<String> getIdentityToken() async {
+    try {
+      final token = await _firebaseAuth.currentUser?.getIdToken();
+      if (token.isNotNull) {
+        return token!;
+      } else {
+        throw Exception(); // Get caught just after.
+      }
+    } catch (_) {
+      // TODO(hpcl): implement a non ambiguous exception for this case
+      throw ServerException();
+    }
+  }
+
+  @override
+  Stream<Account?> streamAccount() =>
+      _firebaseAuth.userChanges().map<Account?>((user) {
+        final Account? account = (user.isNotNull) ? _mapper(user!) : null;
+        return account;
+      });
+}
diff --git a/packages/wyatt_authentication_bloc/lib/src/data/models/account_model.dart b/packages/wyatt_authentication_bloc/lib/src/data/models/account_model.dart
new file mode 100644
index 00000000..0d1d6b65
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/data/models/account_model.dart
@@ -0,0 +1,27 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:wyatt_authentication_bloc/src/domain/entities/account.dart';
+
+class AccountModel implements Account {
+  @override
+  final String uid;
+
+  @override
+  final String? email;
+
+  AccountModel({required this.uid, required this.email});
+}
diff --git a/packages/wyatt_authentication_bloc/lib/src/data/models/account_wrapper_model.dart b/packages/wyatt_authentication_bloc/lib/src/data/models/account_wrapper_model.dart
new file mode 100644
index 00000000..69bffd98
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/data/models/account_wrapper_model.dart
@@ -0,0 +1,27 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:wyatt_authentication_bloc/src/domain/entities/account.dart';
+import 'package:wyatt_authentication_bloc/src/domain/entities/account_wrapper.dart';
+
+class AccountWrapperModel<T> extends AccountWrapper<T> {
+  @override
+  final Account? account;
+  @override
+  final T? data;
+
+  AccountWrapperModel(this.account, this.data);
+}
diff --git a/packages/wyatt_authentication_bloc/lib/src/data/models/models.dart b/packages/wyatt_authentication_bloc/lib/src/data/models/models.dart
new file mode 100644
index 00000000..09cc76bf
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/data/models/models.dart
@@ -0,0 +1,18 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+export 'account_model.dart';
+export 'account_wrapper_model.dart';
diff --git a/packages/wyatt_authentication_bloc/lib/src/data/models/user_firebase.dart b/packages/wyatt_authentication_bloc/lib/src/data/models/user_firebase.dart
deleted file mode 100644
index 31139cf3..00000000
--- a/packages/wyatt_authentication_bloc/lib/src/data/models/user_firebase.dart
+++ /dev/null
@@ -1,82 +0,0 @@
-// Copyright (C) 2022 WYATT GROUP
-// Please see the AUTHORS file for details.
-// 
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// any later version.
-// 
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-// 
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <https://www.gnu.org/licenses/>.
-
-import 'package:firebase_auth/firebase_auth.dart';
-import 'package:wyatt_authentication_bloc/src/domain/entities/user.dart' as wyatt;
-
-class UserFirebase implements wyatt.User {
-  final User? _user;
-
-  const UserFirebase(User user) : _user = user;
-
-  User? get inner => _user;
-
-  @override
-  const UserFirebase.empty() : _user = null;
-
-  @override
-  DateTime? get creationTime => _user?.metadata.creationTime;
-
-  @override
-  String? get displayName => _user?.displayName;
-
-  @override
-  String? get email => _user?.email;
-
-  @override
-  bool get emailVerified => _user?.emailVerified ?? false;
-
-  @override
-  bool get isAnonymous => _user?.isAnonymous ?? false;
-
-  @override
-  bool get isEmpty => _user == null;
-
-  @override
-  bool get isNotEmpty => _user != null;
-
-  @override
-  DateTime? get lastSignInTime => _user?.metadata.lastSignInTime;
-
-  @override
-  String? get phoneNumber => _user?.phoneNumber;
-
-  @override
-  String? get photoURL => _user?.photoURL;
-
-  @override
-  String? get refreshToken => _user?.refreshToken;
-
-  @override
-  String get uid => _user?.uid ?? '';
-
-  @override
-  String? get providerId => _user?.providerData.first.providerId;
-
-  @override
-  bool? get isNewUser {
-    if (_user?.metadata.lastSignInTime == null ||
-        _user?.metadata.creationTime == null) {
-      return null;
-    } else {
-      return _user?.metadata.lastSignInTime == _user?.metadata.creationTime;
-    }
-  }
-
-  @override
-  // ignore: lines_longer_than_80_chars
-  String toString() => 'UserFirebase(creationTime: $creationTime, displayName: $displayName, email: $email, emailVerified: $emailVerified, isAnonymous: $isAnonymous, lastSignInTime: $lastSignInTime, phoneNumber: $phoneNumber, photoURL: $photoURL, refreshToken: $refreshToken, uid: $uid)';
-}
diff --git a/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/data_sources.dart b/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/data_sources.dart
new file mode 100644
index 00000000..1e726386
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/data_sources.dart
@@ -0,0 +1,19 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+export 'local/authentication_biometrics_data_source.dart';
+export 'local/authentication_local_data_source.dart';
+export 'remote/authentication_remote_data_source.dart';
diff --git a/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/local/authentication_biometrics_data_source.dart b/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/local/authentication_biometrics_data_source.dart
new file mode 100644
index 00000000..489c9919
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/local/authentication_biometrics_data_source.dart
@@ -0,0 +1,19 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:wyatt_architecture/wyatt_architecture.dart';
+
+abstract class AuthenticationBiometricsDataSource extends BaseLocalDataSource {}
diff --git a/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/local/authentication_local_data_source.dart b/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/local/authentication_local_data_source.dart
new file mode 100644
index 00000000..cd47d32e
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/local/authentication_local_data_source.dart
@@ -0,0 +1,27 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:wyatt_architecture/wyatt_architecture.dart';
+import 'package:wyatt_authentication_bloc/src/domain/entities/account.dart';
+
+abstract class AuthenticationLocalDataSource<T extends Object>
+    extends BaseLocalDataSource {
+  void storeAccount(Account? account);
+  void storeData(T? data);
+  Account loadAccount();
+  T loadData();
+  void destroy();
+}
diff --git a/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/remote/authentication_remote_data_source.dart b/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/remote/authentication_remote_data_source.dart
new file mode 100644
index 00000000..3bd615e1
--- /dev/null
+++ b/packages/wyatt_authentication_bloc/lib/src/domain/data_sources/remote/authentication_remote_data_source.dart
@@ -0,0 +1,36 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:wyatt_architecture/wyatt_architecture.dart';
+import 'package:wyatt_authentication_bloc/src/domain/entities/account.dart';
+
+abstract class AuthenticationRemoteDataSource extends BaseRemoteDataSource {
+  Future<Account> signUp({
+    required String email,
+    required String password,
+  });
+
+  Future<Account> signInWithEmailAndPassword({
+    required String email,
+    required String password,
+  });
+
+  Future<void> signOut();
+
+  Stream<Account?> streamAccount();
+
+  Future<String> getIdentityToken();
+}