diff --git a/doc.md b/doc.md
new file mode 100644
index 0000000..15fa9c3
--- /dev/null
+++ b/doc.md
@@ -0,0 +1,130 @@
+# Encryption des données
+## SHA-256
+- Tokens/sum
+## Argon2id
+- Mots de passe
+- Tokens
+## Symétrique avec clé encryption API
+- Secret utilisateur
+- Banks/name
+## Symétrique secret utilisateur
+- Secret 2FA
+- Usernames
+- Emails
+- Wordings
+- Accounts/amount
+- Todos/name
+
+
+
+# For future
+## Auth
+### GET /auth/2fa
+Take JWT. Generate the 2fa secret and send the link+qrcode.
+### POST /auth/2fa
+Take JWT and 2fa code and verify it's well configured by the user.
+### DELETE /auth/2fa
+Take JWT. Remove the 2fa from the account.
+### POST /auth/2fa/recover
+Take JWT and one 2fa recovery code. Disable the 2fa if code is correct.
+▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
+# Naming
+- AT: Access token (classic JWT, have user id, token type)
+- RT: Refresh token (JWT, have user id, token type)
+- CT: Code token (JWT, have user id, token type, and keep logged value)
+
+# Routes
+
+## Version
+### GET /version
+Return the current backend version.
+
+## Auth
+### POST /auth/login?keep
+Take username, password. Return AT and RT if keep param is present. If verification code present, return CT.
+### POST /auth/logout
+Take AT (and RT if existing) and add them to token blacklist.
+### POST /auth/logout/all
+Take AT, add all existing tokens to blacklist
+### POST /auth/register
+Take username, email and password. Return CT and send email with confirmation code.
+### POST /auth/refresh
+Take old AT and RT, add both to token blacklist and re-send new AT and RT.
+### POST /auth/register/confirm
+Take CT and confirmation code. Return AT.
+### POST /auth/register/confirm/resend
+Take CT. Re-create and re-send a new confirmation code by email. Return new CT.
+
+## Users
+### GET /users/me
+Take JWT and return username and email.
+### PATCH /users/me/username
+Take JWT and new username.
+### PATCH /users/me/password
+Take JWT and new password.
+### DELETE /users/me
+Take JWT.
+
+## Transactions
+### GET /transactions
+Take JWT, return list of user transactions.
+### POST /transactions
+Take JWT, transaction type, amount and wording.
+### PATCH /transactions/:ulid/wording
+Take JWT and new wording.
+### POST /transactions/rectification
+Take JWT, transaction ulid, new amount. Return updated transaction.
+### GET /transactions/categories
+Take JWT, return default and users categories.
+### POST /transactions/categories
+Take JWT, name, icon and color. Return created category.
+### PUT /transactions/categories/:id
+Take JWT, name, icon and color. Return updated category.
+
+## Recurring transactions
+### GET /recurring
+Take JWT, return user recurring transactions.
+### POST /recurring
+Take JWT, wording, type and amount. Return created recurring transaction.
+### PUT /recurring/:id
+Take JWT, wording and amount. Return updated recurring transaction.
+### DELETE /recurring/:id
+Take JWT.
+
+## Tips
+### GET /tips/tod
+Return tips of the day.
+
+## Accounts
+### GET /accounts
+Take JWT, return all user accounts.
+### POST /accounts
+Take JWT, name, bank id and current amount, return created account.
+### PATCH /accounts/:id/name
+Take JWT and name, return updated account.
+### DELETE /accounts/:id
+Take JWT.
+
+## Banks
+### GET /banks
+Take JWT, return user banks and default banks.
+### POST /banks
+Take JWT and bank name, return created bank.
+### PATCH /banks/:id/name
+Take JWT and name, return updated bank.
+### DELETE /banks/:id
+Take JWT.
+
+## Todos
+### GET /todos
+Take JWT. Return all user todos
+### POST /todos
+Take JWT, name, deadline, parent id, icon, color and recurring. Return created todo.
+### PATCH /todos/:id/parent
+Take JWT and new parent id. Return updated todo.
+### PATCH /todos/:id/completed
+Take JWT and new completed value. Return updated todo.
+### PUT /todos/:id
+Take JWT, name, deadline, icon, color, completed value and frequency. Return updated todo.
+### DELETE /todos/:id
+Take JWT.
diff --git a/prisma/migrations/20240104022007_init/migration.sql b/prisma/migrations/20240105225104_init/migration.sql
similarity index 99%
rename from prisma/migrations/20240104022007_init/migration.sql
rename to prisma/migrations/20240105225104_init/migration.sql
index 2a27083..d5a36f5 100644
--- a/prisma/migrations/20240104022007_init/migration.sql
+++ b/prisma/migrations/20240105225104_init/migration.sql
@@ -183,7 +183,7 @@ CREATE UNIQUE INDEX "tips_tips_key" ON "tips"("tips");
 CREATE UNIQUE INDEX "tips_order_key" ON "tips"("order");
 
 -- CreateIndex
-CREATE UNIQUE INDEX "banks_name_key" ON "banks"("name");
+CREATE UNIQUE INDEX "banks_name_user_id_key" ON "banks"("name", "user_id");
 
 -- CreateIndex
 CREATE UNIQUE INDEX "accounts_name_key" ON "accounts"("name");
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index bce63fa..c42377e 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -82,11 +82,12 @@ model Tips {
 
 model Banks {
   id      Int        @id @default(autoincrement())
-  name    String     @unique
+  name    String
   user_id Int?
   user    User?      @relation(fields: [user_id], references: [id])
   account Accounts[]
 
+  @@unique([name, user_id])
   @@map("banks")
 }
 
diff --git a/prisma/seed.ts b/prisma/seed.ts
index 9186c60..71f984a 100644
--- a/prisma/seed.ts
+++ b/prisma/seed.ts
@@ -12,6 +12,7 @@ const encryptionService = new EncryptionService();
 
 async function main(){
     const userSecret = encryptionService.generateSecret();
+    const encryptionKey = process.env.SYMMETRIC_ENCRYPTION_KEY;
     const testUser = await prisma.user.upsert({
         where: {id: 1},
         update: {},
@@ -20,7 +21,7 @@ async function main(){
             username: encryptionService.encryptSymmetric("test", userSecret),
             email: "test@exemple.org",
             password: await encryptionService.hash("password"),
-            secret: encryptionService.encryptSymmetric(userSecret, process.env.SYMMETRIC_ENCRYPTION_KEY),
+            secret: encryptionService.encryptSymmetric(userSecret, encryptionKey),
             verification_code_id: null,
             created_at: new Date(),
             updated_at: new Date(),
@@ -79,7 +80,7 @@ async function main(){
         update: {},
         create: {
             id: 1,
-            name: "Default bank",
+            name: encryptionService.encryptSymmetric("Default bank", encryptionKey),
         },
     });
 
@@ -89,7 +90,7 @@ async function main(){
         create: {
             id: 2,
             user_id: 1,
-            name: "User bank",
+            name: encryptionService.encryptSymmetric("User bank", encryptionKey),
         },
     });
 
diff --git a/src/app.module.ts b/src/app.module.ts
index 1b63fc5..bfe022a 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -7,8 +7,9 @@ import {VerificationCodesModule} from "./verification-codes/verification-codes.m
 import {TodosModule} from "./todos/todos.module";
 import {TipsModule} from "./tips/tips.module";
 import {MaintenanceModule} from "./maintenance/maintenance.module";
+import {BanksModule} from "./banks/banks.module";
 
 @Module({
-    imports: [AuthModule, VersionModule, ConfigModule.forRoot({isGlobal: true}), UsersModule, VerificationCodesModule, TodosModule, TipsModule, MaintenanceModule],
+    imports: [AuthModule, VersionModule, ConfigModule.forRoot({isGlobal: true}), UsersModule, VerificationCodesModule, TodosModule, TipsModule, MaintenanceModule, BanksModule],
 })
 export class AppModule{}
diff --git a/src/banks/banks.controller.ts b/src/banks/banks.controller.ts
new file mode 100644
index 0000000..25d1d6f
--- /dev/null
+++ b/src/banks/banks.controller.ts
@@ -0,0 +1,57 @@
+import {Body, Controller, Delete, Get, HttpStatus, Param, Patch, Post, Req, UseGuards} from "@nestjs/common";
+import {MaintenanceGuard} from "../maintenance/guards/maintenance.guard";
+import {ApiBearerAuth, ApiResponse} from "@nestjs/swagger";
+import {AtGuard} from "../auth/guards/at.guard";
+import {BanksService} from "./banks.service";
+import {BankEntity} from "./models/entities/bank.entity";
+import {BankNameDto} from "./models/dto/bank-name.dto";
+import {IdDto} from "../models/dto/id.dto";
+
+@Controller("banks")
+@UseGuards(MaintenanceGuard)
+export class BanksController{
+    constructor(
+        private readonly banksService: BanksService
+    ){}
+
+    @Get()
+    @UseGuards(AtGuard)
+    @ApiBearerAuth()
+    @ApiResponse({status: HttpStatus.OK, description: "User and default banks returned", type: BankEntity, isArray: true})
+    @ApiResponse({status: HttpStatus.UNAUTHORIZED, description: "Invalid or missing access token"})
+    @ApiResponse({status: HttpStatus.NOT_FOUND, description: "User not found"})
+    async getBanks(@Req() req: any): Promise<BankEntity[]>{
+        return this.banksService.getBanks(req.user.id);
+    }
+
+    @Post()
+    @UseGuards(AtGuard)
+    @ApiBearerAuth()
+    @ApiResponse({status: HttpStatus.CREATED, description: "Bank added", type: BankEntity})
+    @ApiResponse({status: HttpStatus.UNAUTHORIZED, description: "Invalid or missing access token"})
+    @ApiResponse({status: HttpStatus.NOT_FOUND, description: "User not found"})
+    @ApiResponse({status: HttpStatus.CONFLICT, description: "Bank already exists"})
+    async addBank(@Req() req: any, @Body() bankNameDto: BankNameDto): Promise<BankEntity>{
+        return this.banksService.addBank(req.user.id, bankNameDto.name);
+    }
+
+    @Patch(":id/name")
+    @UseGuards(AtGuard)
+    @ApiBearerAuth()
+    @ApiResponse({status: HttpStatus.OK, description: "Bank name updated", type: BankEntity})
+    @ApiResponse({status: HttpStatus.UNAUTHORIZED, description: "Invalid or missing access token"})
+    @ApiResponse({status: HttpStatus.NOT_FOUND, description: "User or bank not found"})
+    async updateBankName(@Req() req: any, @Param() idDto: IdDto, @Body() bankNameDto: BankNameDto): Promise<BankEntity>{
+        return this.banksService.updateBankName(req.user.id, idDto.id, bankNameDto.name);
+    }
+
+    @Delete(":id")
+    @UseGuards(AtGuard)
+    @ApiBearerAuth()
+    @ApiResponse({status: HttpStatus.OK, description: "Bank deleted", type: BankEntity})
+    @ApiResponse({status: HttpStatus.UNAUTHORIZED, description: "Invalid or missing access token"})
+    @ApiResponse({status: HttpStatus.NOT_FOUND, description: "User or bank not found"})
+    async deleteBank(@Req() req: any, @Param() idDto: IdDto): Promise<BankEntity>{
+        return this.banksService.deleteBank(req.user.id, idDto.id);
+    }
+}
diff --git a/src/banks/banks.module.ts b/src/banks/banks.module.ts
new file mode 100644
index 0000000..538cb31
--- /dev/null
+++ b/src/banks/banks.module.ts
@@ -0,0 +1,12 @@
+import {Module} from "@nestjs/common";
+import {BanksService} from "./banks.service";
+import {BanksController} from "./banks.controller";
+import {ServicesModule} from "../services/services.module";
+import {UsersModule} from "../users/users.module";
+
+@Module({
+    controllers: [BanksController],
+    providers: [BanksService],
+    imports: [ServicesModule, UsersModule],
+})
+export class BanksModule{}
diff --git a/src/banks/banks.service.ts b/src/banks/banks.service.ts
new file mode 100644
index 0000000..78b39e3
--- /dev/null
+++ b/src/banks/banks.service.ts
@@ -0,0 +1,97 @@
+import {Injectable, NotFoundException} from "@nestjs/common";
+import {BankEntity} from "./models/entities/bank.entity";
+import {PrismaService} from "../services/prisma.service";
+import {ConfigService} from "@nestjs/config";
+import {EncryptionService} from "../services/encryption.service";
+import {UsersService} from "../users/users.service";
+
+@Injectable()
+export class BanksService{
+
+    constructor(
+        private readonly prismaService: PrismaService,
+        private readonly configService: ConfigService,
+        private readonly encryptionService: EncryptionService,
+        private readonly usersService: UsersService,
+    ){}
+
+    async getBanks(userId: number): Promise<BankEntity[]>{
+        if(!await this.usersService.isUserExists(userId))
+            throw new NotFoundException("User not found");
+        const banks: BankEntity[] = await this.prismaService.banks.findMany({
+            where: {
+                OR: [
+                    {user_id: userId},
+                    {user_id: null},
+                ],
+            }
+        });
+        for(const bank of banks)
+            bank.name = this.encryptionService.decryptSymmetric(bank.name, this.configService.get("SYMMETRIC_ENCRYPTION_KEY"));
+        return banks;
+    }
+
+    async addBank(userId: number, bankName: string): Promise<BankEntity>{
+        if(!await this.usersService.isUserExists(userId))
+            throw new NotFoundException("User not found");
+        const banks = await this.getBanks(userId);
+        for(const bank of banks)
+            if(bank.name === bankName)
+                throw new NotFoundException("Bank already exists");
+        const bank: BankEntity = await this.prismaService.banks.create({
+            data: {
+                user_id: userId,
+                name: this.encryptionService.encryptSymmetric(bankName, this.configService.get("SYMMETRIC_ENCRYPTION_KEY")),
+            }
+        });
+        bank.name = bankName;
+        return bank;
+    }
+
+    async updateBankName(userId: number, bankId: number, name: string): Promise<BankEntity>{
+        if(!await this.usersService.isUserExists(userId))
+            throw new NotFoundException("User not found");
+        const bank: BankEntity = await this.prismaService.banks.findUnique({
+            where: {
+                id: bankId,
+                user_id: userId,
+            }
+        });
+        if(!bank)
+            throw new NotFoundException("User bank not found");
+        const banks = await this.getBanks(userId);
+        for(const bank of banks)
+            if(bank.name === name)
+                throw new NotFoundException("Bank already exists with this name");
+        await this.prismaService.banks.update({
+            where: {
+                id: bankId,
+            },
+            data: {
+                name: this.encryptionService.encryptSymmetric(name, this.configService.get("SYMMETRIC_ENCRYPTION_KEY")),
+            }
+        });
+        bank.name = name;
+        return bank;
+    }
+
+    async deleteBank(userId: number, bankId: number): Promise<BankEntity>{
+        if(!await this.usersService.isUserExists(userId))
+            throw new NotFoundException("User not found");
+        const bank: BankEntity = await this.prismaService.banks.findUnique({
+            where: {
+                id: bankId,
+                user_id: userId,
+            }
+        });
+        if(!bank)
+            throw new NotFoundException("User bank not found");
+        await this.prismaService.banks.delete({
+            where: {
+                id: bankId,
+            }
+        });
+        bank.name = this.encryptionService.decryptSymmetric(bank.name, this.configService.get("SYMMETRIC_ENCRYPTION_KEY"));
+        return bank;
+    }
+}
diff --git a/src/banks/models/dto/bank-name.dto.ts b/src/banks/models/dto/bank-name.dto.ts
new file mode 100644
index 0000000..f1df38a
--- /dev/null
+++ b/src/banks/models/dto/bank-name.dto.ts
@@ -0,0 +1,9 @@
+import {ApiProperty} from "@nestjs/swagger";
+import {IsNotEmpty, IsString} from "class-validator";
+
+export class BankNameDto{
+    @ApiProperty()
+    @IsString()
+    @IsNotEmpty()
+        name: string;
+}
diff --git a/src/banks/models/entities/bank.entity.ts b/src/banks/models/entities/bank.entity.ts
new file mode 100644
index 0000000..ee30da8
--- /dev/null
+++ b/src/banks/models/entities/bank.entity.ts
@@ -0,0 +1,11 @@
+import {Banks} from "@prisma/client";
+import {ApiProperty} from "@nestjs/swagger";
+
+export class BankEntity implements Banks{
+    @ApiProperty()
+        id: number;
+    @ApiProperty()
+        name: string;
+    @ApiProperty()
+        user_id: number;
+}
diff --git a/src/middlewares/logger.middleware.ts b/src/middlewares/logger.middleware.ts
index 11c88d6..8e48732 100644
--- a/src/middlewares/logger.middleware.ts
+++ b/src/middlewares/logger.middleware.ts
@@ -20,7 +20,7 @@ export class LoggerMiddleware implements NestMiddleware{
             const path = req.url;
             const statusCode = res.statusCode;
             const duration = Date.now() - startTime;
-            const resSize = res.getHeader("Content-Length");
+            const resSize = res.getHeader("Content-Length") || "N/A";
             console.log(`${currentTime} ${httpOrHttps} ${method} ${path} ${statusCode} ${duration}ms ${resSize}`);
         });
         next();
diff --git a/src/todos/models/dto/todo-id.dto.ts b/src/models/dto/id.dto.ts
similarity index 89%
rename from src/todos/models/dto/todo-id.dto.ts
rename to src/models/dto/id.dto.ts
index afd10ff..db02b88 100644
--- a/src/todos/models/dto/todo-id.dto.ts
+++ b/src/models/dto/id.dto.ts
@@ -2,7 +2,7 @@ import {ApiProperty} from "@nestjs/swagger";
 import {IsNotEmpty} from "class-validator";
 import {Type} from "class-transformer";
 
-export class TodoIdDto{
+export class IdDto{
     @ApiProperty()
     @IsNotEmpty()
     @Type(() => Number)
diff --git a/src/todos/todos.controller.ts b/src/todos/todos.controller.ts
index 36f9094..97d0296 100644
--- a/src/todos/todos.controller.ts
+++ b/src/todos/todos.controller.ts
@@ -5,7 +5,7 @@ import {UpdateParentDto} from "./models/dto/update-parent.dto";
 import {CreateTodoDto} from "./models/dto/create-todo.dto";
 import {UpdateTodoDto} from "./models/dto/update-todo.dto";
 import {TodoEntity} from "./models/entities/todo.entity";
-import {TodoIdDto} from "./models/dto/todo-id.dto";
+import {IdDto} from "../models/dto/id.dto";
 import {AtGuard} from "../auth/guards/at.guard";
 import {TodosService} from "./todos.service";
 import {MaintenanceGuard} from "../maintenance/guards/maintenance.guard";
@@ -50,7 +50,7 @@ export class TodosController{
     @ApiResponse({status: HttpStatus.OK, description: "Set todo parent", type: TodoEntity})
     @ApiResponse({status: HttpStatus.UNAUTHORIZED, description: "Invalid or missing access token"})
     @ApiResponse({status: HttpStatus.NOT_FOUND, description: "Todo not found"})
-    async setTodoParent(@Req() req: any, @Param() todoIdDto: TodoIdDto, @Body() updateParentDto: UpdateParentDto): Promise<TodoEntity>{
+    async setTodoParent(@Req() req: any, @Param() todoIdDto: IdDto, @Body() updateParentDto: UpdateParentDto): Promise<TodoEntity>{
         return await this.todosService.setTodoParent(req.user.id, todoIdDto.id, updateParentDto.parent_id);
     }
 
@@ -60,7 +60,7 @@ export class TodosController{
     @ApiResponse({status: HttpStatus.OK, description: "Set todo completed", type: TodoEntity})
     @ApiResponse({status: HttpStatus.UNAUTHORIZED, description: "Invalid or missing access token"})
     @ApiResponse({status: HttpStatus.NOT_FOUND, description: "Todo not found"})
-    async setTodoCompleted(@Req() req: any, @Param() todoIdDto: TodoIdDto, @Body() updateCompletedDto: UpdateCompletedDto): Promise<TodoEntity>{
+    async setTodoCompleted(@Req() req: any, @Param() todoIdDto: IdDto, @Body() updateCompletedDto: UpdateCompletedDto): Promise<TodoEntity>{
         return await this.todosService.setTodoCompleted(req.user.id, todoIdDto.id, updateCompletedDto.completed);
     }
 
@@ -70,7 +70,7 @@ export class TodosController{
     @ApiResponse({status: HttpStatus.OK, description: "Update a todo", type: TodoEntity})
     @ApiResponse({status: HttpStatus.UNAUTHORIZED, description: "Invalid or missing access token"})
     @ApiResponse({status: HttpStatus.NOT_FOUND, description: "Todo not found"})
-    async updateTodo(@Req() req: any, @Param() todoIdDto: TodoIdDto, @Body() updateTodoDto: UpdateTodoDto): Promise<TodoEntity>{
+    async updateTodo(@Req() req: any, @Param() todoIdDto: IdDto, @Body() updateTodoDto: UpdateTodoDto): Promise<TodoEntity>{
         return await this.todosService.updateTodo(
             req.user.id,
             todoIdDto.id,
@@ -89,7 +89,7 @@ export class TodosController{
     @ApiResponse({status: HttpStatus.OK, description: "Delete a todo", type: TodoEntity})
     @ApiResponse({status: HttpStatus.UNAUTHORIZED, description: "Invalid or missing access token"})
     @ApiResponse({status: HttpStatus.NOT_FOUND, description: "Todo not found"})
-    async deleteTodo(@Req() req: any, @Param() todoIdDto: TodoIdDto): Promise<TodoEntity>{
+    async deleteTodo(@Req() req: any, @Param() todoIdDto: IdDto): Promise<TodoEntity>{
         return await this.todosService.deleteTodo(req.user.id, todoIdDto.id);
     }
 }
diff --git a/src/users/models/entities/user.entity.ts b/src/users/models/entities/user.entity.ts
index aab0627..ae9190e 100644
--- a/src/users/models/entities/user.entity.ts
+++ b/src/users/models/entities/user.entity.ts
@@ -1,12 +1,21 @@
 import {User} from "@prisma/client";
+import {ApiProperty} from "@nestjs/swagger";
 
 export class UserEntity implements User{
-    id: number;
-    username: string;
-    email: string;
-    password: string;
-    secret: string;
-    verification_code_id: number;
-    created_at: Date;
-    updated_at: Date;
+    @ApiProperty()
+        id: number;
+    @ApiProperty()
+        username: string;
+    @ApiProperty()
+        email: string;
+    @ApiProperty()
+        password: string;
+    @ApiProperty()
+        secret: string;
+    @ApiProperty()
+        verification_code_id: number;
+    @ApiProperty()
+        created_at: Date;
+    @ApiProperty()
+        updated_at: Date;
 }