diff --git a/pom.xml b/pom.xml
index 81738c6..08bc5f5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -77,6 +77,10 @@
             <groupId>org.flywaydb</groupId>
             <artifactId>flyway-mysql</artifactId>
         </dependency>
+        <dependency>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/src/main/java/net/sytes/kashey/sweater/config/WebSecurityConfig.java b/src/main/java/net/sytes/kashey/sweater/config/WebSecurityConfig.java
index 293d5b5..01e2a36 100644
--- a/src/main/java/net/sytes/kashey/sweater/config/WebSecurityConfig.java
+++ b/src/main/java/net/sytes/kashey/sweater/config/WebSecurityConfig.java
@@ -6,6 +6,8 @@ import org.springframework.security.config.annotation.method.configuration.Enabl
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.annotation.web.configurers.LogoutConfigurer;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.security.web.SecurityFilterChain;
 
 @Configuration
@@ -13,6 +15,10 @@ import org.springframework.security.web.SecurityFilterChain;
 @EnableMethodSecurity
 public class WebSecurityConfig {
 
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder(8);
+    }
     @Bean
     public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
         http
diff --git a/src/main/java/net/sytes/kashey/sweater/controller/ControllerUtils.java b/src/main/java/net/sytes/kashey/sweater/controller/ControllerUtils.java
new file mode 100644
index 0000000..13d4aa7
--- /dev/null
+++ b/src/main/java/net/sytes/kashey/sweater/controller/ControllerUtils.java
@@ -0,0 +1,19 @@
+package net.sytes.kashey.sweater.controller;
+
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.FieldError;
+
+import java.util.Map;
+import java.util.stream.Collector;
+import java.util.stream.Collectors;
+
+public class ControllerUtils {
+    static Map<String, String> getErrors(BindingResult bindingResult) {
+
+        Collector<FieldError, ?, Map<String, String>> collector = Collectors.toMap(
+                fieldError -> fieldError.getField() + "Error",
+                FieldError::getDefaultMessage
+        );
+        return bindingResult.getFieldErrors().stream().collect(collector);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/net/sytes/kashey/sweater/controller/MainController.java b/src/main/java/net/sytes/kashey/sweater/controller/MainController.java
index 7f43371..1dfa3d0 100644
--- a/src/main/java/net/sytes/kashey/sweater/controller/MainController.java
+++ b/src/main/java/net/sytes/kashey/sweater/controller/MainController.java
@@ -1,5 +1,6 @@
 package net.sytes.kashey.sweater.controller;
 
+import jakarta.validation.Valid;
 import net.sytes.kashey.sweater.domain.Message;
 import net.sytes.kashey.sweater.repository.MessageRepository;
 import net.sytes.kashey.sweater.security.CustomUserDetails;
@@ -7,6 +8,7 @@ import org.springframework.beans.factory.annotation.Value;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
+import org.springframework.validation.BindingResult;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestParam;
@@ -14,6 +16,7 @@ import org.springframework.web.multipart.MultipartFile;
 
 import java.io.File;
 import java.io.IOException;
+import java.util.Map;
 import java.util.Objects;
 import java.util.UUID;
 
@@ -48,25 +51,34 @@ public class MainController {
 
     @PostMapping("/main")
     public String addMessage(@AuthenticationPrincipal CustomUserDetails customUserDetails,
-                             @RequestParam String text,
-                             @RequestParam String tag,
-                             @RequestParam("file") MultipartFile file,
-                             Model model) throws IOException {
+                             @Valid Message message,
+                             BindingResult bindingResult,
+                             Model model,
+                             @RequestParam("file") MultipartFile file
+    ) throws IOException {
 
-        Message newMessage = new Message(text, tag, customUserDetails.getUser());
+        message.setAuthor(customUserDetails.getUser());
 
-        if (file != null && !Objects.requireNonNull(file.getOriginalFilename()).isEmpty()) {
-            File uploadDir = new File(uploadPath); // Директория на сервере, куда помещаем пришедший файл
-            if (!uploadDir.exists()) {
-                uploadDir.mkdirs();
+        if (bindingResult.hasErrors()) {
+            Map<String, String> errorsMap = ControllerUtils.getErrors(bindingResult);
+            model.mergeAttributes(errorsMap);
+            model.addAttribute("message", message);
+        } else {
+
+            if (file != null && !Objects.requireNonNull(file.getOriginalFilename()).isEmpty()) {
+                File uploadDir = new File(uploadPath); // Директория на сервере, куда помещаем пришедший файл
+                if (!uploadDir.exists()) {
+                    uploadDir.mkdirs();
+                }
+                String uuidFile = UUID.randomUUID().toString();
+                String resultFilename = uuidFile + "." + file.getOriginalFilename(); // случайный уид + имя файла с клиента
+                file.transferTo(new File(uploadPath + "/" + resultFilename)); // помещаем переименованный файл с клиента в директорию сервера
+                message.setFilename(resultFilename);
             }
-            String uuidFile = UUID.randomUUID().toString();
-            String resultFilename = uuidFile + "." + file.getOriginalFilename(); // случайный уид + имя файла с клиента
-            file.transferTo(new File(uploadPath + "/" + resultFilename)); // помещаем переименованный файл с клиента в директорию сервера
-            newMessage.setFilename(resultFilename);
-        }
 
-        messageRepository.save(newMessage);
+            messageRepository.save(message);
+            model.addAttribute("message", null);
+        }
         model.addAttribute("messages", messageRepository.findAll());
         model.addAttribute("tag", "");
         return "main";
diff --git a/src/main/java/net/sytes/kashey/sweater/controller/RegistrationController.java b/src/main/java/net/sytes/kashey/sweater/controller/RegistrationController.java
index 1e21ef1..a7d6424 100644
--- a/src/main/java/net/sytes/kashey/sweater/controller/RegistrationController.java
+++ b/src/main/java/net/sytes/kashey/sweater/controller/RegistrationController.java
@@ -1,17 +1,16 @@
 package net.sytes.kashey.sweater.controller;
 
+import jakarta.validation.Valid;
 import net.sytes.kashey.sweater.domain.User;
-import net.sytes.kashey.sweater.repository.UserRepository;
 import net.sytes.kashey.sweater.service.CustomUserDetailsService;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
+import org.springframework.validation.BindingResult;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 
-import java.util.Map;
-
 @Controller
 public class RegistrationController {
     private final CustomUserDetailsService customUserDetailsService;
@@ -27,11 +26,20 @@ public class RegistrationController {
     }
 
     @PostMapping("/registration")
-    public String addUser(@ModelAttribute User user, Map<String, Object> model) {
+    public String addUser(@ModelAttribute @Valid User user, BindingResult bindingResult, Model model) {
+
+        if (user.getPassword() != null && !user.getPassword().equals(user.getPassword2())) {
+            model.addAttribute("passwordError", "Passwords do not match!");
+        }
+
+        if (bindingResult.hasErrors()) {
+            model.mergeAttributes(ControllerUtils.getErrors(bindingResult));
+            return "registration";
+        }
 
         String result = customUserDetailsService.addUser(user);
         if (!result.isEmpty()) {
-            model.put("message", result);
+            model.addAttribute("usernameError", result);
             return "registration";
         } else {
             return "redirect:/login";
diff --git a/src/main/java/net/sytes/kashey/sweater/domain/Message.java b/src/main/java/net/sytes/kashey/sweater/domain/Message.java
index 4048587..fd95fae 100644
--- a/src/main/java/net/sytes/kashey/sweater/domain/Message.java
+++ b/src/main/java/net/sytes/kashey/sweater/domain/Message.java
@@ -1,13 +1,19 @@
 package net.sytes.kashey.sweater.domain;
 
 import jakarta.persistence.*;
+import jakarta.validation.constraints.NotBlank;
+import org.hibernate.validator.constraints.Length;
 
 @Entity
 public class Message {
     @Id
     @GeneratedValue(strategy = GenerationType.AUTO)
     private Long id;
+
+    @NotBlank(message = "Please fill in the field.")
+    @Length(max = 2048, message = "Message too long.")
     private String text;
+    @Length(max = 255, message = "Tag too long.")
     private String tag;
 
     private String filename;
diff --git a/src/main/java/net/sytes/kashey/sweater/domain/User.java b/src/main/java/net/sytes/kashey/sweater/domain/User.java
index 86819dd..8af54ff 100644
--- a/src/main/java/net/sytes/kashey/sweater/domain/User.java
+++ b/src/main/java/net/sytes/kashey/sweater/domain/User.java
@@ -1,6 +1,8 @@
 package net.sytes.kashey.sweater.domain;
 
 import jakarta.persistence.*;
+import jakarta.validation.constraints.Email;
+import jakarta.validation.constraints.NotBlank;
 
 import java.util.Set;
 
@@ -11,10 +13,18 @@ public class User {
     @Id
     @GeneratedValue(strategy = GenerationType.AUTO)
     private Long id;
+    @NotBlank(message = "Username must not be empty.")
     private String username;
+    @NotBlank(message = "Password must not be empty.")
     private String password;
+
+    @Transient
+    @NotBlank(message = "Password confirmation must not be empty.")
+    private String password2;
     private boolean enabled;
 
+    @Email(message = "E-mail is not valid.")
+    @NotBlank(message = "E-mail must not be empty.")
     private String email;
 
     private String activationCode;
@@ -90,4 +100,12 @@ public class User {
     public void setActivationCode(String activationCode) {
         this.activationCode = activationCode;
     }
+
+    public String getPassword2() {
+        return password2;
+    }
+
+    public void setPassword2(String password2) {
+        this.password2 = password2;
+    }
 }
diff --git a/src/main/java/net/sytes/kashey/sweater/service/CustomUserDetailsService.java b/src/main/java/net/sytes/kashey/sweater/service/CustomUserDetailsService.java
index 398662d..c8e02d8 100644
--- a/src/main/java/net/sytes/kashey/sweater/service/CustomUserDetailsService.java
+++ b/src/main/java/net/sytes/kashey/sweater/service/CustomUserDetailsService.java
@@ -8,6 +8,7 @@ import org.springframework.beans.factory.annotation.Value;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Service;
 import org.springframework.util.ObjectUtils;
 
@@ -19,19 +20,26 @@ public class CustomUserDetailsService implements UserDetailsService {
 
     private final UserRepository userRepository;
     private final EmailService emailService;
+    private final PasswordEncoder passwordEncoder;
 
     @Value("${hosting.path}")
     private String hostingPath;
 
-    public CustomUserDetailsService(UserRepository userRepository, EmailService emailService) {
+    public CustomUserDetailsService(UserRepository userRepository, EmailService emailService,
+                                    PasswordEncoder passwordEncoder) {
 
         this.userRepository = userRepository;
         this.emailService = emailService;
+        this.passwordEncoder = passwordEncoder;
     }
 
     @Override
     public UserDetails loadUserByUsername(String name) throws UsernameNotFoundException {
 
+        if (name == null) {
+            throw new UsernameNotFoundException("Username is empty!");
+        }
+
         User user = userRepository.findByUsername(name)
                 .orElseThrow(() -> new UsernameNotFoundException("User not found: " + name));
         return new CustomUserDetails(user);
@@ -50,7 +58,7 @@ public class CustomUserDetailsService implements UserDetailsService {
         user.setEnabled(true);
         user.setActivationCode(UUID.randomUUID().toString());
         user.setRoles(Collections.singleton(Role.USER));
-        user.setPassword("{noop}" + user.getPassword()); //пока не введено шифрование паролей
+        user.setPassword(passwordEncoder.encode(user.getPassword()));
         userRepository.save(user);
 
         sendMessage(user);
@@ -114,7 +122,7 @@ public class CustomUserDetailsService implements UserDetailsService {
         }
 
         if (!ObjectUtils.isEmpty(password)) {
-            user.setPassword("{noop}" + password);
+            user.setPassword(password);
         }
 
         userRepository.save(user);
diff --git a/src/main/resources/db/migration/V2__Add_admin.sql b/src/main/resources/db/migration/V2__Add_admin.sql
index a2ac870..f8aafcf 100644
--- a/src/main/resources/db/migration/V2__Add_admin.sql
+++ b/src/main/resources/db/migration/V2__Add_admin.sql
@@ -1,5 +1,5 @@
 insert into usr (id, username, password, enabled)
-values (1, 'admin', '{noop}admin', true);
+values (1, 'admin', '$2a$12$.XB1cxFOs6F8vgouixcTP.TaY2GXwFspYHID12JpLwotvoYI0JwnC', true);
 
 insert into user_role (user_id, roles)
 values (1, 'USER'), (1, 'ADMIN');
\ No newline at end of file
diff --git a/src/main/resources/templates/login.ftl b/src/main/resources/templates/login.ftl
index b9fdbc5..fca2ec4 100644
--- a/src/main/resources/templates/login.ftl
+++ b/src/main/resources/templates/login.ftl
@@ -2,8 +2,10 @@
 <#import "parts/login.ftl" as l>
 
 <@com.page>
-    <#if message??>
-        <div class="mb-3"> ${message} </div>
+    <#if Session?? && Session.SPRING_SECURITY_LAST_EXCEPTION??>
+        <div class="alert alert-danger" role="alert">
+            ${Session.SPRING_SECURITY_LAST_EXCEPTION.message}
+        </div>
     </#if>
     <@l.login "/login" false/>
 </@com.page>
\ No newline at end of file
diff --git a/src/main/resources/templates/main.ftl b/src/main/resources/templates/main.ftl
index eef5522..10f520e 100644
--- a/src/main/resources/templates/main.ftl
+++ b/src/main/resources/templates/main.ftl
@@ -12,14 +12,26 @@
        aria-controls="collapseExample">
         Click to add message
     </a>
-    <div class="collapse" id="collapseExample">
+    <div class="collapse <#if message??>show</#if>" id="collapseExample">
         <div class="form-group mt-3">
             <form method="post" enctype="multipart/form-data">
                 <div class="form-group">
-                    <input type="text" class="form-control" name="text" placeholder="Text"/>
+                    <input type="text" class="form-control ${(textError??)?string('is-invalid', '')}"
+                           value="<#if message??>${message.text}</#if>" name="text" placeholder="Text" />
+                    <#if textError??>
+                        <div class="invalid-feedback">
+                            ${textError}
+                        </div>
+                    </#if>
                 </div>
                 <div class="form-group">
-                    <input type="text" class="form-control" name="tag" placeholder="Tag">
+                    <input type="text" class="form-control ${(tagError??)?string('is-invalid', '')}"
+                           value="<#if message??>${message.tag}</#if>" name="tag" placeholder="Tag">
+                    <#if tagError??>
+                        <div class="invalid-feedback">
+                            ${tagError}
+                        </div>
+                    </#if>
                 </div>
                 <div class="form-group">
                     <div class="custom-file">
diff --git a/src/main/resources/templates/parts/login.ftl b/src/main/resources/templates/parts/login.ftl
index 7a8489d..22d5dec 100644
--- a/src/main/resources/templates/parts/login.ftl
+++ b/src/main/resources/templates/parts/login.ftl
@@ -3,24 +3,57 @@
         <div class="row mb-3">
             <label class="col-sm-2 col-form-label"> User Name:</label>
             <div class="col-sm-6">
-                <input type="text" class="form-control" name="username" placeholder="User name"/>
+                <input type="text" name="username" value="<#if user??>${user.username}</#if>"
+                       class="form-control ${(usernameError??)?string('is-invalid', '')}"
+                       placeholder="User name"/>
+                <#if usernameError??>
+                    <div class="invalid-feedback">
+                        ${usernameError}
+                    </div>
+                </#if>
             </div>
         </div>
         <div class="row mb-3">
             <label for="inputPassword3" class="col-sm-2 col-form-label"> Password: </label>
             <div class="col-sm-6">
-                <input type="password" class="form-control" name="password" placeholder="Password">
+                <input type="password" name="password"
+                       class="form-control ${(passwordError??)?string('is-invalid', '')}"
+                       placeholder="Password"/>
+                <#if passwordError??>
+                    <div class="invalid-feedback">
+                        ${passwordError}
+                    </div>
+                </#if>
             </div>
         </div>
         <#if isRegistrationForm>
+            <div class="form-group row">
+                <label class="col-sm-2 col-form-label">Password:</label>
+                <div class="col-sm-6">
+                    <input type="password" name="password2"
+                           class="form-control ${(password2Error??)?string('is-invalid', '')}"
+                           placeholder="Confirm password"/>
+                    <#if password2Error??>
+                        <div class="invalid-feedback">
+                            ${password2Error}
+                        </div>
+                    </#if>
+                </div>
+            </div>
             <div class="row mb-3">
                 <label class="col-sm-2 col-form-label"> E-mail:</label>
                 <div class="col-sm-6">
-                    <input type="email" class="form-control" name="email" placeholder="E-mail"/>
+                    <input type="email" name="email" value="<#if user??>${user.email}</#if>"
+                           class="form-control ${(emailError??)?string('is-invalid', '')}"
+                           placeholder="E-m@il"/>
+                    <#if emailError??>
+                        <div class="invalid-feedback">
+                            ${emailError}
+                        </div>
+                    </#if>
                 </div>
             </div>
         </#if>
-
         <#if !isRegistrationForm>
             <a href="/registration" class="btn btn-primary">Add new user</a>
         </#if>