diff --git a/jpablog/src/main/java/com/example/jpablog/config/SecurityConfig.java b/jpablog/src/main/java/com/example/jpablog/config/SecurityConfig.java
index 1e1a69ef..4049d224 100644
--- a/jpablog/src/main/java/com/example/jpablog/config/SecurityConfig.java
+++ b/jpablog/src/main/java/com/example/jpablog/config/SecurityConfig.java
@@ -1,5 +1,7 @@
 package com.example.jpablog.config;
 
+import com.example.jpablog.config.auth.PrincipalDetailService;
+import lombok.RequiredArgsConstructor;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
@@ -10,22 +12,36 @@ import org.springframework.security.config.annotation.web.configuration.WebSecur
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 
 @Configuration // bean 등록
+@RequiredArgsConstructor
 @EnableWebSecurity // 시큐리티 필터 등록
 @EnableGlobalMethodSecurity(prePostEnabled = true) // 특정 주소 접근시 먼저 권한 및 인증 체크
 public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
+    private final PrincipalDetailService principalDetailService;
+
     @Bean
     public BCryptPasswordEncoder encodePWD() {
         return new BCryptPasswordEncoder();
     }
 
+    // 시큐리티가 대신 로그인 할때 어떤 해시를 사용했는지 알아야 DB와 비교가능
+
+
+    @Override
+    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
+        auth.userDetailsService(principalDetailService).passwordEncoder(encodePWD());
+    }
+
     @Override
     protected void configure(HttpSecurity http) throws Exception {
         http
-                .csrf().disable() // csrf 토큰 비활성화
-                .authorizeRequests()
-                .antMatchers("/", "/auth/**", "/js/**", "/css/**", "/images/**").permitAll()
-                .anyRequest().authenticated()
-                .and().formLogin().loginPage("/auth/loginForm");
+            .csrf().disable() // csrf 토큰 비활성화
+            .authorizeRequests() // 요청에 대한 인증
+                .antMatchers("/", "/auth/**", "/js/**", "/css/**", "/images/**").permitAll() // 해당 주소로 들어오면 모두 허가
+                .anyRequest().authenticated() // 나머지 요청은 모두 인증을 거쳐야 함
+            .and()
+                .formLogin().loginPage("/auth/loginForm") // 로그인 폼 지정
+                .loginProcessingUrl("/auth/loginProc") // 해당 주소로 들어오는 로그인 요청을 가로채서 스프링 시큐리티가 로그인
+                .defaultSuccessUrl("/"); // 정상 로그인 완료 후 이동 URL
     }
 }
diff --git a/jpablog/src/main/java/com/example/jpablog/config/auth/PrincipalDetail.java b/jpablog/src/main/java/com/example/jpablog/config/auth/PrincipalDetail.java
new file mode 100644
index 00000000..fa98c682
--- /dev/null
+++ b/jpablog/src/main/java/com/example/jpablog/config/auth/PrincipalDetail.java
@@ -0,0 +1,58 @@
+package com.example.jpablog.config.auth;
+
+import com.example.jpablog.model.User;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.userdetails.UserDetails;
+
+import java.util.ArrayDeque;
+import java.util.Collection;
+
+public class PrincipalDetail implements UserDetails {
+    private final User user;
+
+    public PrincipalDetail(User user) {
+        this.user = user;
+    }
+
+    @Override
+    public String getPassword() {
+        return user.getPassword();
+    }
+
+    @Override
+    public String getUsername() {
+        return user.getUsername();
+    }
+
+    // 계정 만료 여부 ( false : 만료 )
+    @Override
+    public boolean isAccountNonExpired() {
+        return true;
+    }
+
+    // 계정이 잠금 여부 ( false : 잠김 )
+    @Override
+    public boolean isAccountNonLocked() {
+        return true;
+    }
+
+    // 비밀번호 만류 여부 ( false : 만료 )
+    @Override
+    public boolean isCredentialsNonExpired() {
+        return true;
+    }
+
+    // 계정 활성화 여부 ( false : 비활성화 )
+    @Override
+    public boolean isEnabled() {
+        return true;
+    }
+
+    // 계정의 권한 목록 리턴
+    @Override
+    public Collection<? extends GrantedAuthority> getAuthorities() {
+        Collection<GrantedAuthority> collections = new ArrayDeque<>();
+        collections.add(() -> "ROLE_" + user.getRole());
+        return collections;
+    }
+}
diff --git a/jpablog/src/main/java/com/example/jpablog/config/auth/PrincipalDetailService.java b/jpablog/src/main/java/com/example/jpablog/config/auth/PrincipalDetailService.java
new file mode 100644
index 00000000..37f01af7
--- /dev/null
+++ b/jpablog/src/main/java/com/example/jpablog/config/auth/PrincipalDetailService.java
@@ -0,0 +1,27 @@
+package com.example.jpablog.config.auth;
+
+import com.example.jpablog.model.User;
+import com.example.jpablog.repository.UserRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class PrincipalDetailService implements UserDetailsService {
+
+    private final UserRepository userRepository;
+
+    // 스프링이 로그인 요청시 username, password 변수 체크
+    // password 는 스프링 시큐리티가 알아서 처리
+    // username 은 DB에 있는지 체크
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        User principal = userRepository.findByUsername(username)
+                .orElseThrow(() -> new UsernameNotFoundException("해당 사용자를 찾을 수 없습니다."));
+
+        return new PrincipalDetail(principal); // 시큐리티 세션에 유저 정보 저장
+    }
+}
diff --git a/jpablog/src/main/java/com/example/jpablog/controller/BoardController.java b/jpablog/src/main/java/com/example/jpablog/controller/BoardController.java
index 589c9d5b..f4206a9d 100644
--- a/jpablog/src/main/java/com/example/jpablog/controller/BoardController.java
+++ b/jpablog/src/main/java/com/example/jpablog/controller/BoardController.java
@@ -1,11 +1,14 @@
 package com.example.jpablog.controller;
 
+import com.example.jpablog.config.auth.PrincipalDetail;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.GetMapping;
 
 @Controller
 public class BoardController {
 
+    // 파라미터로 시큐리티 세션 접근 : @AuthenticationPrincipal PrincipalDetail principal
     @GetMapping("/")
     public String index() {
         return "index";
diff --git a/jpablog/src/main/java/com/example/jpablog/repository/UserRepository.java b/jpablog/src/main/java/com/example/jpablog/repository/UserRepository.java
index 3e97251c..ee875dc4 100644
--- a/jpablog/src/main/java/com/example/jpablog/repository/UserRepository.java
+++ b/jpablog/src/main/java/com/example/jpablog/repository/UserRepository.java
@@ -5,10 +5,13 @@ import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
+import java.util.Optional;
+
 @Repository // 생략가능
 public interface UserRepository extends JpaRepository<User, Long> {
 
-
+    // select * from user where username =?
+    Optional<User> findByUsername(String username);
 
 
 
diff --git a/jpablog/src/main/resources/application.yml b/jpablog/src/main/resources/application.yml
index c0c39ba5..07904d9e 100644
--- a/jpablog/src/main/resources/application.yml
+++ b/jpablog/src/main/resources/application.yml
@@ -22,7 +22,7 @@ spring:
   jpa:
     open-in-view: true
     hibernate:
-      ddl-auto: create
+      ddl-auto: update
 #      naming:
 #        physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
       use-new-id-generator-mappings: false
diff --git a/jpablog/src/main/webapp/WEB-INF/views/user/loginForm.jsp b/jpablog/src/main/webapp/WEB-INF/views/user/loginForm.jsp
index dcc5e215..5be4256e 100644
--- a/jpablog/src/main/webapp/WEB-INF/views/user/loginForm.jsp
+++ b/jpablog/src/main/webapp/WEB-INF/views/user/loginForm.jsp
@@ -3,7 +3,7 @@
 <%@include file="../layout/header.jsp"%>
 
 <div class="container">
-    <form action="#" method="post">
+    <form action="/auth/loginProc" method="post">
         <div class="form-group">
             <label for="username">Username:</label>
             <input name="username" type="text" class="form-control" placeholder="Enter username" id="username">
@@ -12,11 +12,6 @@
             <label for="password">Password:</label>
             <input name="password" type="password" class="form-control" placeholder="Enter password" id="password">
         </div>
-        <div class="form-group form-check">
-            <label class="form-check-label">
-                <input name="remember" class="form-check-input" type="checkbox"> Remember me
-            </label>
-        </div>
         <button id="btn-login" type="submit" class="btn btn-primary">로그인</button>
     </form>
 </div>