diff --git a/pom.xml b/pom.xml
index df7a6cb36..1563420ba 100644
--- a/pom.xml
+++ b/pom.xml
@@ -143,6 +143,10 @@
             <artifactId>spring-security-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/src/main/java/guru/sfg/brewery/config/SecurityConfig.java b/src/main/java/guru/sfg/brewery/config/SecurityConfig.java
new file mode 100644
index 000000000..05fb8fc3d
--- /dev/null
+++ b/src/main/java/guru/sfg/brewery/config/SecurityConfig.java
@@ -0,0 +1,79 @@
+package guru.sfg.brewery.config;
+
+import guru.sfg.brewery.filter.RestHeaderAuthFilter;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpMethod;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
+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.configuration.WebSecurityConfigurerAdapter;
+import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
+import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
+
+@Configuration
+@EnableWebSecurity
+public class SecurityConfig extends WebSecurityConfigurerAdapter {
+
+    public RestHeaderAuthFilter restHeaderAuthFilter(AuthenticationManager authenticationManager){
+        RestHeaderAuthFilter restHeaderAuthFilter = new RestHeaderAuthFilter(new AntPathRequestMatcher("/api/**"));
+        restHeaderAuthFilter.setAuthenticationManager(authenticationManager);
+        return restHeaderAuthFilter;
+    }
+    // By default, Spring Security turns on csrf protection.
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        http.addFilterBefore(restHeaderAuthFilter(authenticationManager()), UsernamePasswordAuthenticationFilter.class)
+        .csrf().disable();
+        http
+                .authorizeRequests(authorize -> {
+                    authorize
+                            .antMatchers("/h2-console/**").permitAll() // do not use in production
+                            .antMatchers("/", "/webjars/**", "/login", "/resources/**").permitAll()
+                            .antMatchers("/beers/find", "/beers*").permitAll()
+                            .antMatchers(HttpMethod.GET, "/api/v1/beer/**").permitAll()
+                            .mvcMatchers(HttpMethod.GET, "/api/v1/beerUpc/{upc}").permitAll();
+                } )
+                .authorizeRequests()
+                .anyRequest().authenticated()
+                .and()
+                .formLogin().and()
+                .httpBasic();
+
+        // h2 console config
+        http.headers().frameOptions().sameOrigin();
+    }
+
+    // Configuring In Memory Authentication using Authentication Fluent API.
+    @Override
+    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
+        auth.inMemoryAuthentication()
+                .withUser("spring")
+                .password("guru")
+                .roles()
+                .and()
+                .withUser("user")
+                .password("{noop}password")
+                .roles("USER");
+
+    }
+
+    // This is kinda an old way of creating InMemory UserDetails Service. Alternatively, we can use
+    // In Memory Authentication Fluent API. See above
+//    @Override
+//    @Bean
+//    protected UserDetailsService userDetailsService() {
+//        UserDetails admin = User.withDefaultPasswordEncoder()
+//                .username("spring")
+//                .password("guru")
+//                .roles("ADMIN")
+//                .build();
+//        UserDetails user = User.withDefaultPasswordEncoder()
+//                .username("user")
+//                .password("password")
+//                .roles("USER")
+//                .build();
+//        // InMemoryUserDetailsManager implements UserDetailsService thus overriding default UserDetailsService
+//        return new InMemoryUserDetailsManager(admin, user);
+//    }
+}
diff --git a/src/main/java/guru/sfg/brewery/domain/security/Authority.java b/src/main/java/guru/sfg/brewery/domain/security/Authority.java
new file mode 100644
index 000000000..c817d49d4
--- /dev/null
+++ b/src/main/java/guru/sfg/brewery/domain/security/Authority.java
@@ -0,0 +1,22 @@
+package guru.sfg.brewery.domain.security;
+
+import lombok.*;
+
+import javax.persistence.*;
+import java.util.Set;
+
+@Entity
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+@Getter
+@Setter
+public class Authority {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private String role;
+
+    @ManyToMany(mappedBy = "authorities")
+    private Set<User> users;
+}
diff --git a/src/main/java/guru/sfg/brewery/domain/security/User.java b/src/main/java/guru/sfg/brewery/domain/security/User.java
new file mode 100644
index 000000000..28f31dc9a
--- /dev/null
+++ b/src/main/java/guru/sfg/brewery/domain/security/User.java
@@ -0,0 +1,36 @@
+package guru.sfg.brewery.domain.security;
+
+import lombok.*;
+
+import javax.persistence.*;
+import java.util.Set;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+@Entity
+@Builder
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Integer id;
+    private String username;
+    private String password;
+    @Singular
+    @ManyToMany(cascade = CascadeType.MERGE)
+    @JoinTable(name = "user_authority",
+    joinColumns = {@JoinColumn(name = "USER_ID", referencedColumnName = "ID")},
+    inverseJoinColumns = {@JoinColumn(name = "AUTHORITY_ID", referencedColumnName = "ID")})
+    private Set<Authority> authorities;
+    // @Builder.Default - для того, чтобы в @Builder можно было задать дефолтное значение
+    @Builder.Default
+    private Boolean accountNonExpired = true;
+    @Builder.Default
+    private Boolean accountNonLocked = true;
+    @Builder.Default
+    private Boolean credentialsNonExpired = true;
+    @Builder.Default
+    private Boolean enabled = true;
+}
diff --git a/src/main/java/guru/sfg/brewery/filter/RestHeaderAuthFilter.java b/src/main/java/guru/sfg/brewery/filter/RestHeaderAuthFilter.java
new file mode 100644
index 000000000..8e75ed2e3
--- /dev/null
+++ b/src/main/java/guru/sfg/brewery/filter/RestHeaderAuthFilter.java
@@ -0,0 +1,110 @@
+package guru.sfg.brewery.filter;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter;
+import org.springframework.security.web.util.matcher.RequestMatcher;
+import org.springframework.util.StringUtils;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+/**
+ * AbstractAuthenticationProcessingFilter - abstract processor of browser-based HTTP-based authentication requests.
+ * The filter requires that you set the authenticationManager property. An authenticationManager is required to process
+ * the authentication request tokens creating by implementing classes. This filter will intercept a request and attempt
+ * to perform authentication from that request if the request URL matches the value of the filterProcessesUrl property.
+ * This behaviour can be modified by overriding the method requiresAuthentication. Authentication is performed by the
+ * attemptAuthentication method, which must be implemented by subclasses.
+ *
+ * If authentication is successful, the resulting Authentication object will be placed into the SecurityContext
+ * for the current thread, which is guaranteed to have already been created by an earlier filter.
+ * */
+@Slf4j
+public class RestHeaderAuthFilter extends AbstractAuthenticationProcessingFilter {
+
+    public RestHeaderAuthFilter(RequestMatcher requiresAuthenticationRequestMatcher) {
+        super(requiresAuthenticationRequestMatcher);
+    }
+
+    @Override
+    public Authentication attemptAuthentication(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws AuthenticationException, IOException, ServletException {
+
+        String userName = getUsername(httpServletRequest);
+        String password = getPassword(httpServletRequest);
+
+        if (userName == null){
+            userName = "";
+        }
+        if (password == null){
+            password = "";
+        }
+        log.debug("Authenticating user: {}", userName);
+
+        // An Authentication implementation that is designed for simple presentation of a username and a password.
+        // Needed for work with authentication manager.
+        UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(userName, password);
+        // AuthenticationManager is configured as InMemory in fluent api setting
+        if (!StringUtils.isEmpty(userName)){
+            return this.getAuthenticationManager().authenticate(token);
+        }
+        return null;
+    }
+
+    private String getPassword(HttpServletRequest httpServletRequest) {
+        return httpServletRequest.getHeader("Api-Secret");
+    }
+
+    private String getUsername(HttpServletRequest httpServletRequest) {
+        return httpServletRequest.getHeader("Api-Key");
+    }
+
+    @Override
+    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
+        HttpServletRequest request = (HttpServletRequest)req;
+        HttpServletResponse response = (HttpServletResponse)res;
+        if (!this.requiresAuthentication(request, response)) {
+            chain.doFilter(request, response);
+        } else {
+            if (this.logger.isDebugEnabled()) {
+                this.logger.debug("Request is to process authentication");
+            }
+            Authentication authResult = attemptAuthentication(request, response);
+            try {
+                if (authResult != null){
+                    this.successfulAuthentication(request, response, chain, authResult);
+                }else {
+                    chain.doFilter(request, response);
+                }
+            } catch (AuthenticationException e){
+                log.error("Authentication Failed");
+                unsuccessfulAuthentication(request, response, e);
+            }
+        }
+    }
+
+    protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain, Authentication authResult) throws IOException, ServletException {
+        if (this.logger.isDebugEnabled()) {
+            this.logger.debug("Authentication success. Updating SecurityContextHolder to contain: " + authResult);
+        }
+        SecurityContextHolder.getContext().setAuthentication(authResult);
+    }
+
+    protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, AuthenticationException failed) throws IOException, ServletException {
+        SecurityContextHolder.clearContext();
+        if (this.log.isDebugEnabled()) {
+            log.debug("Authentication request failed: " + failed.toString(), failed);
+            log.debug("Updated SecurityContextHolder to contain null Authentication");
+        }
+        response.sendError(HttpStatus.UNAUTHORIZED.value(), HttpStatus.UNAUTHORIZED.getReasonPhrase());
+    }
+}
diff --git a/src/main/java/guru/sfg/brewery/repositories/security/AuthorityRepository.java b/src/main/java/guru/sfg/brewery/repositories/security/AuthorityRepository.java
new file mode 100644
index 000000000..e1b51ac24
--- /dev/null
+++ b/src/main/java/guru/sfg/brewery/repositories/security/AuthorityRepository.java
@@ -0,0 +1,9 @@
+package guru.sfg.brewery.repositories.security;
+
+import guru.sfg.brewery.domain.security.Authority;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface AuthorityRepository extends JpaRepository<Authority, Integer> {
+
+
+}
diff --git a/src/main/java/guru/sfg/brewery/repositories/security/UserRepository.java b/src/main/java/guru/sfg/brewery/repositories/security/UserRepository.java
new file mode 100644
index 000000000..5a27e7802
--- /dev/null
+++ b/src/main/java/guru/sfg/brewery/repositories/security/UserRepository.java
@@ -0,0 +1,11 @@
+package guru.sfg.brewery.repositories.security;
+
+import guru.sfg.brewery.domain.security.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+
+public interface UserRepository extends JpaRepository<User, Integer> {
+
+    Optional<User> findByUsername(String username);
+}
diff --git a/src/main/java/guru/sfg/brewery/services/JpaUserDetailsService.java b/src/main/java/guru/sfg/brewery/services/JpaUserDetailsService.java
new file mode 100644
index 000000000..6e5ecd393
--- /dev/null
+++ b/src/main/java/guru/sfg/brewery/services/JpaUserDetailsService.java
@@ -0,0 +1,49 @@
+package guru.sfg.brewery.services;
+
+import guru.sfg.brewery.domain.security.Authority;
+import guru.sfg.brewery.domain.security.User;
+import guru.sfg.brewery.repositories.security.UserRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+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;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+@RequiredArgsConstructor
+@Service
+public class JpaUserDetailsService implements UserDetailsService {
+
+    private final UserRepository userRepository;
+
+    // We are using @Transactional for executing this method in one Hibernate context so that we do not need
+    // to configure user to load authorities eagerly (we could alternatively do that).
+    @Transactional
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        User user = userRepository.findByUsername(username).orElseThrow(()-> {
+            throw new UsernameNotFoundException("User name: " + username + " not found");
+        });
+        // User из пакета org.springframework.security.core.userdetails.User implements UserDetails interface and is
+        // immutable.
+        return new org.springframework.security.core.userdetails.User(user.getUsername(), user.getPassword(),
+                user.getEnabled(), user.getAccountNonExpired(), user.getCredentialsNonExpired(), user.getAccountNonLocked(),
+                convertToSpringAuthorities(user.getAuthorities()));
+    }
+
+    private Collection<? extends GrantedAuthority> convertToSpringAuthorities(Set<Authority> authorities) {
+        if (authorities != null && authorities.size() > 0){
+            return authorities.stream().map(Authority::getRole).map(SimpleGrantedAuthority::new)
+                    .collect(Collectors.toSet());
+        }else {
+            return new HashSet<>();
+        }
+    }
+}
diff --git a/src/test/java/guru/sfg/brewery/web/controllers/BeerControllerIT.java b/src/test/java/guru/sfg/brewery/web/controllers/BeerControllerIT.java
new file mode 100644
index 000000000..f0ce21823
--- /dev/null
+++ b/src/test/java/guru/sfg/brewery/web/controllers/BeerControllerIT.java
@@ -0,0 +1,78 @@
+package guru.sfg.brewery.web.controllers;
+
+import guru.sfg.brewery.repositories.BeerInventoryRepository;
+import guru.sfg.brewery.repositories.BeerRepository;
+import guru.sfg.brewery.repositories.CustomerRepository;
+import guru.sfg.brewery.services.BeerService;
+import guru.sfg.brewery.services.BreweryService;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.security.test.context.support.WithMockUser;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.httpBasic;
+import static org.springframework.security.test.web.servlet.setup.SecurityMockMvcConfigurers.springSecurity;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+/**
+ * Created by jt on 6/12/20.
+ */
+@WebMvcTest
+public class BeerControllerIT {
+
+
+    // WebApplicationContext will allow us to leverage filters used by Spring Security in order to test authentication
+    @Autowired
+    WebApplicationContext wac;
+
+    MockMvc mockMvc;
+
+    @MockBean
+    BeerRepository beerRepository;
+
+    @MockBean
+    BeerInventoryRepository beerInventoryRepository;
+
+    @MockBean
+    BreweryService breweryService;
+
+    @MockBean
+    CustomerRepository customerRepository;
+
+    @MockBean
+    BeerService beerService;
+
+    @BeforeEach
+    void setUp() {
+        mockMvc = MockMvcBuilders
+                .webAppContextSetup(wac)
+                // activates spring security filters
+                .apply(springSecurity())
+                .build();
+    }
+    // Здесь просто создаем мокового юзера с username spring.
+    @WithMockUser("spring")
+    @Test
+    void findBeers() throws Exception{
+        mockMvc.perform(get("/beers/find"))
+                .andExpect(status().isOk())
+                .andExpect(view().name("beers/findBeers"))
+                .andExpect(model().attributeExists("beer"));
+    }
+
+    // Здесь с помощью метода with() теперь проверяем базовую аутентификацию.
+    @Test
+    void findBeersWithHttpBasic() throws Exception{
+        mockMvc.perform(get("/beers/find").with(httpBasic("spring", "guru")))
+                .andExpect(status().isOk())
+                .andExpect(view().name("beers/findBeers"))
+                .andExpect(model().attributeExists("beer"));
+    }
+
+}
diff --git a/src/test/java/guru/sfg/brewery/web/controllers/BeerControllerTest.java b/src/test/java/guru/sfg/brewery/web/controllers/BeerControllerTest.java
index 0efa7484d..196bef31b 100644
--- a/src/test/java/guru/sfg/brewery/web/controllers/BeerControllerTest.java
+++ b/src/test/java/guru/sfg/brewery/web/controllers/BeerControllerTest.java
@@ -30,6 +30,7 @@
 import org.springframework.data.domain.PageImpl;
 import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Sort;
+import org.springframework.security.web.AuthenticationEntryPoint;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.setup.MockMvcBuilders;
 
@@ -105,6 +106,7 @@ void showBeer() throws Exception{
                 .andExpect(model().attribute("beer", hasProperty("id", is(uuid))));
     }
 
+    AuthenticationEntryPoint
     @Test
     void initCreationForm() throws Exception {
         mockMvc.perform(get("/beers/new"))