diff --git a/src/screens/Register/View.js b/src/screens/Register/View.js
index 162b9c1..1a8d7e9 100644
--- a/src/screens/Register/View.js
+++ b/src/screens/Register/View.js
@@ -5,7 +5,12 @@ import {
   Container,
   FormControl,
   InputLabel,
+  LinearProgress,
   Link,
+  List,
+  ListItem,
+  ListItemIcon,
+  ListItemText,
   MenuItem,
   Paper,
   Select,
@@ -13,6 +18,7 @@ import {
   TextField,
   Typography,
 } from '@mui/material';
+import React from 'react';
 
 import SnackbarIndicator from '../../components/SnackbarIndicator';
 import LoadingIndicator from '../../components/LoadingIndicator';
@@ -23,20 +29,31 @@ import logoImage from '../../assets/if-salas-logo.svg';
 import styles from './styles';
 import { createArrayFrom1ToN } from '../../utils/createArrayFrom1ToN';
 import { COURSES } from '../../utils/constants';
+import { Done } from '@mui/icons-material';
 
 function View({
   isPending,
   isError,
   error,
   layoutType,
+  isPasswordFocusedForTheFirstTime,
   data,
   onChangeInput,
+  onChangePasswordInput,
   onChangeCheckbox,
+  onFocusInput,
   onTryRegister,
   currentYear,
 }) {
-  const { container, paper, boxLogo, boxForm, logoContainer } =
-    styles[layoutType];
+  const {
+    container,
+    paper,
+    boxLogo,
+    boxForm,
+    logoContainer,
+    passwordRulesBox,
+    passwordRulesStrength,
+  } = styles[layoutType];
 
   return (
     <Container sx={container} disableGutters>
@@ -72,7 +89,7 @@ function View({
               type="text"
               value={data.ra}
               onChange={onChangeInput}
-              placeholder="00#####"
+              placeholder="#######"
               InputProps={{
                 inputComponent: InputMask,
               }}
@@ -117,7 +134,6 @@ function View({
                 ))}
               </Select>
             </FormControl>
-            {/* TODO: Add field mask */}
             <TextField
               id="phone"
               name="phone"
@@ -146,9 +162,50 @@ function View({
               label="Senha"
               variant="standard"
               type="password"
-              value={data.password}
-              onChange={onChangeInput}
+              value={data.password.value}
+              onChange={onChangePasswordInput}
+              onFocus={onFocusInput}
             />
+            {isPasswordFocusedForTheFirstTime && (
+              <Box sx={passwordRulesBox}>
+                <p style={passwordRulesStrength}>
+                  Força da senha: {data.password.strength}%
+                </p>
+                <LinearProgress
+                  color={data.password.strength === 100 ? 'success' : 'error'}
+                  variant="determinate"
+                  value={data.password.strength}
+                />
+
+                <List dense>
+                  {data.password.rules.map(rule => (
+                    <ListItem
+                      key={rule.label}
+                      style={{
+                        padding: '0',
+                        color: rule.applied ? 'green' : 'black',
+                      }}
+                    >
+                      <ListItemIcon
+                        style={{
+                          minWidth: '40px',
+                          color: rule.applied ? 'green' : 'black',
+                        }}
+                      >
+                        <Done />
+                      </ListItemIcon>
+                      <ListItemText
+                        primaryTypographyProps={{
+                          fontWeight: rule.applied ? 'bolder' : 'inherit',
+                        }}
+                        primary={rule.label}
+                      />
+                    </ListItem>
+                  ))}
+                </List>
+              </Box>
+            )}
+
             <Stack flexDirection="row" alignItems="center">
               <Checkbox
                 name="termsAgreed"
diff --git a/src/screens/Register/index.js b/src/screens/Register/index.js
index 1f921ae..2c26f03 100644
--- a/src/screens/Register/index.js
+++ b/src/screens/Register/index.js
@@ -5,12 +5,23 @@ import { useDocumentTitle } from '../../hooks/useDocumentTitle';
 import useLayoutType from '../../hooks/useLayoutType';
 
 import View from './View';
+import {
+  hasAtLeastLength,
+  hasLowerCase,
+  hasNumber,
+  hasSpecialChars,
+  hasUpperCase,
+} from '../../utils/validations';
 
 function Register() {
   useDocumentTitle('Criar conta');
   const currentYear = dayjs().year();
   const { register, isPending, isError, error } = useAuthState();
   const layoutType = useLayoutType();
+  const [
+    isPasswordFocusedForTheFirstTime,
+    setIsPasswordFocusedForTheFirstTime,
+  ] = useState(false);
   const [data, setData] = useState({
     firstName: '',
     lastName: '',
@@ -19,12 +30,68 @@ function Register() {
     year: currentYear,
     phone: '',
     email: '',
-    password: '',
+    password: {
+      value: '',
+      strength: 0,
+      rules: [
+        {
+          applied: false,
+          label: 'Pelo menos 8 caracteres.',
+        },
+        {
+          applied: false,
+          label: 'Pelo menos uma letra minúscula.',
+        },
+        {
+          applied: false,
+          label: 'Pelo menos uma letra maiúscula.',
+        },
+        {
+          applied: false,
+          label: 'Pelo menos um caractere especial (Exemplo: @, #, $, %, etc).',
+        },
+        {
+          applied: false,
+          label: 'Pelo menos um número.',
+        },
+      ],
+    },
     termsAgreed: false,
   });
 
   const onTryRegister = () => {
-    register(data);
+    register({ ...data, password: data.password.value });
+  };
+
+  const onChangePasswordInput = e => {
+    const value = e.target.value;
+    const appliedRules = [
+      hasAtLeastLength(value, 8),
+      hasLowerCase(value),
+      hasUpperCase(value),
+      hasSpecialChars(value),
+      hasNumber(value),
+    ];
+
+    setData(prev => ({
+      ...prev,
+      password: {
+        value,
+        strength:
+          (appliedRules.filter(r => r === true).length * 100) /
+          appliedRules.length,
+        rules: prev.password.rules.map((rule, i) => ({
+          ...rule,
+          applied: appliedRules[i],
+        })),
+      },
+    }));
+  };
+
+  const onFocusInput = e => {
+    if (isPasswordFocusedForTheFirstTime) return;
+    const name = e.target.name;
+    setIsPasswordFocusedForTheFirstTime(name === 'password');
   };
 
   const onChangeInput = e => {
@@ -47,9 +114,12 @@ function Register() {
       isError={isError}
       error={error}
       layoutType={layoutType}
+      isPasswordFocusedForTheFirstTime={isPasswordFocusedForTheFirstTime}
       data={data}
       onChangeInput={onChangeInput}
+      onChangePasswordInput={onChangePasswordInput}
       onChangeCheckbox={onChangeCheckbox}
+      onFocusInput={onFocusInput}
       onTryRegister={onTryRegister}
       currentYear={currentYear}
     />
diff --git a/src/screens/Register/styles.js b/src/screens/Register/styles.js
index 8fbd44a..31ffbe1 100644
--- a/src/screens/Register/styles.js
+++ b/src/screens/Register/styles.js
@@ -47,12 +47,27 @@ const desktopBoxForm = {
 
 const logoContainerDesktop = {};
 
+const passwordRulesBoxDesktop = {
+  width: '100%',
+  backgroundColor: '#f2f2f2',
+  border: '1px solid black',
+  padding: '16px',
+};
+
+const passwordRulesStrengthDesktop = {
+  color: 'black',
+  fontSize: '0.9em',
+  marginBottom: '10px',
+};
+
 const desktop = {
   container: desktopContainer,
   paper: desktopPaper,
   boxLogo: desktopBoxLogo,
   boxForm: desktopBoxForm,
   logoContainer: logoContainerDesktop,
+  passwordRulesBox: passwordRulesBoxDesktop,
+  passwordRulesStrength: passwordRulesStrengthDesktop,
 };
 
 // ========== Mobile ==========
@@ -83,12 +98,22 @@ const logoContainerMobile = {
   padding: '20px 16px',
 };
 
+const passwordRulesBoxMobile = {
+  ...passwordRulesBoxDesktop,
+};
+
+const passwordRulesStrengthMobile = {
+  ...passwordRulesStrengthDesktop,
+};
+
 const mobile = {
   container: mobileContainer,
   paper: mobilePaper,
   boxLogo: mobileBoxLogo,
   boxForm: mobileBoxForm,
   logoContainer: logoContainerMobile,
+  passwordRulesBox: passwordRulesBoxMobile,
+  passwordRulesStrength: passwordRulesStrengthMobile,
 };
 
 // ========== Unset ==========
@@ -98,6 +123,8 @@ const unset = {
   boxLogo: null,
   boxForm: null,
   logoContainer: null,
+  passwordRulesBox: null,
+  passwordRulesStrength: null,
 };
 
 const styles = { desktop, mobile, unset };
diff --git a/src/utils/validations.js b/src/utils/validations.js
new file mode 100644
index 0000000..c23916f
--- /dev/null
+++ b/src/utils/validations.js
@@ -0,0 +1,28 @@
+function hasLowerCase(str) {
+  return str.toUpperCase() !== str;
+}
+
+function hasUpperCase(str) {
+  return str.toLowerCase() !== str;
+}
+
+function hasSpecialChars(str) {
+  const specialChars = /[`!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?~]/;
+  return specialChars.test(str);
+}
+
+function hasAtLeastLength(str, length) {
+  return str.length >= length;
+}
+
+function hasNumber(myString) {
+  return /\d/.test(myString);
+}
+
+export {
+  hasLowerCase,
+  hasUpperCase,
+  hasSpecialChars,
+  hasAtLeastLength,
+  hasNumber,
+};