diff --git a/src/utils/auth.ts b/src/utils/auth.ts
new file mode 100644
index 0000000..0def36d
--- /dev/null
+++ b/src/utils/auth.ts
@@ -0,0 +1,89 @@
+// Authentication utility functions
+
+export interface AuthSession {
+  token: string;
+  email: string;
+  userId?: string;
+  expiresAt?: number;
+}
+
+export const authUtils = {
+  // Store session in sessionStorage
+  setSession: (session: AuthSession) => {
+    sessionStorage.setItem('authToken', session.token);
+    sessionStorage.setItem('userEmail', session.email);
+    if (session.userId) {
+      sessionStorage.setItem('userId', session.userId);
+    }
+    if (session.expiresAt) {
+      sessionStorage.setItem('expiresAt', session.expiresAt.toString());
+    }
+  },
+
+  // Get current session from sessionStorage
+  getSession: (): AuthSession | null => {
+    const token = sessionStorage.getItem('authToken');
+    const email = sessionStorage.getItem('userEmail');
+
+    if (!token || !email) {
+      return null;
+    }
+
+    return {
+      token,
+      email,
+      userId: sessionStorage.getItem('userId') || undefined,
+      expiresAt: sessionStorage.getItem('expiresAt')
+        ? parseInt(sessionStorage.getItem('expiresAt')!)
+        : undefined,
+    };
+  },
+
+  // Check if user is authenticated
+  isAuthenticated: (): boolean => {
+    const session = authUtils.getSession();
+    if (!session) return false;
+
+    // Check if session has expired
+    if (session.expiresAt && new Date().getTime() > session.expiresAt) {
+      authUtils.clearSession();
+      return false;
+    }
+
+    return true;
+  },
+
+  // Clear session on logout
+  clearSession: () => {
+    sessionStorage.removeItem('authToken');
+    sessionStorage.removeItem('userEmail');
+    sessionStorage.removeItem('userId');
+    sessionStorage.removeItem('expiresAt');
+  },
+
+  // Persist remember-me preference
+  setRememberMe: (email: string) => {
+    localStorage.setItem('rememberEmail', email);
+  },
+
+  // Get remembered email
+  getRememberedEmail: (): string | null => {
+    return localStorage.getItem('rememberEmail');
+  },
+
+  // Clear remember-me preference
+  clearRememberMe: () => {
+    localStorage.removeItem('rememberEmail');
+  },
+
+  // Validate email format
+  isValidEmail: (email: string): boolean => {
+    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+    return emailRegex.test(email);
+  },
+
+  // Validate password strength
+  isValidPassword: (password: string): boolean => {
+    return password.length >= 6;
+  },
+};