Ensuring the security of applications is crucial to protect information and guarantee user safety. Here are some steps that can be taken to ensure application security:

1. Threat Assessment: Analyze potential threats that the application may face. Identify possible vulnerabilities and weak points.

2. Use HTTPS: Implement encrypted communication via HTTPS to secure user data during transmission.

3. Input Validation: Conduct thorough validation of all inputs received by applications to prevent code injection attacks and similar exploits.

4. Software and Framework Updates: Regularly update all software and frameworks to the latest versions to patch security vulnerabilities.

5. Identity and Access Management: Define access permissions for each user according to business needs and prevent unauthorized access.

6. Data Encryption: Use encryption techniques to protect sensitive data when stored in databases or during transmission.

7. Penetration Testing: Periodically perform penetration testing to detect and rectify security vulnerabilities.

8. Protection from Side-Channel Attacks: Implement measures to protect against side-channel attacks such as timing attacks and power attacks.

9. Security Code Review: Conduct regular code reviews to identify and address potential security vulnerabilities.

10. Protection from CSRF and XSS Attacks: Utilize techniques like CSRF tokens and input validation to safeguard against Cross-Site Request Forgery (CSRF) and Cross-Site Scripting (XSS) attacks.

11. Security Policy Updates: Update and enhance security policies to cover changes in the technological environment and improve protection levels.

12. Employee Training: Provide regular training for employees on software security practices and continuously update it.

For application security to be an ongoing process, it requires vigilance and dedication to achieve data and user protection.