Mobile App PCI DSS Compliance

Jan 22, 2024

19 Min Read

1. What is PCI DSS compliance and how does it apply to mobile apps?


PCI DSS (Payment Card Industry Data Security Standard) is a set of security standards for handling credit and debit card information. It applies to any organization that processes, stores, or transmits cardholder data.

For mobile apps, PCI DSS compliance means ensuring that the mobile app’s handling of cardholder data and payment transactions is secure and in line with the PCI DSS requirements. This includes the app’s authorization, encryption, storage, and transmission of sensitive data such as credit card numbers.

2. What are the key requirements for achieving PCI DSS compliance?

– Data Encryption: All sensitive data should be encrypted when stored or transmitted over public networks.
– Secure Network: The app should be protected by firewalls and other security measures to prevent unauthorized access.
– User Authentication: Strong authentication methods should be implemented to ensure only authorized users can access the app.
– Regular Vulnerability Scans: The app should undergo regular vulnerability scans by an approved scanning vendor (ASV) to identify potential security flaws.
– Access Control: Access to cardholder data in the app should be restricted based on authorization levels.
– Monitoring and Logging: The app should have logging in place to track access to sensitive data, monitor for any suspicious activity, and retain logs for at least one year.
– Secure Development Practices: All developers involved in building the app must follow secure coding guidelines and best practices.
– Compliance Reporting: Annual reports and self-assessments must be submitted to validate compliance with PCI DSS standards.

3. Are all mobile apps required to be PCI DSS compliant?

No, not all mobile apps are required to be PCI DSS compliant. However, any mobile app that handles credit or debit card information is subject to these regulations. This includes:

– Mobile apps developed by organizations that directly accept credit or debit cards as payment
– Apps developed by organizations that store or transmit cardholder data on behalf of others
– Apps that integrate with third-party payment processing services that require handling of cardholder data

4. What are the consequences of non-compliance with PCI DSS?

Failure to comply with PCI DSS standards can result in severe consequences, including fines, penalties, and legal action. If a data breach occurs as a result of non-compliance, the organization may also face reputational damage and loss of customer trust.

In addition, major credit card companies may impose fines on organizations that experience a data breach while not being compliant with PCI DSS standards. These fines can range from thousands to millions of dollars depending on the severity and number of breaches.

5. How can mobile apps achieve and maintain PCI DSS compliance?

To achieve and maintain PCI DSS compliance for your mobile app, it is recommended to work with a Qualified Security Assessor (QSA) who specializes in mobile app security. This QSA will review your app’s security measures and processes, perform vulnerability scans, assess its compliance with the PCI DSS requirements, and provide recommendations for remediation if needed.

It is also important for organizations to regularly update their app’s security practices based on changes in technology and new regulations. This includes conducting regular vulnerability scans, implementing secure coding practices, and staying informed about any updates or changes to the PCI DSS standard.

2. What are the key requirements for a mobile app to be PCI DSS compliant?


1. Secure Network: Mobile apps transmitting cardholder data must have a secure network connection, such as an SSL encryption, to ensure the protection of sensitive information.

2. Secure Data Storage: Any cardholder data stored on the mobile device must be encrypted and securely stored to prevent unauthorized access.

3. Access Controls: Strong authentication and authorization methods should be implemented to restrict access to only authorized users with valid credentials.

4. Regular Security Updates: The mobile app should have regular security updates to address any known vulnerabilities or weaknesses.

5. Protection Against Malware: Measures should be in place to protect the app from malware attacks that could compromise the security of cardholder data.

6. Compliance with App Store Guidelines: The app must comply with the rules and guidelines set by the specific app store it is listed on, such as Apple’s App Store or Google Play Store.

7. Device-Level Security: Device-specific security features, such as passcodes, biometric authentication, and remote wiping capabilities, should be utilized to prevent unauthorized access if a device is lost or stolen.

8. User Awareness: Cardholders using the mobile app should receive education and awareness about safe practices for protecting their personal information and preventing fraud.

9. Compliance Validation: The mobile app must undergo regular compliance validation assessments conducted by a PCI DSS Qualified Security Assessor (QSA) or Internal Security Assessor (ISA).

10. Compliance Documentation: Documentation detailing how the mobile app meets the PCI DSS requirements should be kept up-to-date and readily available for review by assessors or auditors.

3. Can a mobile app store or transmit credit card information without being PCI DSS compliant?

No, a mobile app cannot store or transmit credit card information without being PCI DSS compliant. All organizations that handle credit card data must be PCI DSS compliant in order to ensure the security of sensitive information. Failure to comply with the PCI DSS can result in fines and potential legal action.

4. How are mobile apps audited for PCI DSS compliance?


Mobile apps can be audited for PCI DSS compliance through the following steps:

1. Identify the scope: The first step in auditing a mobile app for PCI DSS compliance is to determine the boundaries and components of the app that are involved in handling payment card data.

2. Review coding practices: A thorough review of the application’s source code can help identify any potential vulnerabilities or weaknesses that could compromise the security of cardholder data. This includes checking for secure coding practices, encryption methods used, and any third-party libraries or APIs used.

3. Penetration testing: A penetration test involves simulating an attack on the app to identify vulnerabilities and validate its security controls. This includes testing for common security flaws such as SQL injections, cross-site scripting (XSS), and insecure storage of sensitive data.

4. Network vulnerability assessment: This involves scanning the network traffic between the app and its server to check for any unencrypted transmission of cardholder data.

5. Encryption review: As per PCI DSS requirement 3, all payment card information must be encrypted during transmission over public networks. Thus, a review of encryption methods used by the app is essential.

6. Compliance with payment industry standards: Mobile apps must comply with industry standards such as Payment Application Data Security Standard (PA-DSS) to ensure their security controls meet industry requirements.

7. Physical security checks: If the mobile app uses physical payment terminals (e.g., chip readers), then audits should also include reviews of their physical security controls, such as tamper-proofing and access control.

8. Documentation review: The auditor will also review documentation related to the development and maintenance of the mobile app to ensure proper procedures have been followed throughout its life cycle.

9. Reporting and remediation: After completing all necessary assessments and tests, a detailed report will be provided with recommendations for improvement or remediation if any issues are identified.

10. Follow-up audits: PCI DSS compliance is an ongoing process, and regular audits must be conducted to ensure the app remains compliant over time.

Overall, auditing for PCI DSS compliance for mobile apps is a comprehensive process that involves reviewing all aspects of the app’s development, security controls, and network interactions to ensure the protection of cardholder data.

5. Are there specific encryption requirements for credit card data stored in a mobile app?


Yes, there are specific encryption requirements for credit card data stored in a mobile app. The Payment Card Industry Data Security Standard (PCI DSS) mandates that all sensitive credit card information must be encrypted both in transit and at rest. This includes data such as the card number, CVV, and expiration date.

The encryption standard used must be strong and industry-recognized, such as AES 256-bit encryption. Mobile apps must also implement strong access controls to ensure that only authorized users have access to the encrypted data.

Furthermore, if the mobile app uses a third-party payment processor or gateway to handle transactions, they must ensure that their services are also PCI compliant. It is important for mobile app developers to regularly review and update their security measures to stay compliant with the latest PCI DSS guidelines.

6. What steps should a developer take to ensure their mobile app is secure and meets PCI DSS standards?

There are several steps that a developer can take to ensure their mobile app is secure and meets PCI DSS (Payment Card Industry Data Security Standard) standards:

1. Understand PCI DSS Requirements: The first step is to thoroughly understand the requirements set forth by PCI DSS. This includes identifying all payment card data storage and processing functions in the app and understanding the specific security requirements for each function.

2. Use Secure Coding Practices: Developers should use secure coding practices, such as input validation, error handling, and encryption, to prevent common vulnerabilities like SQL injection and cross-site scripting (XSS).

3. Implement Encryption: All sensitive data should be encrypted using strong encryption methods both while in transit and when stored on the device or servers.

4. Use Strong Authentication Measures: The app should implement strong authentication measures, such as two-factor authentication or biometric authentication, to ensure only authorized users have access to payment card data.

5. Limit Access to Payment Card Data: To reduce the risk of unauthorized access to payment card data, developers should limit access levels within the app based on user roles and permissions.

6. Regularly Test for Vulnerabilities: Developers should regularly perform vulnerability assessments and penetration testing on their app to identify any potential weaknesses in security.

7. Keep Software Up-to-Date: It is important for developers to keep all software components used in the app up-to-date with the latest security patches and updates.

8. Comply with App Store Guidelines: App stores have their own guidelines for protecting user data, so developers should ensure their app complies with these guidelines as well.

9. Educate Users on Security Best Practices: Developers should educate users on best practices for keeping their devices secure, such as setting strong passwords and avoiding public Wi-Fi networks when making transactions.

10. Work with a Qualified Security Assessor (QSA): To ensure full compliance with PCI DSS standards, it may be beneficial for developers to work with a qualified security assessor (QSA) who can provide guidance and assistance throughout the development process.

7. How can a company ensure their third-party payment processing SDK is PCI compliant?

To ensure that their third-party payment processing SDK is PCI compliant, the company can follow these steps:

1. Choose a PCI-compliant provider: The first step is to make sure that the payment processor you are considering is already PCI compliant. This information can be found on their website or through industry-approved lists of compliant providers.

2. Implement secure coding practices: The company must ensure that any custom code they add to the SDK follows secure coding guidelines and practices recommended by the Payment Card Industry Security Standards Council (PCI SSC).

3. Use encryption and tokenization: Encryption and tokenization are key features for securing credit card data during transmission and storage. Make sure your SDK uses these technologies to protect sensitive payment information.

4. Regularly update the SDK: Payment processors often release updates to their SDKs to address security vulnerabilities, fix bugs, and add new features. It is important for the company to regularly update the SDK they are using in their app to ensure it remains PCI compliant.

5. Conduct regular security audits: The company should perform regular security audits of their app and the integrated third-party payment processing SDK to identify any potential vulnerabilities that could compromise PCI compliance.

6. Monitor network activity: Monitoring network activity can help detect any unauthorized access attempts or suspicious activity related to credit card data processed through the SDK.

7. Follow PCI DSS requirements: Companies should also carefully review and adhere to all relevant PCI DSS requirements when integrating a third-party payment processing SDK into their app. These requirements include things like secure authentication methods, encryption, and access controls.

By following these steps, a company can ensure that their third-party payment processing SDK is compliant with all necessary PCI standards, providing a secure and reliable way for customers to make payments through their app.

8. Is there any difference between iOS and Android apps when it comes to PCI compliance?


Yes, there are several differences between iOS and Android apps when it comes to PCI compliance.

1. App Validation Process:
The app validation process for iOS and Android apps is different. Apple has a rigorous review process for all apps submitted to the App Store, which includes checking for compliance with PCI DSS requirements. On the other hand, Google Play Store does not have a similar review process, making it easier for non-compliant apps to be available for download.

2. In-App Payment Processing:
iOS and Android both have their own payment processing mechanisms – Apple Pay and Google Pay respectively. Both of these mechanisms are considered secure by PCI standards, but the implementation may differ between each platform, so developers need to ensure compliance with specific guidelines for each platform.

3. Security Protocols:
Android apps use Java or Kotlin language and iOS apps use Swift or Objective-C language. The security protocols required for each programming language may differ slightly, thus developers need to take this into consideration when building their app.

4. Device Security Measures:
iOS devices have a reputation for being more secure than Android devices due to Apple’s strict control over hardware and software on its devices. This can be an advantage in terms of PCI compliance as it reduces the chances of sensitive data being compromised through malicious third-party apps.

5. Card Storage:
Both iOS and Android have strict rules regarding storing credit card information within the app. However, Apple requires developers to obtain explicit user consent for storing sensitive information like credit card numbers while on Android it is up to the developer’s discretion.

6. Handling Data Breaches:
In case of a data breach, both iOS and Android platforms require the disclosure of any security incidents that result in unauthorized access or theft of sensitive data from an app. However, in certain cases involving high-risk breaches, the disclosure requirements may vary between platforms.

It’s important for developers to understand these differences and follow guidelines specific to each platform when developing mobile payment apps to ensure PCI compliance.

9. Can a single mobile app be used for both ecommerce and in-store transactions while remaining compliant with the PCI DSS standard?

Yes, it is possible for a single mobile app to be used for both ecommerce and in-store transactions while remaining compliant with the PCI DSS (Payment Card Industry Data Security Standard). However, this requires careful planning and implementation to ensure that all the necessary security measures are in place to protect cardholder data during both types of transactions.

Here are some factors to consider when developing a mobile app for both ecommerce and in-store transactions:

1. Separate Payment Processes: The first step towards compliance is ensuring that separate payment processes are used for ecommerce and in-store transactions. This means that different methods of collecting payment information should be used, such as a secure online payment gateway for ecommerce and an EMV-enabled card reader for in-store transactions.

2. Encryption: All sensitive data, including cardholder data, should be encrypted during transmission between the mobile app and the payment processor. This includes both online and offline encryption to protect the data from potential breaches.

3. Tokenization: Using tokenization technology can help further secure cardholder data by replacing it with a unique token that is meaningless outside of the payment process. This way, even if a hacker were to intercept the transaction data, they would not be able to use it for fraudulent purposes.

4. Restricting Access: Only authorized users with specific login credentials should have access to sensitive payment information within the mobile app. This helps prevent unauthorized individuals from accessing or manipulating transaction data.

5. Regular Testing: It is essential to regularly test the security measures put in place within the mobile app to ensure they are still effective in protecting against potential attacks or breaches.

6. Compliance Verification: One of the requirements for PCI DSS compliance is regular verification of compliance by a qualified security assessor (QSA). Companies using a single mobile app for both ecommerce and in-store transactions should undergo this verification process on a regular basis.

Overall, creating a secure environment for processing both ecommerce and in-store transactions within a single mobile app requires careful consideration and implementation of various security measures. By following the PCI DSS requirements and regularly testing and verifying compliance, it is possible to achieve compliance while providing a seamless experience for customers using the mobile app for both types of transactions.

10. Are there any specialized tools or services available to help developers achieve and maintain PCI compliance for their app?


Yes, there are several specialized tools and services available to help developers achieve and maintain PCI compliance for their app. Some examples include:

1. Payment Gateways: A payment gateway is a service that enables businesses to accept credit and debit card payments online. Many payment gateways offer features such as tokenization and encryption to help ensure the security of cardholder data.

2. Tokenization Services: Tokenization is the process of replacing sensitive data with unique identification symbols, known as tokens. This helps minimize the risk of exposing customer’s sensitive information, while still allowing businesses to process payments securely.

3. PCI Compliance Tools: There are various tools available specifically designed to help businesses achieve and maintain PCI compliance. These tools often include vulnerability scanning, network monitoring, and other security features.

4. PCI Compliance Consultants: For businesses that may not have the resources or expertise to achieve PCI compliance on their own, there are consultants who specialize in helping businesses navigate the complex requirements of PCI DSS.

5. Security Auditing Services: Companies that offer security auditing services can perform in-depth assessments of your app’s security measures and identify any potential vulnerabilities or areas where improvements are needed to meet PCI requirements.

Overall, it is important for developers to choose a combination of these specialized tools and services based on their specific needs and budget in order to achieve and maintain PCI compliance for their app.

11. What type of documentation is required to prove an app’s compliance with the PCI DSS standard?

To demonstrate compliance with the PCI DSS standard, an app would need to provide documentation such as a formal security policy, network architecture diagrams, and documentation of security controls implemented. This could include evidence of regular vulnerability scans and penetration tests, as well as documentation showing adherence to specific requirements such as encryption standards and access control measures. Additionally, compliance validation from a certified Qualified Security Assessor (QSA) or approved Self-Assessment Questionnaire (SAQ) may also be required.

12. Can a small business selling goods or services through a mobile app be exempt from PCI DSS compliance requirements?

No, a small business selling goods or services through a mobile app would not be exempt from PCI DSS compliance requirements. Any business that accepts and processes payment cards is subject to the PCI Data Security Standards (PCI DSS). However, there may be different levels of compliance based on the volume of transactions and other factors. Small businesses should consult with their payment processor or a PCI compliance expert to determine their specific compliance obligations.

13. Is regular testing necessary to maintain ongoing compliance of a mobile app with the PCI DSS standard?

Yes, regular testing is necessary to maintain ongoing compliance with the PCI DSS standard for a mobile app. This includes conducting vulnerability scans and penetration tests on a regular basis, as well as ensuring that updates and patches are applied promptly to address any identified vulnerabilities. It is important to regularly review and test all aspects of the app’s security controls, including authentication processes, encryption techniques, network configurations, and access controls. By conducting regular testing and taking proactive measures to address any issues, organizations can ensure that their mobile app remains compliant with the PCI DSS standard.

14. Are there any penalties for non-compliance with the PCI DSS standard for mobile apps?


Yes, there can be penalties for non-compliance with the PCI DSS standard for mobile apps. These penalties can include fines, loss of ability to process credit card payments, and damage to a company’s reputation. Additionally, if a data breach occurs due to non-compliance, the company may be liable for any damages or losses suffered by their customers. It is important for companies to ensure that their mobile apps are compliant with the PCI DSS standard to protect both their customers and their business.

15. How do updates and new versions of an app affect its overall compliance with the PCI DSS standard?


Updates and new versions of an app can have a significant impact on its overall compliance with the PCI DSS standard. As technology and security standards evolve, updates and new versions of an app may include improvements to address any known vulnerabilities or weaknesses that could compromise cardholder data.

In addition, updates and new versions may also include changes to comply with the requirements of the PCI DSS standard itself. For example, if a new requirement is added to the standard, app developers may need to update their app to ensure it meets these new requirements.

Furthermore, updates and new versions may also fix any issues or bugs that could potentially lead to non-compliance with the PCI DSS standard. It is important for businesses to regularly review and update their apps in order to maintain compliance with the latest version of the standard.

Overall, keeping apps updated with the latest security measures and complying with the most current version of the PCI DSS standard is crucial in ensuring the protection of cardholder data and maintaining compliance.

16. Are there any specific security measures that need to be implemented for an app to comply with the latest version of thePCI DSS standard?

Yes, there are several security measures that need to be implemented for an app to comply with the latest version of the PCI DSS standard. These include:

1. Secure Coding Practices: Apps must be built using secure coding practices to prevent common vulnerabilities such as SQL injections and cross-site scripting.

2. Encryption: All sensitive data such as credit card numbers, CVV codes, and cardholder information must be encrypted both in transit and at rest.

3. Network Security: Apps must have a secure network architecture to prevent unauthorized access. This includes firewalls, intrusion detection systems, and regular vulnerability scanning.

4. Access Control: Access to the app’s infrastructure should be restricted only to authorized personnel. This includes implementing strong password policies, multi-factor authentication, and least privilege access.

5. Data Protection: App developers must implement measures such as masking or truncation of sensitive data to minimize the risk of data compromise.

6. Patch Management: The app must have a process in place for regularly updating and patching any known vulnerabilities in its software or libraries.

7. Logging and Monitoring: The app should have logging mechanisms in place to track user activity and detect any potential security incidents in real-time.

8. Incident Response Plan: In case of a security incident, the app must have an incident response plan in place to contain the breach and mitigate any damage.

9. Regular Security Audits: Apps that handle payment card information are required to undergo regular security audits by qualified security assessors (QSA).

10. Compliance with Other Relevant Standards: In addition to PCI DSS compliance, apps may also need to comply with other relevant standards such as General Data Protection Regulation (GDPR) or HIPAA if they handle personal or medical information respectively.

17. Is there any liability associated with maintaining a non-compliant mobile app that handles credit card information?


Yes, there is potential liability associated with maintaining a non-compliant mobile app that handles credit card information. The app may be subject to fines and penalties from credit card companies or regulatory agencies. Additionally, if the app is found to be responsible for a data breach or compromise of sensitive credit card information, the app owner could face legal action from affected customers. It is important for businesses to ensure their mobile apps are compliant with industry standards and regulations related to handling credit card information to avoid potential liability.

18. Does using third-party payment processors increase or decrease the complexity of achieving and maintaining PCI compliance for an app?


Using third-party payment processors can decrease the complexity of achieving and maintaining PCI compliance for an app because it shifts the responsibility of handling and storing sensitive payment information to the third-party provider. This reduces the scope of PCI requirements that the app is responsible for, making compliance easier to achieve and maintain. However, the app is still responsible for ensuring that the integration with the payment processor is secure and compliant with all relevant standards.

19. Are there any specific training or certification courses for developers to learn about PCI DSS compliance for mobile apps?


Yes, there are training and certification courses available for developers to learn about PCI DSS compliance for mobile apps. Some examples include the PCI SSC’s Qualified Security Assessor (QSA) training program and the Payment Card Industry Professional (PCIP) certification program. Additionally, there are various online courses and resources offered by organizations such as SANS Institute and Udemy that specialize in teaching developers about PCI DSS compliance for mobile apps.

20. What are the consequences of a data breach in a mobile app that is not PCI DSS compliant?


1. Financial Loss: A data breach can result in financial loss for the company and its customers. This can happen due to theft of credit card information, which can be used for fraudulent transactions.

2. Reputation Damage: A data breach in a mobile app that is not PCI DSS compliant can damage the company’s reputation and erode consumer trust. Customers may lose confidence in the company’s ability to secure their sensitive information, leading to a loss of business and potential lawsuits.

3. Legal Consequences: Non-compliance with PCI DSS standards can result in hefty fines and penalties from regulatory bodies such as the Payment Card Industry Security Standards Council (PCI SSC) and other legal consequences. Companies may also face lawsuits from affected individuals or groups, adding to the overall cost of the breach.

4. Customer Churn: The aftermath of a data breach may cause customers to switch to competitors who prioritize security and compliance. This churn rate directly impacts the company’s revenue and growth.

5. Cost of Remediation: In addition to potential fines and lawsuits, companies may also incur significant costs in remediation efforts after a data breach. This includes investigation costs, hiring forensic experts, implementing security measures, notifying affected individuals, and providing identity theft protection services.

6. Disruption of Business Operations: A data breach can disrupt normal business operations as the focus shifts towards solving the issue at hand. This can lead to productivity losses and delays in delivering products or services to customers.

7. Damage to Partnerships: Non-compliance with PCI DSS standards can also damage existing partnerships with other businesses that require secure handling of sensitive information. This can further impact revenue and credibility in the market.

Overall, a data breach in a mobile app that is not PCI DSS compliant can have significant financial, legal, operational, and reputational consequences for a company. It is essential for businesses to prioritize compliance with these standards to protect their customers’ sensitive information and maintain trust in their brand.

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