How to Enforce Strong ECC Signature in Android Apps

Last updated May 21, 2024 by Appdome

Learn to Enforce Strong ECC Signature in Android apps, in mobile CI/CD with a Data-Driven DevSecOps™ build system.

What is an ECC Signature?

An ECC (Elliptic Curve Cryptography) Signature is a digital signature mechanism that uses the principles of elliptic curve mathematics to provide high levels of security with relatively small key sizes. This type of signature involves generating a pair of keys: a private key, which is kept secret by the owner, and a public key, which can be distributed widely. The process of creating an ECC signature includes hashing the message to be signed and then using the private key to generate a signature that is made up of two integers. Verification of this signature is performed using the public key, ensuring that the message has not been tampered with and confirming the identity of the sender. ECC signatures are prized for their efficiency and security, making them particularly suitable for use in environments with limited computational resources, such as mobile devices.

How Do Strong ECC Signatures Protect Android Apps?

Strong ECC signatures provide robust security for Android apps by ensuring the authenticity and integrity of the app and its data. These signatures verify the identity of the app or its components, confirming that the app has not been tampered with and comes from a trusted source. ECC offers an advantage over traditional methods by using smaller size keys for the same level of protection, making the process faster and more efficient. Additionally, ECC’s cryptography is more resistant to hacking, making it harder to forge these digital signatures. By signing data, ECC signatures guarantee that any modification to that data will result in a different signature, thus preserving data integrity.

When combined with Appdome’s Secure Certificate Pinning feature, strong ECC signatures further enhance security by ensuring that the app only communicates with trusted servers.

Note: For enhanced security, it is recommended that ECC keys be at least 256 bits long.

Prerequisites for Using Enforce Strong ECC Signature :

To use Appdome’s mobile app security build system to Enforce Strong ECC Signature , you’ll need:

Enforce Strong ECC Signature on Android apps using Appdome

On Appdome, follow these 3 simple steps to create self-defending Android Apps that Enforce Strong ECC Signature without an SDK or gateway:

  1. Upload the Mobile App to Appdome.

    1. Upload an app to Appdome’s Mobile App Security Build System

    2. Upload Method: Appdome Console or DEV-API
    3. Android Formats: .apk or .aab
    4. Enforce Strong ECC Signature Compatible With: Java, JS, C++, C#, Kotlin, Flutter, React Native, Unity, Xamarin, Cordova and other Android apps
  2. Build the feature: Enforce Strong ECC Signature .

    1. Building Enforce Strong ECC Signature by using Appdome’s DEV-API:

      1. Create and name the Fusion Set (security template) that will contain the Enforce Strong ECC Signature feature as shown below:
      2. fusion set that contains Enforce Strong ECC Signature

        Figure 1: Fusion Set that will contain the Enforce Strong ECC Signature feature
        Note: Naming the Fusion Set to correspond to the protection(s) selected is for illustration purposes only (not required).

      3. Follow the steps in Sections 2.2.1-2.2.2 of this article, Building the Enforce Strong ECC Signature feature via Appdome Console, to add the Enforce Strong ECC Signature feature to this Fusion Set.

      4. Open the Fusion Set Detail Summary by clicking the “...” symbol on the far-right corner of the Fusion Set. Copy the Fusion Set ID from the Fusion Set Detail Summary (as shown below): fusion Set Detail Summary image

        Figure 2: Fusion Set Detail Summary
        Note: Annotating the Fusion Set to identify the protection(s) selected is optional only (not mandatory).

      5. Follow the instructions below to use the Fusion Set ID inside any standard mobile DevOps or CI/CD toolkit like Bitrise, App Center, Jenkins, Travis, Team City, Circle CI or other system:
        1. Build an API for the app – for instructions, see the tasks under Appdome API Reference Guide
        2. Look for sample APIs in Appdome’s GitHub Repository
    2. Building the Enforce Strong ECC Signature feature via Appdome Console

      To build the Enforce Strong ECC Signature protection by using Appdome Console, follow the instructions below.

      1. Where: Inside the Appdome Console, go to Build > Security Tab > Secure Communication section.
      2. How: Check whether is toggled On (enabled), otherwise enable it . The feature Enforce Strong ECC Signature is enabled by default, as shown below. Toggle (turn ON) Enforce Strong ECC Signature , as shown below.
        If needed, Customize the Threat Notification to be displayed to the mobile end-user in a standard OS dialog notification when Appdome Enforces Strong ECC Signature .
        Enforce Strong ECC Signature  option

        Figure 3: Enforce Strong ECC Signature option
        Note: The App Compromise Notification contains an easy to follow default remediation path for the mobile app end user. You can customize this message as required to achieve brand specific support, workflow or other messaging.

      3. When you select the Enforce Strong ECC Signature you'll notice that your Fusion Set you created in step 2.1.1 now bears the icon of the protection category that contains Enforce Strong ECC Signature

        Fusion Set applied Enforce Strong ECC Signature

        Figure 4: Fusion Set that displays the newly added Enforce Strong ECC Signature protection

      4. Select the Threat-Event™ in-app mobile Threat Defense and Intelligence policy for Enforce Strong ECC Signature :
        1. Threat-Events™ OFF > In-App Defense

          If the Threat-Events™ setting is cleared (not selected). Appdome will detect and defend the user and app by enforcing Enforce Strong ECC Signature .

        2. Threat-Events™ ON > In-App Detection

          When this setting is used, Appdome detects the use of a weak certificate signature and passes Appdome’s Threat-Event™ attack intelligence to the app’s business logic for processing, enforcement, and user notification. For more information on consuming and using Appdome Threat-Events™ in the app, see section Using Threat-Events™ for Enforce Strong ECC Signature Intelligence and Control in Mobile Apps.

        3. Threat-Events™ ON > In-App Defense

          When this setting is used, Appdome detects and defends against Strong ECC Signature (same as Appdome Enforce) and passes Appdome’s Threat-Event™ attack intelligence the app’s business logic for processing. For more information on consuming and using Appdome Threat-Events™ in the app, see section Using Threat-Events™ for Enforce Strong ECC Signature Intelligence and Control in Mobile Apps.

      5. Click Build My App at the bottom of the Build Workflow (shown in Figure 3).
    Congratulations!  The Enforce Strong ECC Signature protection is now added to the mobile app
  3. Certify the Enforce Strong ECC Signature feature in Android Apps

    After building Enforce Strong ECC Signature , Appdome generates a Certified Secure™ certificate to guarantee that the Enforce Strong ECC Signature protection has been added and is protecting the app. To verify that the Enforce Strong ECC Signature protection has been added to the mobile app, locate the protection in the Certified Secure™ certificate as shown below: Enforce Strong ECC Signature  shown in Certificate secure

    Figure 5: Certified Secure™ certificate

    Each Certified Secure™ certificate provides DevOps and DevSecOps organizations the entire workflow summary, audit trail of each build, and proof of protection that Enforce Strong ECC Signature has been added to each Android app. Certified Secure provides instant and in-line DevSecOps compliance certification that Enforce Strong ECC Signature and other mobile app security features are in each build of the mobile app

Using Threat-Events™ for Strong ECC Signature Intelligence and Control in Android Apps

Appdome Threat-Events™ provides consumable in-app mobile app attack intelligence and defense control when Strong ECC Signature is detected. To consume and use Threat-Events™ for Strong ECC Signature in Android Apps, use registerReceiver in the Application OnCreate, and the code samples for Threat-Events™ for Strong ECC Signature shown below.

The specifications and options for Threat-Events™ for Strong ECC Signature are:

Threat-Event™ Elements Enforce Strong ECC Signature Method Detail
Appdome Feature Name Enforce Strong ECC Signature
Threat-Event Mode
OFF, IN-APP DEFENSE Appdome detects, defends and notifies user (standard OS dialog) using customizable messaging.
ON, IN-APP DETECTION Appdome detects the attack or threat and passes the event in a standard format to the app for processing (app chooses how and when to enforce).
ON, IN-APP DEFENSE Uses Appdome Enforce mode for any attack or threat and passes the event in a standard format to the app for processing (gather intel on attacks and threats without losing any protection).
Certified Secure™ Threat Event Check
Visible in ThreatScope™
Developer Parameters for Enforcing Strong ECC Signature Threat-Event™
Threat-Event NAME SslInvalidMinECCSignature
Threat-Event DATA reasonData
Threat-Event CODE reasonCode
Threat-Event REF 6801
Threat-Event SCORE
currentThreatEventScore Current Threat-Event score
threatEventsScore Total Threat-events score
Threat-Event Context Keys
message Message displayed for the user on event
failSafeEnforce Timed enforcement against the identified threat
externalID The external ID of the event which can be listened via Threat Events
osVersion OS version of the current device
deviceModel Current device model
deviceManufacturer The manufacturer of the current device
fusedAppToken The task ID of the Appdome fusion of the currently running app
kernelInfo Info about the kernel: system name, node name, release, version and machine.
carrierPlmn PLMN of the device. Only available for Android devices.
deviceID Current device ID
reasonCode Reason code of the occurred event
buildDate Appdome fusion date of the current application
devicePlatform OS name of the current device
carrierName Carrier name of the current device. Only available for Android.
updatedOSVersion Is the OS version up to date
deviceBrand Brand of the device
deviceBoard Board of the device
buildUser Build user
buildHost Build host
sdkVersion Sdk version
timeZone Time zone
deviceFaceDown Is the device face down
locationLong Location longitude conditioned by location permission
locationLat Location latitude conditioned by location permission
locationState Location state conditioned by location permission
wifiSsid Wifi SSID
wifiSsidPermissionStatus Wifi SSID permission status
host The host that failed minimum requirement ECC signature validation
DeveventDetailedErrorMessage Error message
extendedMessageText Extended message
certificateCN Certificate common name
certificateSHA1 Certificate SHA1

With Threat-Events™ enabled (turned ON), Android developers can get detailed attack intelligence and granular defense control in Android applications and create amazing user experiences for all mobile end users when Strong ECC Signature is detected.


The following is a code sample for native Android apps, which uses all values in the specification above for Enforce Strong ECC Signature :


Important! Replace all placeholder instances of <Context Key> with the specific name of your threat event context key across all language examples. This is crucial to ensure your code functions correctly with the intended event data. For example, The <Context Key> could be the message, externalID, OS Version, reason code, etc.



Using Appdome, there are no development or coding prerequisites to build secured Android Apps by using Enforce Strong ECC Signature . There is no SDK and no library to code or implement in the app and no gateway to deploy in your network. All protections are built into each app and the resulting app is self-defending and self-protecting.

Releasing and Publishing Mobile Apps with Enforce Strong ECC Signature

After successfully securing your app by using Appdome, there are several available options to complete your project, depending on your app lifecycle or workflow. These include:

Related Articles:

How to Enforce SHA-256 Digest in Android & iOS Apps

How to use Secure Certificate Pinning in Android & iOS Apps

How to Prevent MiTM Attacks in Android Apps

 

How Do I Learn More?

If you have any questions, please send them our way at support.appdome.com or via the chat window on the Appdome platform.

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