# Search for CyberSource P12 Certificates


CyberSource requires a security key be sent with each transaction for authentication purposes. The keys are provided by CyberSource in the form of a P12 certificate. Each P12 has an expiration date which you can view in the CyberSource Business Center.

**P12 certificates must be replaced before they expire to prevent authentication failures and service disruption.**

1. Go to the appropriate Business Center and log in with your Username and Password.
    - [CyberSource Test Business Center](https://ebctest.cybersource.com/ebctest/login/Login.do)
    - [CyberSource Live Business Center](https://ebc.cybersource.com/ebc/login/Login.do)

2. In the left navigation menu, select "Payment Configuration" and then "Key Management".

    ![CyberSource Business Center showing Payment Configuration and Key Management navigation](https://isupport.katointegrations.com/cti/search-cs-p12-certificates/step1.png "Key Management navigation")

3. In the Search Filters, change the "Key Type" and "Expires At" fields to match the below image, and then click "Search".

    ![CyberSource Key Management page with Search Filters](https://isupport.katointegrations.com/cti/search-cs-p12-certificates/step2.png "Search Filters")

4. The search results will show a list of all P12 certificates along with their expiration date and status.

    ![CyberSource Key Management search results](https://isupport.katointegrations.com/cti/search-cs-p12-certificates/step3.png "Search Results")