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Message Level Encryption

Message Level Encryption (MLE) uses certificates to ensure each message is securely encrypted and tied to the sender's verified identity, without needing to share secret keys in advance.
MLE provides stronger authentication, easier key management, and better protection against fraud or tampering.
A shared secret uses the same key for both sending and receiving messages, meaning both parties must securely exchange and protect that key in advance. While MLE can be simpler, it offers less identity verification and can be more vulnerable if the key is compromised.
IMPORTANT
Message Level Encryption requires that a .p12 certificate to be created.
  1. Extract and convert the p12 certificate to the .
    pem
     format using this command:
    openssl pkcs12 -in <key filename>.p12 -cacerts -nokeys -out <key filename>.crt
    IMPORTANT
    Be sure to note the serial number of the
    Cybersource
    _SJC_US certificate.
  2. Import the certificate, by going to
    Administration > Operations > Private Keys and Certificates
     and importing the extracted
    .crt
    . Make a note of the alias.
  3. Enable Message Level Encryption, by going to
    Merchant Tools > Site Preferences > Custom Preferences > Cybersource_MLE
    .
  4. Enable the
    Enable Message-Level Encryption
     option.
  5. In the
    Alias of the Certificate
    field, enter the Alias from when the certificate was imported.
  6. In the
    Certificate Serial Number
    field, enter the serial number from the
    Cybersource
    _SJC_US certificate.
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