Obtaining an AS2 Certificate: A Comprehensive Guide | Aayu Technologies
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Obtaining an AS2 Certificate: A Comprehensive Guide

Learn how to obtain an AS2 Certificate for secure data transmission with our comprehensive guide.

28 Mar 2024 by Rusiri Samarakoon

In the realm of secure data exchange between businesses, AS2 (Applicability Statement 2) certificates play a pivotal role. These digital certificates are essential for authenticating and encrypting data transmitted over AS2 connections, ensuring the confidentiality and integrity of sensitive information. In this blog post, we’ll delve into the process of obtaining an AS2 certificate, guiding you through the steps to acquire this crucial component for secure B2B communication.

Understanding AS2 Certificates

AS2 certificates are digital certificates based on the public-key infrastructure (PKI) that enable secure communication between trading partners. These certificates consist of a public key, used for encryption and verification, and a private key, used for decryption and signing. AS2 certificates are issued by trusted Certificate Authorities (CAs) and are unique to each organization. However, AS2 certificates do not require a third-party Certification Authority (CA) to sign certificates. Users can choose to get the certificates signed if the remote partners require it. Using self-signed certificates incurs no additional costs, such as the charges by third-party CAs, which charge fees for certificate signing. Hence, you have the option to generate self-signed certificates on your own and share them securely with your partners as well.

In this guide, we will educate you on obtaining an AS2 certificate via a trusted Certificate Authority (CA).

Steps to Obtain an AS2 Certificate

Step 1: Identify Your Organization’s Requirements

Before obtaining an AS2 certificate, assess your organization’s specific requirements for secure data exchange. Determine the number of certificates needed, the strength or size of the encryption key, and any additional features such as extended validation (EV) certificates for enhanced trust.

Step 2: Choose a Trusted Certificate Authority (CA)

Select a reputable Certificate Authority (CA) that offers AS2 certificates and meets your organization’s needs. Research different CAs, considering factors such as pricing, certificate features, support services, and reliability.

Step 3: Generate a Certificate Signing Request (CSR)

Once you’ve chosen a CA, generate a Certificate Signing Request (CSR) using your AS2-compatible software or server. The CSR contains information about your organization, including the domain name, organization name, and location, which will be used to create the AS2 certificate.

Step 4: Submit the CSR to the Certificate Authority

Submit the generated CSR to the chosen Certificate Authority for certificate issuance. This typically involves uploading the CSR through the CA’s online portal or sending it via email. Provide any additional information required by the CA, such as proof of domain ownership or legal documentation.

Step 5: Complete Verification Process

The Certificate Authority will verify the information provided in the CSR before issuing the AS2 certificate. This verification process may include confirming domain ownership, validating organization details, and ensuring compliance with industry regulations.

Step 6: Receive and Install the AS2 Certificate

Once the verification process is complete, the Certificate Authority will issue the AS2 certificate. You will receive the certificate file along with instructions for installation. Install the certificate on your AS2-compatible software or server following the CA’s guidelines.

Step 7: Test AS2 Connection

After installing the AS2 certificate, conduct thorough testing to ensure proper functionality and compatibility with your trading partners’ systems. Send test messages and verify successful receipt and processing to confirm the integrity of the AS2 connection.


Obtaining an AS2 certificate is a crucial step for organizations looking to secure their B2B communication channels. By following these steps businesses can acquire AS2 certificates that meet their security requirements and facilitate seamless data exchange with trading partners. As digital commerce continues to evolve, AS2 certificates remain essential for safeguarding sensitive information and maintaining trust in B2B transactions.