Recent Revisions to This Document {#restgs-doc-revisions}
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26.07.01
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Updated the deadline in which HTTP signature messaging will no longer be supported. See [Introduction to REST](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-intro.md "").  
Updated the digest body claim field value format information. For JWTs using P12 certificates, see [Step 3C: Set the JWS Body Claims](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-message-intro/restgs-jwt-const-intro/restgs-jwt-message-set-jws-body.md "") and for JWTs using shared secret key pairs, see [Step 3C: Set the JWS Body Claims](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-shared-secret-intro/restgs-jwt-con-shared-secret-intro/restgs-jwt-shared-secret-set-jws-body.md "").

26.06.01
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Added the request-host field to the required JWS Body Claims table. If you are using a P12 certificate, see Step 3C in [Construct Messages Using JSON Web Tokens](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-message-intro/restgs-jwt-const-intro.md ""). If you are using a shared secret key pair, see Step 3C in [Construct Messages Using JSON Web Tokens](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-shared-secret-intro/restgs-jwt-con-shared-secret-intro.md "").

26.05.01
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This revision contains only editorial changes and no technical updates.

26.04.01
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How to Set Up Your `Cybersource` Account
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Updated the set up graphic to support the new SDK integration method. See [How to Set Up REST](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-setup-workflow.md "").

Construct Messages Using JSON Web Tokens
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Updated the body claim field descriptions for the exp, iss, and request-resource-path fields.
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Updated the JWS body claim field descriptions to include lowercase format requirements.

    For both updates, see Step 3C in [Construct Messages Using JSON Web Tokens](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-message-intro/restgs-jwt-const-intro.md "") using a P12 certificate and the [Construct Messages Using JSON Web Tokens](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-shared-secret-intro/restgs-jwt-con-shared-secret-intro.md "") using a shared secret key pair.

Enable Message-Level Encryption
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Updated the prerequisites list for enabling Messagel-Level Encryption (MLE). See the Prerequisites for MLE section in [Enable Message-Level Encryption](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-message-intro/restgs-mle-intro.md "") using P12 certificates and [Enable Message-Level Encryption](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-shared-secret-intro/restgs-mle-shared-secret-intro.md "") using shared secret key pairs.
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Corrected the spelling for all mentions of the v-c-response-mle-kid body claim field throughout guide.

SDK Integration
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Added new SDK integration section. See [Set Up a JSON Web Token Message Using the REST SDK](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-sdk-intro.md "").

26.02.01
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Added new section that explains how to migrate from HTTP signature messaging to JWT messaging using a shared secret key pair. See [Set Up a JSON Web Token Message Using Shared Secret Key Pairs](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-jwt-shared-secret-intro.md "").  
Added a warning note with the deprecation deadline for HTTP signature messaging. See [Set Up an HTTP Signature Message](/content/cybsdeveloper2021/amer/en/docs/cybs/en-us/platform/developer/all/rest/rest-getting-started/restgs-http-message-intro.md "").

26.01.01
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This revision contains only editorial changes and no technical updates.