Samsung IAP ISN Header
The Samsung In-App Purchase (IAP) Instant Server Notification (ISN) is a JSON Web Token (JWT) that uses a JOSE (Javascript Object Signing and Encryption) header. The header lists properties related to cryptographic operations applied to a claim set.
The header is encoded in base64 format. When it is decoded, it is in JSON format.
Example encoded header
eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9
Example decoded header
{
"alg" : "RS256",
"typ" : "JWT"
}
JSON Properties
Name | Value | Description |
---|---|---|
alg | string | Algorithm used to generate the JWT signature. By default, ISN supports RS256 (SHA256withRSA). |
typ | string | Token type. This is always JWT. |