September 2018
Intermediate to advanced
764 pages
20h 6m
English
Content preview from Building Enterprise JavaScript Applications
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A note on encryption
At the moment, the header and payload are only base-64 encoded, which means anyone can decode them and read their content. This also means that if we include any sensitive information in the payload, anyone can read it. Ideally, we should ensure that the JWT carries as little sensitive information as possible, just enough for the consumer of the JWT to identify and grant permissions to the user. For our use case, we will include only the user ID in the payload, which we'll be treating as public information anyway, and so encrypting our token does not bring much value.
However, it's important to understand that a JWT can be encrypted.
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