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json-ld signatures with Ed25519VerificationKey2018

From: Nikos Fotiou <fotiou@aueb.gr>
Date: Wed, 3 Jun 2020 05:23:03 +0300
To: <public-credentials@w3.org>
Message-ID: <011b01d6394d$e9093c90$bb1bb5b0$@aueb.gr>
Hi all,
I am experimenting with json-ld signatures, using digital bazaar's library 
https://github.com/digitalbazaar/jsonld-signatures

I notice when this algorithm is used Ed25519VerificationKey2018 the library
crates a jwt with the following header:
header = {
    "alg": "EdDSA",
    "b64": False,
    "crit": ["b64"]
}
I am struggling to understand what is this header and why is there. Anybody?

Thanks,
Nikos

Received on Wednesday, 3 June 2020 02:23:21 UTC

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