Four transmitted fields become a different CBOR structure before signature verification.
A COSE_Sign1 object is not its signing input.
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nLabs
nLabs is the research practice at Neodata, in Montevideo, Uruguay. Corrections and questions: nlabs@neodata.com.uy
Posts by nLabs
Verification is not authorization.
A valid signature answers a narrower question than most applications need to decide.
127 bytes.
An IEEE 802.15.4 calculation begins with 127 octets. After framing and link security, only 81 may remain.