Hi COSE WG,

Pardon my COSE illiteracy, but I could not find the answer.

COSE can carry multiple signatures of the content which are validated 
independently. But could I take COSE legitimate content signed with SigAlgo1 
and SigAlgo2, and remove the Algo2 signature structure, so that the verifier 
will only validate with Algo1?

CMS prevents this by a new MultipleSignatures signed attribute defined in 
https://www.rfc-editor.org/rfc/rfc5752 which signifies that there are more 
signatures for the content and thus the other signatures cannot be stripped.

I could not find if such functionality is available in COSE.

Thank you,
Panos



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