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A.7. Example MACed CWT with a Floating-Point Value

A.7. Example MACed CWT with a Floating-Point Value​

This section shows a MACed CWT with a single recipient and a simple CWT Claims Set. The CWT Claims Set with a floating-point 'iat' value.

The MAC is generated using the 256-bit symmetric key from Appendix A.2.2 with a 64-bit truncation. Line breaks are for display purposes only.

d18443a10104a1044c53796d6d65747269633235364ba106fb41d584367c2000
0048b8816f34c0542892

Figure 18: MACed CWT with a Floating-Point Value as Hex String

17(
  [
    / protected / << {
      / alg / 1: 4 / HMAC-256-64 /
    } >>,
    / unprotected / {
      / kid / 4: h'53796d6d6574726963323536' / 'Symmetric256' /,
    },
    / payload / << {
      / iat / 6: 1443944944.5
    } >>,
    / tag / h'b8816f34c0542892'
  ]
)

Figure 19: MACed CWT with a Floating-Point Value in CBOR Diagnostic Notation

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