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update: line breaks of Table 3: Content Key Distribution Comparison
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kentakayama committed Jan 8, 2025
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10 changes: 5 additions & 5 deletions draft-ietf-suit-firmware-encryption.md
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Expand Up @@ -1427,11 +1427,11 @@ distribution, utilizing two primary methods: AES Key Wrap (AES-KW) and
Ephemeral-Static Diffie-Hellman (ES-DH). The key properties associated
with their deployment are summarized in {{cek-distribution}}.

| Number of<br/>Long-Term<br/>Keys | Number of<br/>Content<br/>Encryption<br/>Keys (CEKs) | Use Case | Recommended? |
|----------------------------------|-----------------------------------------------------------------------|----------------------------------------------|----------------------|
| Same key<br/>for all<br/>devices | Single<br/>CEK per<br/>payload<br/>shared<br/>with all<br/>devies | Legacy<br/>Usage | No, bad<br/>practice |
| One key<br/>per device | Single<br/>CEK per<br/>payload<br/>shared<br/>with all<br/>devies | Efficient<br/>Payload<br/>Distribution | Yes |
| One Key<br/>per device | One CEK<br/>per payload<br/>encryption<br/>transaction<br/>per device | Point-to-<br/>Point Payload<br/>Distribution | Yes |
| Number of<br/>Long-Term<br/>Keys | Number of Content<br/>Encryption Keys (CEKs) | Use Case | Recommended? |
|----------------------------------|---------------------------------------------------------------|----------------------------------------------|----------------------|
| Same key<br/>for all<br/>devices | Single CEK per<br/>payload shared<br/>with all devies | Legacy Usage | No, bad<br/>practice |
| One key<br/>per device | Single CEK per<br/>payload shared<br/>with all devies | Efficient<br/>Payload<br/>Distribution | Yes |
| One Key<br/>per device | One CEK per payload<br/>encryption transaction<br/>per device | Point-to-<br/>Point Payload<br/>Distribution | Yes |
{: #cek-distribution title="Content Key Distribution: Comparison"}

The use of firmware encryption in battery-powered IoT devices introduces the
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