You are confusing block size and key size
All instances of AES are 128-bit block size, regardless of key size.
-derek
Sent using my mobile device. Please excuse any typos.
On November 12, 2017 8:01:49 AM Brian Rasmussen <[email protected]> wrote:
Hi
I have a specific question regarding the COSE defined AES CCM (chapter 10.2
of RFC 8152) mode. The definition of CCM mode is referenced in RFC3610, but
RFC3610 only defines 128-bit block ciphers. In Table 10 in chapter 10.2 of
RFC8152 there are specified AES CCM algorithms, that uses 256-bit block
ciphers like the AES-CCM-16-64-256 algorithm. Where is the CCM mode for
256-bit block ciphers defined?
Any advice would be helpful. Thanks in advance for your answer.
Venlig hilsen / Best regards
[Kamstrup A/S]<http://kamstrup.com/>
Brian Rasmussen
Teamlead Embedded SW
Technology
Kamstrup A/S
Industrivej 28
DK-8660 Skanderborg
T: +45 89 93 10 00
D: +45 89 93 16 17
[email protected]<mailto:[email protected]>
kamstrup.com
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