The Counter with CBC Mac mode, an authenticated encryption mode of operation for a block cipher based on the CTR mode and the CBC-MAC algorithm. .

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Attacks from releasing decrypted CCM payload before verifying tag

CCM specifies (Section 1.7) that no plaintext data should be released before the MAC is verified. Why is this recommendation given and what attacks are possible against CCM if data is treated like a ...
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Unique GCM/CCM initial counters without recipient side message counters

I am implementing the encryption layer for a communication protocol. The bulk encryption method used is either AES-CCM or AES-GCM. Due to implementation details, encryption of packets is usually, but ...
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Separate TLS Client Write and Server Write Keys in AES-CCM Mode

I am designing a system that uses TLS-like handshaking on a resource-constrained embedded system. I have settled on AES-CCM mode for symmetric session encryption and authentication, allowing ...
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How does AES-CCM work in BitLocker?

I'm studying this white-paper: http://jessekornblum.com/publications/di09.pdf The author says that using AES-CCM with the external key (highlighted in green at page 9, figure 4) and with the nonce at ...
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Difference between AES-CCM and AES-CCM*

I'm trying to understand the different between AES-CCM and AES-CCM* (as defined in IEEE Std 802.15.4™‐2011, Annex B). I see that there are more restrictions on L and M and also M=0 is allowed: L = 2 ...