name: CCM
full_form: Certificate Configuration Message
context: a) Memory requirement: CCM has the smallest ROM usage since it mostly relies on the block cipher, and no other special function is used. The code for GCM is the largest due to the multiplier over a binary Galois field. The RAM usage follows the same pattern. GCM has the largest RAM usage as it applies the extra pre-computation table for speed acceleration. b) Computation cost: CCM possesses the highest computation overhead among three schemes as it needs two cipher invocations for each plaintext block, while the other two schemes require merely one cipher call for each plaintext block plus the special function with low computation complexity. c) Speed: If GCM applies the 64 Kbytes pre-computation table for accelerating the multiplication, its speed is faster than OCB. However this kind of implementation cannot be used in the IOT environment where RAM is usually not larger than 10 Kbytes [8]. So we apply the GCM with 256 Bytes pre-computation table for IOT environments, which is denoted
description: Certificate Configuration Message (CCM) is a specific data structure used in cryptographic operations within telecommunications. It's primarily involved in securing communications by encrypting and decrypting data.
explanation: The text describes CCM in the context of performance comparison with other cryptographic schemes like GCM and OCB, highlighting its role in encryption and decryption processes.
section_title: D.2	Performance comparison
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