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CCM Vector Most Valuable Player Award
CCM may refer to: Computing * CCM mode, an encryption algorithm * Client Configuration Manager, a component of Microsoft System Center Configuration Manager * Combined Cipher Machine, a WWII-era cipher system * Community Climate Model, predecessor of the Community Climate System Model#Development, Community Climate System Model * Constrained conditional model, a machine-learning framework * Convergent cross mapping, a test for cause-and-effect relationships * CORBA Component Model * Customer communications management, a type of software Government * Center for Countermeasures, a US White Sands Proving Grounds operation * Chama Cha Mapinduzi, the ruling political party in Tanzania * Convention on Cluster Munitions, a 2010 international treaty prohibiting cluster bombs Job titles * Case_management_(US_healthcare_system)#Certification, Certified Case Manager, an accreditation for health care providers * Certified Consulting Meteorologist, an accreditation of the American Mete ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CCM Mode
CCM mode (counter with cipher block chaining message authentication code; counter with CBC-MAC) is a mode of operation for cryptographic block ciphers. It is an authenticated encryption algorithm designed to provide both authentication and confidentiality. CCM mode is only defined for block ciphers with a block length of 128 bits. The nonce of CCM must be carefully chosen to never be used more than once for a given key. This is because CCM is a derivation of counter (CTR) mode and the latter is effectively a stream cipher. Encryption and authentication As the name suggests, CCM mode combines counter (CTR) mode for confidentiality with cipher block chaining message authentication code (CBC-MAC) for authentication. These two primitives are applied in an "authenticate-then-encrypt" manner: CBC-MAC is first computed on the message to obtain a message authentication code (MAC), then the message and the MAC are encrypted using counter mode. The main insight is that the same ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |