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For example, master keyed pin tumbler locks often have two shear points at each pin position, one for the change key and one for the master key. A far more secure (and more expensive) system has two cylinders in each lock, one for the change key and one for the master key. Master keyed lock systems generally reduce overall security. [2]
Key control refers to various methods for making sure that certain keys are only used by authorized people. This is especially important for master key systems with many users. [ 1 ] A system of key control includes strategies for keeping track of which keys are carried by which people, as well as strategies to prevent people from giving away ...
master key - key from which all other keys (or a large group of keys) can be derived. Analogous to a physical key that can open all the doors in a building. master encryption key (MEK) - Used to encrypt the DEK/TEK key. master key encryption key (MKEK) - Used to encrypt multiple KEK keys. For example, an HSM can generate several KEK and wrap ...
Key wrapping keys are also known as key encrypting keys. Symmetric and asymmetric random number generation keys These are keys used to generate random numbers. Symmetric master key A symmetric master key is used to derive other symmetric keys (e.g., data encryption keys, key wrapping keys, or authentication keys) using symmetric cryptographic ...
Example of a Key Derivation Function chain as used in the Signal Protocol.The output of one KDF function is the input to the next KDF function in the chain. In cryptography, a key derivation function (KDF) is a cryptographic algorithm that derives one or more secret keys from a secret value such as a master key, a password, or a passphrase using a pseudorandom function (which typically uses a ...
A key management system (KMS), also known as a cryptographic key management system (CKMS) or enterprise key management system (EKMS), is an integrated approach for generating, distributing and managing cryptographic keys for devices and applications. They may cover all aspects of security - from the secure generation of keys over the secure ...
The bitting code is used in conjunction with a key's Depth and Spacing Number to completely determine all relevant information regarding the key's geometry. [1] Each number in the bitting code corresponds to a cut on the key blade. For example, a bitting code of 11111 with Depth and Spacing Number 46 specifies a Kwikset key with five shallow cuts.
Newer NSA systems allow "over the air rekeying" (OTAR), but a master key often must still be loaded using a fill device. NSA uses two serial protocols for key fill, DS-101 and DS-102 . Both employ the same U-229 6-pin connector type used for U.S. military audio handsets , with the DS-101 being the newer of the two serial fill protocols.