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Data encryption, which prevents data visibility in the event of its unauthorized access or theft, is commonly used to protect data in motion and increasingly promoted for protecting data at rest. [9] The encryption of data at rest should only include strong encryption methods such as AES or RSA. Encrypted data should remain encrypted when ...
Transparent data encryption (often abbreviated as TDE) is used to encrypt an entire database, [2] which therefore involves encrypting "data at rest". [4] Data at rest can generally be defined as "inactive" data that is not currently being edited or pushed across a network. [5] As an example, a text file stored on a computer is "at rest" until ...
For example, the Computer Security Institute reported that in 2007, 71% of companies surveyed used encryption for some of their data in transit, and 53% used encryption for some of their data in storage. [21] Encryption can be used to protect data "at rest", such as information stored on computers and storage devices (e.g. USB flash drives). In ...
It supersedes the Data Encryption Standard (DES), [9] which was published in 1977. The algorithm described by AES is a symmetric-key algorithm, meaning the same key is used for both encrypting and decrypting the data. In the United States, AES was announced by the NIST as U.S. FIPS PUB 197 (FIPS 197) on November 26, 2001. [6]
Confidential computing can be used in conjunction with storage and network encryption, which protect data at rest and data in transit respectively. [ 1 ] [ 2 ] It is designed to address software, protocol, cryptographic, and basic physical and supply-chain attacks, although some critics have demonstrated architectural and side-channel attacks ...
An encryption algorithm used for data storage has to support independent encryption and decryption of portions of data. So-called narrow-block algorithms operate on relatively small portions of data, while the wide-block algorithms encrypt or decrypt a whole sector. Narrow-block algorithms have the advantage of more efficient hardware ...
Disk encryption is a special case of data at rest protection when the storage medium is a sector-addressable device (e.g., a hard disk). This article presents cryptographic aspects of the problem. This article presents cryptographic aspects of the problem.
The rest of the algorithm is identical. This greatly simplifies implementation, particularly in hardware, as there is no need for separate encryption and decryption algorithms. The ⊕ symbol denotes the exclusive-OR (XOR) operation. The F-function scrambles half a block together with some of the key. The output from the F-function is then ...