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Crypto-shredding. Crypto-shredding is the practice of 'deleting' data by deliberately deleting or overwriting the encryption keys. [ 1] This requires that the data have been encrypted. Data may be considered to exist in three states: data at rest, data in transit and data in use. General data security principles, such as in the CIA triad of ...
Ransomware is a type of cryptovirological malware that permanently blocks access to the victim's personal data unless a "ransom" is paid. While some simple ransomware may lock the system without damaging any files, more advanced malware uses a technique called cryptoviral extortion. It encrypts the victim's files, making them inaccessible, and ...
Data erasure. Data erasure (sometimes referred to as data clearing, data wiping, or data destruction) is a software-based method of data sanitization that aims to completely destroy all electronic data residing on a hard disk drive or other digital media by overwriting data onto all sectors of the device in an irreversible process.
Diffie–Hellman (DH) key exchange [ nb 1] is a mathematical method of securely exchanging cryptographic keys over a public channel and was one of the first public-key protocols as conceived by Ralph Merkle and named after Whitfield Diffie and Martin Hellman. [ 1][ 2] DH is one of the earliest practical examples of public key exchange ...
Data remanence is the residual representation of digital data that remains even after attempts have been made to remove or erase the data. This residue may result from data being left intact by a nominal file deletion operation, by reformatting of storage media that does not remove data previously written to the media, or through physical properties of the storage media that allow previously ...
data encryption key (DEK) used to encrypt the underlying data. derived key - keys computed by applying a predetermined hash algorithm or key derivation function to a password or, better, a passphrase. DRM key - A key used in digital rights management to protect media. electronic key - (NSA) key that is distributed in electronic (as opposed to ...
File deletion is the removal of a file from a computer's file system . All operating systems include commands for deleting files ( rm on Unix and Linux, [1] era in CP/M and DR-DOS, del / erase in MS-DOS / PC DOS, DR-DOS, Microsoft Windows etc.). File managers also provide a convenient way of deleting files. Files may be deleted one-by-one, or a ...
Through the use of modern encryption algorithms and various encryption techniques these programs make the data virtually impossible to read without the designated key. File level encryption encrypts only the file contents. This leaves important information such as file name, size and timestamps unencrypted.