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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 ...
File level encryption encrypts only the file contents. This leaves important information such as file name, size and timestamps unencrypted. Parts of the content of the file can be reconstructed from other locations, such as temporary files, swap file and deleted, unencrypted copies.
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.
Eraser is an open-source [1] secure file erasure tool available for the Windows operating system. [2] [3] [4] [5] It supports both file and volume wiping.[6] [2 ...
crypt (Unix) In Unix computing, crypt or enigma is a utility program used for encryption. Due to the ease of breaking it, it is considered to be obsolete. The program is usually used as a filter, and it has traditionally been implemented using a "rotor machine" algorithm based on the Enigma machine. It is considered to be cryptographically far ...
A disk cipher device of the Jefferson type from the 2nd quarter of the 19th century in the National Cryptologic Museum. The Jefferson disk, also called the Bazeries cylinder or wheel cypher, [1] was a cipher system commonly attributed to Thomas Jefferson that uses a set of wheels or disks, each with letters of the alphabet arranged around their edge in an order, which is different for each ...
Classical cipher. In cryptography, a classical cipher is a type of cipher that was used historically but for the most part, has fallen into disuse. In contrast to modern cryptographic algorithms, most classical ciphers can be practically computed and solved by hand. However, they are also usually very simple to break with modern technology.