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A scytale. In cryptography, a scytale (/ ˈ s k ɪ t əl iː /; also transliterated skytale, Ancient Greek: σκυτάλη skutálē "baton, cylinder", also σκύταλον skútalon) is a tool used to perform a transposition cipher, consisting of a cylinder with a strip of parchment wound around it on which is written a message.
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Three rounds of the CAST-128 block cipher. In cryptography, CAST-128 (alternatively CAST5) is a symmetric-key block cipher used in a number of products, notably as the default cipher in some versions of GPG and PGP.
Even though the ransomware claimed TeslaCrypt used asymmetric encryption, researchers from Cisco's Talos Group found that symmetric encryption was used and developed a decryption tool for it. [9] This "deficiency" was changed in version 2.0, rendering it impossible to decrypt files affected by TeslaCrypt-2.0. [10]
Substitution Ciphers and the Aristocrat Cipher are still used in many ways today including storage encryption, password encryption, cyber security, etc. The most common of these is data encryption , where using the Encryption Algorithms you convert plaintext to ciphertext, allowing your data to be stored without easy exfiltration.
MagicGate encryption was introduced with Sony's first digital audio players, with the related OpenMG technology being its software counterpart. [4] Since then, the encryption has been rolled out to other Sony devices – it is used in the memory cards of the PlayStation 2 and, as of 2004 [update] , has been introduced into all of Sony's Memory ...
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The LFSR is created by a 5-bit field. The constant bit operates on a key block once per round on the lowest bit in order to add non-key-dependent entropy to the key schedule. The LFSR has different logic for each sequence; however, the initial condition is the same for encryption. The initial condition of the LFSR for decryption varies on the ...