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  2. Bitdefender - Wikipedia

    en.wikipedia.org/wiki/Bitdefender

    Bitdefender and NinjaOne announced a partnership in May 2024 to integrate their security software into a single product suite. [25] The company also releases free decryption tools for victims of ransomware attacks, including the BitLocker-abusing ShrinkLocker ransomware in 2024. [26] Bitdefender also conducts research through Bitdefender Labs ...

  3. GOST (block cipher) - Wikipedia

    en.wikipedia.org/wiki/GOST_(block_cipher)

    GOST has a 64-bit block size and a key length of 256 bits. Its S-boxes can be secret, and they contain about 354 (log 2 (16! 8)) bits of secret information, so the effective key size can be increased to 610 bits; however, a chosen-key attack can recover the contents of the S-boxes in approximately 2 32 encryptions.

  4. Block size (cryptography) - Wikipedia

    en.wikipedia.org/wiki/Block_size_(cryptography)

    The length of this bit string is the block size. [1] Both the input ( plaintext ) and output ( ciphertext ) are the same length; the output cannot be shorter than the input – this follows logically from the pigeonhole principle and the fact that the cipher must be reversible – and it is undesirable for the output to be longer than the input.

  5. Blowfish (cipher) - Wikipedia

    en.wikipedia.org/wiki/Blowfish_(cipher)

    Blowfish has a 64-bit block size and a variable key length from 32 bits up to 448 bits. [5] It is a 16-round Feistel cipher and uses large key-dependent S-boxes.In structure it resembles CAST-128, which uses fixed S-boxes.

  6. Block cipher - Wikipedia

    en.wikipedia.org/wiki/Block_cipher

    Blowfish is a block cipher, designed in 1993 by Bruce Schneier and included in a large number of cipher suites and encryption products. Blowfish has a 64-bit block size and a variable key length from 1 bit up to 448 bits. [45] It is a 16-round Feistel cipher and uses large key-dependent S-boxes.

  7. Simon (cipher) - Wikipedia

    en.wikipedia.org/wiki/Simon_(cipher)

    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 round.

  8. Ciphertext stealing - Wikipedia

    en.wikipedia.org/wiki/Ciphertext_stealing

    Decrypt the second-to-last ciphertext block using ECB mode. C n = C n || Tail (D n, B−M). Pad the ciphertext to the nearest multiple of the block size using the last B−M bits of block cipher decryption of the second-to-last ciphertext block. Swap the last two ciphertext blocks. Decrypt the (modified) ciphertext using the standard CBC mode.

  9. Block cipher mode of operation - Wikipedia

    en.wikipedia.org/wiki/Block_cipher_mode_of_operation

    In the specification of the CFB mode below, each plaintext segment (Pj) and ciphertext segment (Cj) consists of s bits. The value of s is sometimes incorporated into the name of the mode, e.g., the 1-bit CFB mode, the 8-bit CFB mode, the 64-bit CFB mode, or the 128-bit CFB mode. These modes will truncate the output of the underlying block cipher.

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