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  1. For example, a common block cipher, AES, encrypts 128 bit blocks with a key of predetermined length: 128, 192, or 256 bits.[1]
  2. Block ciphers are pseudorandom permutation (PRP) families that operate on the fixed size block of bits.[1]
  3. A block cipher maps each possible input block of plaintext to an output block of ciphertext.[2]
  4. Just because the defender is using a secure block cipher does not mean it is automatically operated in a secure manner.[2]
  5. tags lack the memory, computing power, and/or electrical power reserves for a block cipher.[2]
  6. In this section, we will discuss the definition of block cipher.[3]
  7. Block cipher is an encryption method which divides the plain text into blocks of fixed size.[3]
  8. On an all the block cipher operates on a block of bits at a time instead of one bit a time.[3]
  9. Operating bit by bit is a very time-consuming process and as block cipher is a computer-based cryptographic algorithm it needs to be fast.[3]
  10. Encryption algorithms are divided into two categories based on input type, as block cipher and stream cipher.[4]
  11. Block cipher is an encryption algorithm which takes fixed size of input say b bits and produces a ciphertext of b bits again.[4]
  12. The Output Feedback mode of block cipher holds great resistance towards bit transmission errors.[4]
  13. A block cipher takes a block of plaintext bits and generates a block of ciphertext bits, generally of same size.[5]
  14. Block ciphers process blocks of fixed sizes (say 64 bits).[5]
  15. This scheme of block cipher uses block size of 128 bits and a key of variable length.[5]
  16. Block ciphers may be capable of operating on more than one block size, but during transformation the block size is always fixed.[6]
  17. A block cipher works on units of a fixed size (known as a block size), but messages come in a variety of lengths.[6]
  18. GCM is defined for block ciphers with a block size of 128 bits.[6]
  19. The cipher feedback (CFB) mode, in its simplest variation is using the entire output of the block cipher.[6]
  20. In cryptography, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called blocks.[7]
  21. Even a secure block cipher is suitable only for the encryption of a single block of data at a time, using a fixed key.[7]
  22. A block cipher by itself allows encryption only of a single data block of the cipher's block length.[7]
  23. On the other hand, CBC mode can be proven to be secure under the assumption that the underlying block cipher is likewise secure.[7]
  24. Block ciphers have the advantage of high diffusion and strong tamper resistance without detection.[8]
  25. Block ciphers also breed errors since a mistake in just one symbol could alter the whole block.[8]
  26. Block ciphers are built in the Feistel cipher structure.[9]
  27. Block cipher has a specific number of rounds and keys for generating ciphertext.[9]
  28. Two (2) other block cipher algorithms were previously approved: DES and Skipjack; however, their approval has been withdrawn.[10]
  29. Block Cipher, which was approved in November 2017.[10]
  30. There are two types of cipher schemes in the chaos-based cryptosystems: stream ciphers and block ciphers.[11]
  31. The chaotic block ciphers adopt chaotic maps to generate parameters used in encryption and decryption procedures.[11]
  32. We point out the drawbacks of the Wang-Yu block cipher based on dynamic sequences generated by multiple chaotic systems.[11]
  33. In order to obtain a secure block cipher from chaotic systems, we make efforts to improve the Wang-Yu block cipher.[11]
  34. Since AES is so well trusted, a new cipher must provide a lot of benefits to be a viable block cipher alternative to AES.[12]
  35. But the IoT crypto research focus to a large extent instead seems to be on lightweight block ciphers.[12]
  36. The venerable block cipher XTEA could be considered a lightweight cipher.[12]
  37. PRINCE (Wikipedia), presented in 2012, is a low-latency, lightweight block cipher.[12]
  38. A block cipher is a type of cipher that encrypts text by running blocks of the text through an algorithm that jumbles it up.[13]
  39. For instance, a block cipher would work by encrypting the first paragraph of this lesson before moving on to the next paragraph.[13]
  40. A block cipher would repeat this process until the entire lesson was encrypted.[13]
  41. Twofish is another type of block cipher that is becoming more popular today.[13]
  42. In detail, the first invoke of block cipher produces a subkeyfrom the secret keysuch that, and.[14]
  43. Thus, our design only requires one invocation of a block cipher for encryption and decryption when the subkeyis precomputed and stored.[14]
  44. is meaningful even if an adversary can process more thandata blocks, whereis the size of the block of a block cipher.[14]
  45. N block cipher is utilized in various applications of different block sizes, such as 128 − b i t and 64 − b i t .[14]
  46. The state of a block cipher is reset before processing each block.[15]
  47. The DES and AES algorithms are examples of block ciphers (see DES and AES ).[15]
  48. A block cipher takes a fixed-length number of bits, referred to as a block, and encrypts them all at once.[16]
  49. Block ciphers can process large amounts of data.[16]
  50. Large amounts of data processed through a block cipher may begin to show patterns in the cipher text.[16]
  51. Advanced Encryption Standard (AES) is an iterative symmetric key block cipher that was developed as a replacement to DES in 2001.[16]
  52. Any block cipher can be operated in one of several modes, defined in FIPS PUB 81.[17]
  53. CBC is the most commonly used mode of operation for a block cipher.[17]
  54. CBC can be used to convert a block cipher into a hash algorithm.[17]
  55. Output Feedback Mode (OFB) converts a block cipher into pseudo-random number generator.[17]
  56. There are certain generalities that have to be followed in order to create a block cipher.[18]
  57. The code you have shown is technically not a block cipher.[18]
  58. The other method we have for a block cipher is CBC (Cipher Block Chaining) and which adds a 64-bit salt value to the cipher process.[19]
  59. Over stream ciphers are often faster than block ciphers, and they do not need padding added.[19]
  60. In cryptography block ciphers (like AES) are designed to encrypt a block of data of fixed size (e.g. 128 bits).[20]
  61. Ciphers are usually grouped into two categories: stream ciphers and block ciphers.[21]
  62. Unlike stream ciphers, which can encrypt data of any size, block ciphers can only encrypt data in "blocks" of a fixed size.[21]
  63. To encrypt data that is less than one block long using a block cipher, you have several options.[21]
  64. The ciphertext produced by a block cipher is encrypted, so it (hopefully) looks random.[21]
  65. Most block ciphers are constructed by repeatedly applying a simpler function.[22]
  66. This approach is known as iterated block cipher (see also product cipher).[22]
  67. Many block ciphers can be categorised as Feistel networks, or, as more general substitution-permutation networks.[22]
  68. Lucifer is generally considered to be the first civilian block cipher, developed at IBM in the 1970s based on work done by Horst Feistel.[22]
  69. The single block cipher API is used with the ciphers of type CRYPTO_ALG_TYPE_CIPHER (listed as type “cipher” in /proc/crypto).[23]
  70. Using the single block cipher API calls, operations with the basic cipher primitive can be implemented.[23]
  71. The returned struct crypto_cipher is the cipher handle that is required for any subsequent API invocation for that single block cipher.[23]
  72. The block size for the single block cipher referenced with the cipher handle tfm is returned.[23]

소스

  1. ↑ 1.0 1.1 What is a Block Cipher?
  2. ↑ 2.0 2.1 2.2 Block Ciphers - an overview
  3. ↑ 3.0 3.1 3.2 3.3 What is Block Cipher? Definition, Principles & Operations
  4. ↑ 4.0 4.1 4.2 Block Cipher modes of Operation
  5. ↑ 5.0 5.1 5.2 Tutorialspoint
  6. ↑ 6.0 6.1 6.2 6.3 Block cipher mode of operation
  7. ↑ 7.0 7.1 7.2 7.3 Block cipher
  8. ↑ 8.0 8.1 How does a Block Cipher work?
  9. ↑ 9.0 9.1 Block Cipher Design Principles
  10. ↑ 10.0 10.1 Block Cipher Techniques
  11. ↑ 11.0 11.1 11.2 11.3 Cryptanalysis and Improvement of a Block Cipher Based on Multiple Chaotic Systems
  12. ↑ 12.0 12.1 12.2 12.3 Some Notes on the Lightweight Block Cipher PRINCE – Assured
  13. ↑ 13.0 13.1 13.2 13.3 Block Cipher: Definition, Purpose & Examples
  14. ↑ 14.0 14.1 14.2 14.3 Block Cipher in the Ideal Cipher Model: A Dedicated Permutation Modeled as a Black-Box Public Random Permutation
  15. ↑ 15.0 15.1 Best 2 Definitions of Block-cipher
  16. ↑ 16.0 16.1 16.2 16.3 Symmetric Block Cipher Facts
  17. ↑ 17.0 17.1 17.2 17.3 Block Ciphers
  18. ↑ 18.0 18.1 Does this code qualify to be a block cipher
  19. ↑ 19.0 19.1 When Is A Block Cipher Not A Block Cipher?
  20. ↑ Cipher Block Modes
  21. ↑ 21.0 21.1 21.2 21.3 Padding oracles and the decline of CBC-mode cipher suites
  22. ↑ 22.0 22.1 22.2 22.3 Block cipher
  23. ↑ 23.0 23.1 23.2 23.3 Block Cipher Algorithm Definitions — The Linux Kernel documentation

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  • [{'LOWER': 'block'}, {'LEMMA': 'cipher'}]
  • [{'LOWER': 'block'}, {'LEMMA': 'cipher'}]
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