BLOCK SYMMETRIC CRYPTOGRAPHIC ALGORITHM BASED ON PRINCIPLES OF VARIABLE BLOCK LENGTH AND MANY-VALUED LOGIC

The paper deals with the problems of delayed transfer signals in the direct digital synthesizer (DDS) phase accumulator adders. Transfer delay is one of the factors that affect the maximum output frequency of the DDS synthesizer. The main types of adders used in DDS synthesizers are described. Separately, attention was paid to the adder with a consistent transfer of the transfer signal, adders with a transmission carry signal with a fixed block length, adders with a signal transmission delay with a variable block length, and a mathematical analysis of the origin and duration of the delay of the transfer signal in them. It was found that the use of a transfer adder with a variable length of a block in the core of a direct digital synthesizer would increase the maximum output frequency by 2.4 times compared to the adder with a parallel transfer, and by 1.43 times as compared with the adder with a fixed length the block.

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Robust Nonlinear Model Predictive Control With Variable Block Length

IEEE Transactions on Automatic Control ◽

10.1109/tac.2009.2017965 ◽

2009 ◽

Vol 54 (7) ◽

pp. 1618-1622 ◽

Cited By ~ 5

Author(s):

S. Hanba

Keyword(s):

Model Predictive Control ◽

Predictive Control ◽

Nonlinear Model ◽

Nonlinear Model Predictive Control ◽

Block Length ◽

Variable Block

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Penerapan Algoritma CAST-128 pada Proses Enkripsi dan Dekripsi Teks

JUKI : Jurnal Komputer dan Informatika ◽

10.53842/juki.v2i1.25 ◽

2020 ◽

Vol 2 (1) ◽

pp. 16-24

Author(s):

Yessi Sriani Barus ◽

Abdul Sani Sembiring

Keyword(s):

Block Length ◽

Cryptographic Algorithm ◽

Encryption And Decryption ◽

Cryptographic Algorithms

Encoding was first made using a classic algorithm. This algorithm builds its security on the confidentiality of the algorithm used. However, this algorithm is inefficient when used to communicate with many people because the algorithm is still very simple and still very easy to solve, so important information or data that you want to keep secret can be easily discovered by other people or people who are not responsible. CAST-128 is a cryptographic algorithm that is said to be similar to the DES algorithm which uses 16 rounds of feistel network as one of its strengths. Where in the process of encryption and decryption of text CAST-128 uses a 64-bit block length and key lengths of up to 128 bits. For information, the CAST-128 algorithm is referred to as one of the strong cryptographic algorithms against various types of cryptanalysis, including differential and linear attacks. With the application of the CAST-128 algorithm in the process of encrypting and decrypting text, it will be more difficult to decode text encoded by people who do not know the key so as to create more security than the encoded text. So when the text wants to be sent or transferred to the flashdisk will be more confidential.

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