Design and Simulation Triple-DES
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The document discusses the simulation of a Triple Data Encryption Standard (Triple DES) circuit using VHDL. It provides background on Triple DES, describes the design and structure of the Triple DES circuit in VHDL, and presents the results of testing the encryption and decryption functions of the circuit through simulation. Testing showed the circuit correctly performed encryption and decryption on input data using the Triple DES algorithm. The design utilized some FPGA resources but would require a clock generator and RAM for implementation on an actual FPGA board.
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IMAGE SECURITY BY 3 DES.pdfDhamuKing1 This document discusses using Triple DES (Data Encryption Standard) to encrypt images for security. It begins with an introduction to the need for encrypting digital images. It then provides background on DES and how Triple DES works by applying the DES cipher algorithm three times with independent keys. The document outlines the Triple DES encryption and decryption process and references used in the project code, which is written in Python.
New Technique Using Multiple Symmetric keys for Multilevel Encryption
New Technique Using Multiple Symmetric keys for Multilevel EncryptionIJERA Editor In a world of accelerating communications, cryptography has become an essential component of the modern
means of communication systems. The emergence of the webas a reliable medium for commerce and
communication has made cryptography an essential component. Many algorithms or ciphers are in use
nowadays. The quality of the cipher is judged byits ability to prevent an unrelated party fromknowingthe
original content of the encrypted message. The proposed “Multilevel Encryption Model” is a cryptosystem that
adopts the basic principles of cryptography. It uses five symmetric keys (multiple)
in floating point numbers, plaintext, substitution techniques and key combinations with unintelligible
sequence to produce the ciphertext. The decryption process is also designed to reproduce the plaintext
Js2517181724
Js2517181724IJERA Editor IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Js2517181724
Js2517181724IJERA Editor The document describes the design of a custom cryptographic processor for implementing symmetric key operations. The processor is implemented on an FPGA using Verilog. It includes instruction units to perform logical operations, arithmetic operations, and finite field arithmetic needed for symmetric key algorithms like AES, Blowfish, RC5, RC6, IDEA. The processor is pipelined for high speed and includes modules for an ALU, control unit, registers, and multiplexers. Experimental results showed the processor operates at high speed with low area and delay compared to a general purpose processor.
Proposing an Encryption Algorithm based on DES
Proposing an Encryption Algorithm based on DESInternational Journal of Science and Research (IJSR) In this paper, a new method for key generation using Data Encryption Standard (DES) is proposed in order to make it more secure than DES algorithm, but at the same time faster than 3DES algorithm. Some parts of the DES are modified to improve its security and performance aspects. The proposed algorithm is named XS-DES (Extra Secure DES). We modify the process of key generation to improve its level of security, and present the proposed algorithm’s design structure in more detail. We increase the size of the key from 64 bits into 128 bits, and then split the key into two halves, left and right (Kl, Kr), and each one consists of 64 bits. XS-DES will be used to encrypt some important information inside the database, like passwords, exam scores, and other confidential details. In other words, to increase the security in the database and protect it from attackers, all critical information must be encrypted using a strong encryption algorithm and a more secure algorithm (XS-DES) is proposed here. A workable Online Examination System (OES) that applies XS-DES and the original DES algorithms is developed. It has gone through some preliminary testings and a comparison is performed between the results of these algorithms based on their strengths in handling database attackers.
New modification on feistel DES algorithm based on multi-level keys 
New modification on feistel DES algorithm based on multi-level keys IJECEIAES The data encryption standard (DES) is one of the most common symmetric encryption algorithms, but it experiences many problems. For example, it uses only one function (XOR) in the encryption process, and the combination of data is finite because it occurs only twice and operates on bits. This paper presents a new modification of the DES to overcome these problems. This could be done through adding a new level of security by increasing the key space (using three keys) during the 16 rounds of the standard encryption algorithm and by replacing the predefined XOR operation with a new # operation. Our proposed algorithm uses three keys instead of one. The first key is the input key used for encrypting and decrypting operations. The second key is used for determining the number of bits, while the third key is used for determining the table numbers, which are from 0 to 255. Having evaluated the complexity of our proposed algorithm, the results show that it is the most complex compared with the well-known DES and other modified algorithms. Consequently, in our proposed algorithm, the attacker try a number of attempts 2 1173 at minimum to decrypt the message. This means that the proposed DES algorithm will increase the security level of the well-known DES.
Slide cipher based encryption
Slide cipher based encryptionMizi Mohamad This document provides information about cipher-based encryption in Java, including:
- It describes common cipher categories like block ciphers and stream ciphers, and symmetric vs asymmetric key algorithms.
- It explains the Cipher class in Java and algorithms supported like DES, Triple DES, and Blowfish. It also covers cipher modes like ECB, CBC, CFB and padding schemes.
- It provides details on how to use the Cipher class to initialize ciphers, encrypt/decrypt data by feeding it in blocks, and obtaining results. It includes a sample code example.
- It discusses special considerations for initializing password-based ciphers that require a salt and iteration count.
Hardware Implementation of Algorithm for Cryptanalysis
Hardware Implementation of Algorithm for Cryptanalysisijcisjournal Cryptanalysis of block ciphers involves massive computations which are independent of each other and can
be instantiated simultaneously so that the solution space is explored at a faster rate. With the advent of low
cost Field Programmable Gate Arrays (FPGA’s), building special purpose hardware for computationally
intensive applications has now become possible. For this the Data Encryption Standard (DES) is used as a
proof of concept. This paper presents the design for Hardware implementation of DES cryptanalysis on
FPGA using exhaustive key search. Two architectures viz. Rolled and Unrolled DES architecture are compared
and based on experimental result the Rolled architecture is implemented on FPGA. The aim of this
work is to make cryptanalysis faster and better.
Final report
Final reportJagbir Kalirai This document discusses lightweight cryptography techniques for RFID systems with limited resources. It compares the Data Encryption Standard (DES) algorithm and a simplified version called Lightweight DES (DESL). DESL reduces gate complexity by eliminating initial/final permutations and using a single S-box, providing around a 20% reduction in gates compared to DES while maintaining throughput. The document also briefly introduces the Advanced Encryption Standard (AES) algorithm.
secure file storage on cloud using hybrid Cryptography ppt.pptx
secure file storage on cloud using hybrid Cryptography ppt.pptxNishmithaHc The document proposes a system for secure file storage on cloud using hybrid cryptography. It uses AES, 3DES and RC6 algorithms to encrypt files before uploading to the cloud. This provides higher security than using a single encryption algorithm. The system allows users to register, login, encrypt files, upload encrypted files to cloud, request files from cloud, decrypt files. It aims to provide secure data storage with less encryption/decryption time compared to existing systems.
secure file Storage on cloud ppt
secure file Storage on cloud pptNishmithaHc The document proposes a system for secure file storage on cloud using hybrid cryptography. It uses AES, 3DES, and RC6 algorithms to encrypt files before uploading to the cloud. This provides higher security than using a single encryption algorithm. The system allows users to register, login, encrypt files, upload encrypted files to cloud, request files from cloud, decrypt files. It aims to provide secure data storage with less encryption/decryption time compared to existing systems.
82 86
82 86Editor IJARCET This document discusses and compares several cryptography algorithms. It begins by introducing symmetric key algorithms like DES, AES, and Blowfish that use the same key for encryption and decryption. It then covers asymmetric key algorithms like RSA that use a public key for encryption and private key for decryption. The document evaluates the algorithms by describing their basic workings, including key sizes, block sizes, number of rounds, and encryption/decryption processes. It aims to study these cryptography algorithms and analyze their performance characteristics.
82 86
82 86Editor IJARCET This document analyzes and compares the performance of various cryptography algorithms. It discusses symmetric key algorithms like DES, AES, Blowfish and IDEA as well as asymmetric algorithms like RSA and Diffie-Hellman. The performance is evaluated based on parameters like encryption/decryption time, memory usage and throughput. Experiments show that Blowfish has better performance than AES for encrypting audio files, with lower average encryption and decryption times. In conclusion, cryptography is important for network security and Blowfish performs encryption/decryption more efficiently than AES for audio files.
Java implementation and performance evaluation of some
Java implementation and performance evaluation of someAlexander Decker This document summarizes a study that compares the performance of four symmetric block ciphers - DES, Triple DES, AES, and Blowfish - under Windows XP and Linux operating systems. The algorithms were implemented in Java using the Java Cryptography Architecture and Java Cryptography Extension. Performance was evaluated based on CPU execution time for encryption, decryption, and key generation operations on files of varying sizes. Test results showed that Blowfish had the fastest performance, followed by AES and then DES, with Triple DES being the slowest. Performance was better under Linux than Windows XP for all algorithms.
DARE Algorithm: A New Security Protocol by Integration of Different Cryptogra...
DARE Algorithm: A New Security Protocol by Integration of Different Cryptogra...IJECEIAES This document proposes a new hybrid cryptographic algorithm called DARE that integrates Digital Signature Algorithm (DSA) for key generation, Data Encryption Standard (DES) for key scheduling, and Advanced Encryption Standard (AES) and Rivest–Shamir–Adleman (RSA) algorithms for encryption. It presents a block diagram of the algorithm and describes the key generation, encryption, and decryption processes. As an example, it generates keys using a passphrase and encrypts a sample message to demonstrate that the algorithm is achievable.
Module 2 network and computer security
Module 2 network and computer securityDeepak John Advanced Encryption Standard, Multiple Encryption and Triple DES, Block Cipher Modes of
operation, Stream Ciphers and RC4, Confidentiality using Symmetric Encryption, Introduction
to Number Theory: Prime Numbers, Fermat’s and Euler’s Theorems, Testing for Primality, The
Chinese Remainder Theorem, Discrete Logarithms, Public-Key Cryptography and RSA
Biomedical image transmission based on Modified feistal algorithm
Biomedical image transmission based on Modified feistal algorithmijcsit This document presents a high-performance hardware implementation of a biomedical image encryption system using a modified Feistal algorithm. The encryption algorithm is based on DES with a novel key scheduling technique. The encrypted images are unintelligible but have high clarity when decrypted. The system is implemented on an FPGA and achieves an encryption rate of 35.5 Gbit/s. It uses different keys each clock cycle, making the encrypted images very difficult to break.
J0445255
J0445255IJERA Editor International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Georgy Nosenko - An introduction to the use SMT solvers for software security
Georgy Nosenko - An introduction to the use SMT solvers for software securityDefconRussia The document discusses how SMT solvers can be used for software security applications such as bug hunting, exploit generation, protection analysis, and malware analysis by modeling portions of code or algorithms as logical formulas that can then be analyzed using an SMT solver to prove properties or generate inputs. It provides examples of how SMT solvers have been used to find integer overflows, help with program verification, and aid in defeating simple hashing algorithms.
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Design and Simulation Triple-DES
- 1. Simulation on Triple Data Encryption standard Adviser Aj. Jarern Vongshumyen By Chatsiri Rattana 47221163 Woranart Hasawayukul 47221858
- 2. Agenda Introduction Theory on Triple DES Design on Triple DES Testing and Result on Triple DES Conclusion
- 3. Introduction
- 4. Background Low security of general data transfer. Use encryption system to secure the data communicates. Then we choose Triple-DES. Apply for design digital circuit by using VHDL(VHSIC Hardware Description Language).
- 5. Objective To learn about Triple-DES(Triple-Data Encryption Standard) algorithm. To learn about VHDL(VHSIC Hardware Description Language) coding. Can design an implementable digital circuit of Triple-DES. Can simulate a circuit that perform result of encryption and decryption.
- 6. Tools for Development Xilinx Inc.Webpack 8.2i. ModelSim
- 7. Theory on Triple DES
- 8. What is DES? DES - Data Encryption Standard Symmetric system - uses the same key to encrypt/decrypt data. Ciphertext Plaintext DES Key Key Encrypt Decrypt
- 9. DES Algorithm Structure The algorithm consists of: An initial permutation of the input data Sixteen rounds of the same process –the DES round A final inverse initial permutation of the data
- 10. Step 1: Create 16 subkeys, each of which is 48-bits long.
- 11. Step 2: Encode each 64-bit block of data The Feistel ( F ) function
- 12. Mode of 3DES 3 DES – EDE (2 keys 3DES) Keys = 112 bits C = E k1 ( D k2 (E k1 (M)))
- 13. 3DES-EDE E D E k 1 k 2 k 1 Plaintext Ciphertext D E D k 1 k 2 k 1 Ciphertext Plaintext
- 14. Design on Triple DES
- 15. Schematic On Top Module
- 16. Coding Entity Top module entity test_tdestop is Port ( data_intdes : in std_logic_vector ( 0 to 63 ) ; key1_intdes : in std_logic_vector ( 0 to 63 ) ; key2_intdes : in std_logic_vector ( 0 to 63 ) ; key3_intdes : in std_logic_vector ( 0 to 63 ) ; clock : in std_logic; function_selecttdes : in std_logic; set_out : in std_logic; lddatatdes : in std_logic; ldkeytdes : in std_logic; resettdes : in std_logic; data_outtdes : out std_logic_vector ( 0 to 63 ) ; out_readytdes : out std_logic ) ;
- 18. DESCIPHERTOP 1,2,3 KEYSCHEDULE DES
- 19. KEYSCHEDULE
- 20. DESTOP
- 21. BLOCKTOP
- 23. ADDKEY
- 24. SBOX
- 25. PBOX
- 26. ADDLEFT
- 27. Device Utilization Summary Logic Utilization Used Available Utilization Slices 1398 4656 30 % Slice FF 1140 9312 12% IOB 305 232 131% GCLKs 1 24 4% MAX CLK 77.548MHz
- 28. Testing and Result on Triple DES
- 29. Test by Test Bench and Wave Form Injection Key 1,2,3 and Data to Triple DES Key1<=“DataBit”,Key2<=“DataBit”,Key3<=“DataBit” Use Text I/O Read and Write Data to Triple DES write write(out_data_out,data_outtdes); writeline(logdata_out,out_data_out); read readline(read_inputtest,read_inputtest_line); read(read_inputtest_line,input_temp); Test Bench not permission injection Output
- 30. Strategy for test Encryption Decryption Text File Text File Data
- 31. Test Triple DES ( Encryption ) Input Output
- 32. Test of Triple DES ( Decryption ) Input Output
- 33. Conclusion
- 34. Conclusion Can design and simulation circuit . Use function for simulation circuit. Can Applied Algorithm Triple DES . Circuit has delay time and cannot control some gate. Can synthesis on FPGA board but it need clock generator and RAM. Large IOB must has floorplanning to save spaces that use.