Loading...

Messages

Proposals

Stuck in your homework and missing deadline? Get urgent help in $10/Page with 24 hours deadline

Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.

Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support

What is the name of this compound

22/12/2021 Client: muhammad11 Deadline: 2 Day

1A Review of Literature Concerning RC4andAn Improved Cryptosystem Based Upon RC4Michael LeeComputer Science Dept., University of California at Santa Barbarakirbysdl@cs.ucsb.eduAbstract. This paper discusses important features and issues surrounding the RC4 encryption algorithm. I begin by introducing the study of stream ciphers as an important field of cryptography. I then proceed to examine the RC4 algorithm itself as well as a popular implementation of the algorithm known as Ciphersaber. In particular, I review and analyze security concerns of both RC4 and Ciphersaber. I conclude after proposing and briefly discussing a modified Ciphersaber cryptosystem that works around the known security concerns of RC4.1IntroductionCryptographic algorithms can be broken into several major categories. First, they can be classified as public-key or private-key cryptosystems. Private-key systems are further separated into stream ciphers and block ciphers. Block ciphers generally encrypt a large block of plaintext at a time, whereas stream ciphers encrypt one datum at a time. Stream ciphers are popular for several reasons. The first stream cipher, known as a one-time pad, [Ver26] is the only cryptosystem that has been proven to be unbreakable [Sha49].However, the one-time pad had serious key management and distribution problems, so it was abandoned. Since then, stream ciphers have attempted to duplicate the one-time pad’s security while at the same time avoiding its key management problems.Stream ciphers are also generally much faster than block ciphers because of the way they operate. The keystream for a stream cipher is oftentimes generated independently of the plaintext. In fact, the keystream can even be generated prior to the encryption step. During encryption, each element of the keystream is combined with each element of the plaintext to produce the ciphertext. The combining function used is usually the exclusive or operator (XOR). In the past, stream ciphers usually implemented a combination of linear feedback shift registers (LFSRs). However,
2attacks have been developed that will break most systems of LFSR-based stream ciphers. 2The RC4 Stream CipherRC4, Which stands for “Ron’s Code 4,” [RivFAQ] is an example of a stream cipher that does not use LFSRs. Ronald Rivest designed it for RSA Data Security, Inc. (RSADSI) in 1987. It was, and is still considered by RSADSI to be confidential and proprietary. However, in 1994 an anonymous contributor posted an algorithm to the Cypherpunks mailing list that has since proven to be compatible with RC4 [Cyp94]. Henceforth, this alleged RC4 algorithm will be referred to as RC4, because it is overwhelmingly likely that it is the same as the official RC4 algorithm. The legal status of RC4 isthe source of some debate [Sch96] [Rei97]. There are two ways to protect an invention: either patent it or keep it a trade secret. Keeping an invention as a trade secret is dangerous because it can be leaked, reverse-engineered, or otherwise discovered by the public. Since RC4 has apparently been leaked, it can no longer be considered a trade secret. However, RSADSI would most likely attempt to sue anyone who uses RC4 in a commercial application without a license, and the cost of litigation would probably outweigh the cost of obtaining a license.RC4 is a very popular stream cipher. First of all, it is extremely fast. Optimized versions of RC4 can encrypt over 20MB of data every second on a 150MHz Pentium [SW97]. In addition it is simple enough to code from memory and it is still unbroken after over a decade. It is used in Lotus Notes and Oracle Secure SQL [Sch96], the Secure Sockets Layer and Secure Shell protocols, and dozens of other applications. It is small both in code size because of its simple algorithm and in memory footprint because of its 256-byte state table. Lastly, it is also popular because it is unusual. RC4 is one of the few strong stream ciphers that do not use LFSRs.3The RC4 AlgorithmLike most stream ciphers, RC4 generates a keystream from its internal state. The cipher operates in OFB mode, which means that the next state is derived from the current state and the current keystream byte [RSAFAQ]. RC4 uses an array of 256 bytes containing a permutation of the integers 0 through 255 as its internal state. Its operation has two phases: the setup phase and the encryption/decryption phase. All math is done modulo 256, which is the size of the state table. During the setup phase, the state table is first initialized such thatstate[i]=i i=[0, 255]. This is done in lines 107-108 (please refer to the attached source code for line numbers). Next, the key is mixed into the state table in lines 114-117. For each of 256 iterations, i is incremented (line 114). Then, j gets incremented by the ithelement of the state and the ithelement of the key in line 115. Notice the modulus operator causes the key to effectively wrap around on itself, so that a key of length less than 256 may be used. Finally, the elements indexed by i andj are swapped in line 116.

Homework is Completed By:

Writer Writer Name Amount Client Comments & Rating
Instant Homework Helper

ONLINE

Instant Homework Helper

$36

She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up!

Order & Get This Solution Within 3 Hours in $25/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 3 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 6 Hours in $20/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 6 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 12 Hours in $15/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 12 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

6 writers have sent their proposals to do this homework:

Solutions Store
Top Rated Expert
Smart Tutor
Online Assignment Help
Engineering Mentor
Finance Master
Writer Writer Name Offer Chat
Solutions Store

ONLINE

Solutions Store

I am an experienced researcher here with master education. After reading your posting, I feel, you need an expert research writer to complete your project.Thank You

$73 Chat With Writer
Top Rated Expert

ONLINE

Top Rated Expert

As per my knowledge I can assist you in writing a perfect Planning, Marketing Research, Business Pitches, Business Proposals, Business Feasibility Reports and Content within your given deadline and budget.

$70 Chat With Writer
Smart Tutor

ONLINE

Smart Tutor

After reading your project details, I feel myself as the best option for you to fulfill this project with 100 percent perfection.

$67 Chat With Writer
Online Assignment Help

ONLINE

Online Assignment Help

I have read your project details and I can provide you QUALITY WORK within your given timeline and budget.

$59 Chat With Writer
Engineering Mentor

ONLINE

Engineering Mentor

I can assist you in plagiarism free writing as I have already done several related projects of writing. I have a master qualification with 5 years’ experience in; Essay Writing, Case Study Writing, Report Writing.

$69 Chat With Writer
Finance Master

ONLINE

Finance Master

I have written research reports, assignments, thesis, research proposals, and dissertations for different level students and on different subjects.

$78 Chat With Writer

Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.

Similar Homework Questions

Parking near sydney university - Digital logic design traffic light - Week 5 Discussion 2 Professional Learning Communities - 27.1 rules for capitalization practice 1 answers - Critical Thinking Assignment: Operations Management and Factors Affecting Productivity - Titus linear bar grille - Jk rowling harvard speech rhetorical analysis - Miss fisher's workplace to kill a mockingbird - Solving equations by extracting square roots - 18 cross road myrtle bank - How many pennies make a mile - Assignment - Non first order spectra in nmr - Evidence for chemical change lab experiment 2 answers - Fife council employee local discounts - Operational Excellence - dis -4 - Combining form for gland - 28285 n st marys rd libertyville il 60048 - Anglo fatal risk standards - Https lms seu edu sa webapps login - Lumo energy my account login - Health policy Brief Analysis Paper: The Provider-Patient Relationship - Regional ring road hyderabad - Texas tech mechanical engineering - City of stonnington parking permit - Ops 571 operations consulting powerpoint - Discussion Post due08/30 10et - Finra markets morningstar com bondcenter - Corkhill bros green waste - Holy communion for the dying crossword clue 7 letters - Nursing - Collaboration and Student Success - Gakkoo seikatsu preparation for senior japanese - Case analysis - Big shoes to fill case study - Act planning and land authority - Problem solution presentation topics - 50 ml volumetric pipette uncertainty - Clean needle program adelaide - Research assistant job description - Research journal of english language and literature rjelal - What distinguishes a freehold estate from a leasehold estate - Mit power electronics lab - The calorie lab - Quasi historical documentary about famous rock musicians and their careers - Audit procedures for bad debts - Intro to American Politics Class: News Story Analysis - How to ask supervisor for feedback - Nursing assignment - Compare and contrast a business case and a business plan - 2 responses - Humn 8660 - Week 1 Activity: Social Location Reflection - Professional nursing practice concepts and perspectives free pdf - Mountains and ice biome - Andrew jackson quotes on indian removal - Met office hazel grove - Potassium nitrate water solubility - Nasa acoustic test chamber - New testament church ballynahinch - Light amplification by stimulated emission of radiation - Module 6 project economics - Find the cube root of 10648 through estimation - Holy sonnet 9 analysis - Erodium reicharrdii pink galaxy - Jd group financial services - Abl online money transfer - Beauty and the beast stage props - Stores material within the cell - Center of mass of a semicircular ring - Edexcel history a level grade boundaries - Green ox case study - Sword art online monopoly - Ecs electrical cable supply ltd - Final Retrospective Research Proposal - Lady macbeth character traits - Nordic travel agency statement of owner's equity - Heavy lifting safety procedures - Second warning letter to employee - How much does capsim cost - Super teacher worksheets homophones - What is a philosophical question - Conduction loss in diode - 8 point dif fft example - Healthcare Informatics and Technology - Degree of curve formula in surveying - Rank the following carbocations in order of increasing stability - Physical Database Design - What are the characteristics of chemical equilibrium - Adolf loos tribune tower - Flaws metaphorically 7 little words - Inert sidewinder missile for sale - What major factors help influence salespeople's ethical conduct - Pedagogy of the oppressed chapter 2 summary - 3 page essay .. talk to me first about intructions - Greg norman wife kirsten kutner - Cafod ash wednesday liturgy - Strategic Planning Discussion - Tata motors case study analysis - Neo behaviorism in psychology