Write some Software


The DES algorithm uses keys of length 56 bits, which, when DES was originally designed, was thought to be secure enough to meet most needs. However, the increase in computing power makes it more tractable to brute-force crack a 56-bit key. Thus, an alternative version of DES using longer keys was desirable. The result, known as Triple DES uses two 56-bit raw keys k1 and k2 and is implemented by composing DES with itself three times in the following way:

E3DES(p) = EDES(k1,DDES(k2,EDES(k1, p)))

Here, p is the plaintext to encrypt, EDES is the usual DES encryption algorithm and DDES is the DES decryption algorithm. This strategy doubles the number of bits in the key, at the expense of performing three times as many calculations. This approach was shown to offer only the security of a 57-bit key rather than 112 bits as you might expect.)

The TripleDES decryption algorithm is just the reverse:

D3DES(c) = DDES(k1,EDES(k2,DDES(k1, c)))

For this part of the project, implement a class called TripleSDES that provides the following methods and calculates the TripleSDES encryption.

public static byte[] Encrypt( byte[] rawkey1, byte[] rawkey2, byte[] plaintext )

public static byte[] Decrypt( byte[] rawkey1, byte[] rawkey2, byte[] ciphertext )

Compétences : Java

Voir plus : software write mq4, software write chip epson, useful software write book, software write web specs, free software write user guide, software write edid, free software write company profile, software write websites idea, software write book images, software write books, write program accept number store digits array, software write protection, free software write book, pune software freelance project contact number, php write xls file number, software write book, software write protect software, software write technical manual

Concernant l'employeur :
( 2 commentaires ) Long Beach, United States

N° du projet : #13458967

20 freelance ont fait une offre moyenne de 244 $ pour ce travail


Hello I'm interesting your project very well I'm a Good C++, Ruby, OpenCV, Math, Jave, Algorithm expert. I m quite well experienced in these jobs. Let's go ahead with me I want to service for you continously. Plus

309 $ USD en 10 jours
(279 Commentaires)

Hello I am Java and Algorithm expert and interested in this project. I have reviewed the details and attached file and confident to handle it perfectly. I have a lot of experience in helping in students with as Plus

200 $ USD en 3 jours
(373 Commentaires)

I can deliver the code [url removed, login to view] requirements

250 $ USD en 5 jours
(21 Commentaires)

Good day! I`m expert Java Dev with more than +7 years in It area. I have a success career in web/soft development using cutting edge Tech with latest frameworks in Java. Best Regards

255 $ USD en 3 jours
(28 Commentaires)

Hello, You can see my last project which are based on Algorithm Development Machine Learning and I can complete your project perfectly. We have 10+ years experience in Java software development. We have successfu Plus

200 $ USD en 5 jours
(23 Commentaires)
155 $ USD en 3 jours
(27 Commentaires)

Hi, I can start work on your project immediately once you confirm me and i am also open for further discussion if you want. I have 7+ years in web designing & development with good experience in following skills Plus

200 $ USD en 3 jours
(2 Commentaires)

Hi, I have previously worked on few projects based on cryptography. I have 6 years of java development exp. All my previous projects had 5/5 ratings So do have a chat before awarding to someone else I am sure we Plus

55 $ USD en 3 jours
(21 Commentaires)

Hi, I am Rifat from XenialIT, leading freelancing company in Bangladesh.I am very good at Java having 3 years of experience coding with this language.I am eagerly waiting for your response

150 $ USD en 3 jours
(21 Commentaires)

Expert in encryption and decryption Algorithm and implement them in Java.I am experienced Java coder having 5 years of experience.I can definitely do this.

200 $ USD en 3 jours
(9 Commentaires)

I am an IITK graduate and I have 9 years of experience in software development. I have 100% completion rate and I have finished all the projects with the highest level of customer satisfaction. I usually finish project Plus

222 $ USD en 3 jours
(18 Commentaires)

HI, About the Project : We have developed similer projects before Can we talk about the project :) About ME : We have been freelancing for 10 years and has perfect reviews on all my projects. We am are Ex Plus

155 $ USD en 3 jours
(5 Commentaires)

We are happy to bid on this project. ***** We provides dedicate developers and Development and design services as well. ***** We are having a great team of Mobile developers with 7-8 years of experience in th Plus

277 $ USD en 3 jours
(1 Commentaire)

create one interface and provide two method and implemets with class and use some condition looping concept.

155 $ USD en 3 jours
(0 Commentaires)

Hello Sir, I am working on IT field since past 2 years. As i see your desire job is related on Advance Encryption Standard(AES). I worked on a thesis paper based on encryption and decryption. I can finish your job in 1 Plus

111 $ USD en 3 jours
(0 Commentaires)

I think there are pretty much examples over the net for this. Some of them are [url removed, login to view] [url removed, login to view] I can still help you with th Plus

55 $ USD en 2 jours
(0 Commentaires)

I have very good knowledge of Triple DES algorithm. I already Have worked on same type of Triple DES project.

111 $ USD en 3 jours
(0 Commentaires)

Hello, It's a pleasure to let you know that I've Completed and Delivered similar project before. All I need to work on customization part if we can proceed towards more discussion. I have gone through your project Plus

277 $ USD en 3 jours
(0 Commentaires)

Dear Client, Thanks for providing us opportunity to place bid over the project and communicate with [url removed, login to view] mainly deal in web development, SEO, Android App, software testing and graphic design. Our vision is to b Plus

205 $ USD en 6 jours
(0 Commentaires)

Dear Client, Greetings !! Thanks for providing us a chance to discuss this project. We have gone through your initial requirements. We have good expertise in this field and confident to provide you best quality Plus

1333 $ USD en 10 jours
(0 Commentaires)