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TripleSDES

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

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N° du projet : #13458967

24 freelance ont fait une offre moyenne de 236 $ pour ce travail

Yknox

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7.4
dobreiiita

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7.3
srinichal

I can deliver the code to.your requirements

250 $ USD en 5 jours
(21 Commentaires)
5.5
kkscwcd

Hi, I reviewed your requirement and it's looking good for me. I am ready to complete your assignment. I am java expert and good knowledge of Encryption algorithms. You can see from my profile regarding my java experie Plus

178 $ USD en 3 jours
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6.2
TopTower22

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5.3
vorasiddh4it

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5.1
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4.5
anuragiitk

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4.2
XenialIT

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150 $ USD en 3 jours
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2.8
DamithaKD

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2.9
anish424

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3.0
freelancerkpis

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2.8
arannyamonzur

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.

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1.4
zhugguang103

Hello, I am an expert of protect & crack of apps. I have cracked&protected many apps and developed my own packer and unpacker, too. I have full knowledge and experiences with DES algorithm. I read your description v Plus

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1.0
ritesh3067

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

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0.0
megasoft3

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0.0
rsat12345

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

155 $ USD en 3 jours
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0.0
ferdoseashraf

I think there are pretty much examples over the net for this. Some of them are http://ttux.net/post/3des-java-encrypter-des-java-encryption/ https://gist.github.com/newhavengill/2573447 I can still help you with th Plus

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0.0
RubyOnRail

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

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hawkscodeaus

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0.0