Cryptography algorithms

$50-100 USD

Closed

Posted

over 9 years ago

$50-100 USD

Paid on delivery

Two cryptography algorithms DES(Not 3DES) and AES algorithms should be implemented in four modes Electronic Code Book(ECB), Cipher block Chaining(CBC),Output feedback mode(OFB), Counter Mode(CTR). Initially when executing program the user gives message from the command prompt [login to view URL] program should allow the user to select one of the two algorithms and after selecting it should ask for the mode. Then for the given input message it should give the Encrypted and decrypted message. Key is randomly generated by the program. Requirements: 1) No need of GUI. 2) InitializationVector(IV) is also randomly generated by program. 3) Cryptography related libraries can't used as the user need to change the S-BOX values

Java

Python

Project ID: 6515603

About the project

9 proposals

Remote project

Active 9 yrs ago

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9 freelancers are bidding on average $86 USD for this job

@samitXI

Hi Sir, I am ready to work for you.I have 9 years of experience in C/C++, python , java, PHP and, MySQL. please see some of my works also check my reviews you will get better idea about my skill.I deliver quality work within time frame. Please visit my profile once. Thanks with regards, Amit

$105 USD in 3 days

4.9

(149 reviews)

7.2

@jasqwerty

I can write a DES and AES encryption routine from scratch for you, and annotate important algorithm points like sboxes. Should have it done within a day or two.

$111 USD in 1 day

4.9

(33 reviews)

5.3

@innovativementis

Hi, I'm interested. I can delivery in 3 days and I will fulfill all your requirement. Thanks, Howie

$83 USD in 3 days

5.0

(10 reviews)

3.6

@jap2013

A proposal has not yet been provided

$100 USD in 3 days

5.0

(5 reviews)

3.0

@titan6

Hi, I'm a very experienced developer. Studied high school for gifted students in math & university in computer science, I know what I should do. Just give me the job and get it done.

$50 USD in 3 days

5.0

(1 review)

0.6

@Excellentlancer

Đề xuất vẫn chưa được gửi

$70 USD in 3 days

0.0

(0 reviews)

1.6

@idlywadasambar

hello sir, I will be able to do the project in given time . Please do consider the bid. With regards, N L Ramachandrachudamani

$77 USD in 3 days

0.0

(0 reviews)

0.0

@ahmedur

As a student of Information Technology I've completed full time course on Cryptography and Computer Security. I am also good at Python and Java/ I've already done similar works for my projects. So I think I am perfect for this job.

$55 USD in 2 days