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Create simple or c# and php Public/Private key RSA encryption methods.

Am looking for a very simple set of methods:

1: VB.NET or C# based (prefer VB.NET but C# is ok) for:

a. Encrypting a string message with a RSA public key

b. Decrypting/Verifying a message encrypted with a RSA private key using the public key.

2: PHP based functions to:

a. Decrypt a string message with a RSA private key (string encrypted with method 1a)

b. Encrypt a string message with a RSA private key (to be decrypted by 1b).

I would also like methods for the reverse created as well, in case they are ever needed - [url removed, login to view] encrypting with private key and a PHP function to decrypt with private key.

I would also like the coder to include instructions on how to secure this communication using a 3rd party public/private key pair.

This should be a very simple project for someone with experience in RSA cryptology, but the successful conclusion of this project will lead to another larger project in a related area (application security). This is a necessary first step.

Skills: .NET, PHP, Software Architecture

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About the Employer:
( 8 reviews ) Pattaya, Thailand

Project ID: #4128089

Awarded to:


I can do this for you in C# and PHP going from C# to PHP AND from PHP to C#. Note: There are many C# to VB.NET convertors. I should also be able to provide the VB.NET source along with the C# and PHP.

$50 USD in 3 days
(1 Review)

12 freelancers are bidding on average $95 for this job


Hello, Please read carefully: I can do the first part of your assignment, this is encryption / decryption with RSA in C#, with a small program example that encrypt and decrypt an entered text. But not the second More

$80 USD in 2 days
(50 Reviews)

hi there i would like to help you in this task thankyou

$200 USD in 2 days
(25 Reviews)

Hi Sir, I'm experienced with PHP and C#. In case of PHP, I've worked with and without mcrypt library. And RSACryptoServiceProvider for C#. Despite I'm not a cryptograph specialist, I can do this work. Let me know any More

$95 USD in 1 day
(117 Reviews)

I can use crypto libraries or can write own code for RSA

$200 USD in 3 days
(10 Reviews)

I'm very interested by this project. Please check the details that i'be sent you.

$80 USD in 2 days
(8 Reviews)

c/c++/c# developer

$30 USD in 1 day
(9 Reviews)

This is all easily doable.

$75 USD in 0 days
(3 Reviews)

Hi, i can provide the same for you with a c#/ class and also php code give me 2 hours will get back with demo app. thanks

$50 USD in 1 day
(8 Reviews)

Sir, We understand your requirement Please see the PMB. regards iScripters

$50 USD in 0 days
(5 Reviews)

Dear Sir/Mam, we are ready to discuss with you on your project .We are a team of developers and designers who are in this field from more than 20 years. We are a web design and Development Company, providing web develo More

$180 USD in 17 days
(2 Reviews)

Hello Frostfiretulsa, I have already had an similar application, encrypt and decrypt using the implementation of the RSA algorithm provided by the cryptographic service [url removed, login to view] not in php. If you are interested More

$30 USD in 2 days
(0 Reviews)

Hi there, I am experienced in this sort of coding and can start asap. I am also based in CA. Let us know and we can get started.

$100 USD in 2 days
(0 Reviews)