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Simple Encryption/Decryption program in C# ASP Core

$30-250 USD

Completed
Posted about 4 years ago

$30-250 USD

Paid on delivery
I need something built similar to the Windows Encryption/Decryption application here: [login to view URL] but it needs to be Core 2.0 compliant (I don't know if the above linked solution is). Furthermore I need to encrypt arbitrarily long text so I don't know if AES will suffice. If interested in this project please respond with what kind of encryption method e.g. AES, TripleDES, etc. you think would be suitable for arbitrary length text encryption with good security vs. encryption speed. It will probably take me a few days to choose someone for the project and it will depend on mentioning an encryption algorithm (so that I know the project description has been read). Product should be a ASP Core C# form with buttons and textbox's for the key, encryption and decryption strings and textbox for the encryption and decryption times.
Project ID: 24052607

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31 proposals
Remote project
Active 4 yrs ago

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Hi, If it was my choice, I would choose the AES algorithm (it is fast and secure). AES-256 is one of the most (if not the most) crypto algorithms. The 3DES will be very slow to implement in software (DES was designed for performance in hardware and 3DES chains 3 instances of DES). Can you please send me more details about your project? Depending on its purposes, maybe another algorithm will perform better in terms of security/speed. If you have an interest, you can see some of my hobby projects in my GitHub account ([login to view URL]) Thanks in advance.
$120 USD in 5 days
5.0 (10 reviews)
5.5
5.5
31 freelancers are bidding on average $149 USD for this job
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Greetings! I am a .NET Developer having an extensive knowledge in building Web Applications using ASP.NET Core MVC. I am readily available to build you an application that will encrypt/decrypt your long text content in a secure and efficient manner. Regarding the algorithms you wanted to know which would be suitable, It depends on what you want to follow. I see, you mentioned DES for encryption which I would not recommend at all because of the fact that it is a way old thing and people have reportedly cheated this algorithm because of the fact that its key size is short (proper 56 effective bits) which can be easily brute-forced and 3 DES would mean that the same text was encrypted three times with the same algorithm, which is equally insecure but it just increases the round trips to produce a final encrypted text by letting the original text go through the process three times. Whereas, AES encryption would be perfect to go with as AES accepts keys of 128, 192 or 256 bits (128 bits is already very unbreakable) and is efficient in both software and hardware. It was selected through an open competition involving hundreds of cryptographers during several years. Basically, you cannot have better than that. However, DES would be a faster algorithm as it has a key size of less than that of AES but an insecure one because of the same thing. Please feel free to write me back in case you want to discuss it further and/or to interview me. Best Regards, Jamshaid Kamran.
$250 USD in 3 days
5.0 (73 reviews)
6.5
6.5
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Hello I can develop this application for you, AES and tripleDES are both good. tripleDES is better but it is slow, but AES seems to have more speed so i think it is more suitable in your case, we can discuss more on it via chat. cheers.
$100 USD in 2 days
5.0 (51 reviews)
6.1
6.1
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I will create a program in c# .net core 2 WPF to show the button and textboxes for encryption key and times etc. I will provide all source code once complete.
$166 USD in 7 days
4.9 (35 reviews)
6.1
6.1
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I'm highly skilled in asp.net core with good experience in encryption and decryption. I can code as per your requirements if u award me Relevant Skills and Experience Asp.net core, encryption, decryption
$55 USD in 3 days
4.9 (50 reviews)
5.6
5.6
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Dear, Thank you for your job posting I have read your requirement carefully and I understood what you want. I am very happy to see the job which is matching my skills and experiences. I have 19+ years of experiences in software design and development. I have proper experience with .NET Core and cryptography algorithm. Let's chat so I can know more about your requirements and give you a final time frame and cost. Looking forward to hear from you. Thanks,
$240 USD in 7 days
5.0 (5 reviews)
5.7
5.7
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I am writing this proposal in order to work for you in Software and Web Development. We are highly trained professional developers seeking to freelance and earn online. Having a flair in programming and development I have been excellent with JAVA,C#,C/C++ and PHP programming language along with MySQL with XAMPP Server. I also build application for Cloud computing and High performance computing as I also have knowledge regarding Hadoop, MPI, OpenMP (distributed frameworks) and also have build applications in CUDA C++ and OpenCL. I also have experience with the most famous framework ASP.NET. My most expertise are in JAVA where I have built countless projects for semester projects and Final year project. You may find many developers in this field however we assure that you will not be able to find a team like us. We not only ensure the code is quality wise but we also assure that the code we write are optimised and we ensure that the program performs right operation under right environment i.e. we create programs that are defect free. You may also find freelancers that cost low but they do not put their 100% which then shows in the software and leads to an unhappy customer. We ensure reasonable price are put as tag on the job and we ensure in order to give the write product. We highly appreciate your time, if you are interested kindly let me know
$100 USD in 7 days
5.0 (46 reviews)
5.3
5.3
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Hello, I can help you with your project - Simple Encryption/Decryption program in C# ASP Core I have gone through your job posting and become very much interested to work with you. I am an expert in this field. I have already completed several projects like this. For evidence you can see my profile. Please visit : https://www.freelancer.com/u/schoudhary1553 I have excellent command over English. I am a hard worker, productive and worthy of your attention I hope, I would be the right candidate for this post. Awaiting an affirmative response from you. Kinds Regards, Sandeep
$220 USD in 4 days
5.0 (10 reviews)
5.2
5.2
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Hello Sir/Madam, I am expert in Encryption/Decryption and specially in C# ASP Core with having great experience in this field. I read your project description and I am interested in it I need some more information related to your project Can we discuss the project ? I am waiting for your response Thanks Note: Final price will be discussed after complete requirements.
$200 USD in 7 days
5.0 (10 reviews)
4.5
4.5
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Hi, I am a .NET developer. I can create a simple encryption and decryption application using ASP.NET. I just completed a similar project.
$50 USD in 0 day
4.9 (14 reviews)
3.9
3.9
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Hello, I am professional developer. I can do your requirement. My suggestions as follows, Your application should be use Advanced Encryption Standard (AES). Because AES is extremely efficient in 128-bit form and uses keys of 192 and 256 bits for heavy duty encryption purposes. Will discuss more via chat Thank You, Kapila
$250 USD in 7 days
5.0 (11 reviews)
3.9
3.9
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Hi, I can write a class in C# (Core 2.0 compliant) that can encrypt/decrypt text messages, you can use this class in your ASP project later. 3DES is slow like a sloth, I think AES is better. We can encode the final encrypted text (bytes) in base64 to make it ASCII compliant too.
$100 USD in 10 days
5.0 (4 reviews)
2.8
2.8
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Hi, Encrypt & Decrypt expert here! I have read your requirement carefully and I am going to use "AES" for encryption. I think, ASP.NET UI is not difficult and the important thing is the selection of encryption method. If you hire me, I can show you my skills and satisfy you perfectly. Please contact me via chat. Regards Milena R.
$50 USD in 2 days
4.2 (3 reviews)
3.6
3.6
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You will get an windows form as well as .net library which will encrypt and decrypt TDES and AES in both CBC and ECB modes You will be able to input data, key and IV (for CBC Mode)
$111 USD in 3 days
5.0 (1 review)
3.0
3.0
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I have gone through the details regarding c# programming, asp.net, encryption and I have got plenty of experience in c# programming, asp.net, encryption,c# programming, asp.net these kinds of work and I am available from now I am looking forward to work with you Cheers
$145 USD in 7 days
5.0 (1 review)
1.4
1.4
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Dear Mr Brain. I have 3+ years of C# ASP Core programming experience. I can do it in a few hours with the guide of the document I will also update the additonal requirement for free, if it is the big change of project. Best Regards.
$240 USD in 7 days
0.0 (0 reviews)
0.0
0.0
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Hey I read the JD, would be delighted to work on this project as i specialize in the field of network security. .NET Core offers the latest encryption techniques that offer Confidentiality, Integrity and Availability like the AES Algorithm (based on Rijndael's algorithm). This is used to encrypt the real content (data/payload) with a key. This key is shared (encrypted of course) between Applications/Clients using asymmetric key algorithms like RSA. As far as data length is concerned, it can be managed by padding during symmetric key encryption. Ping me for further details. Regards
$100 USD in 7 days
0.0 (0 reviews)
0.0
0.0
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I will make it with lowest price. And will maintain if have any problem. Have a nice day :D.........
$138 USD in 5 days
0.0 (0 reviews)
0.0
0.0
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I have more than 20 years experience in IT industry and hands on programming experience of more than 15 years in C, C++, C#, Java, etc. I have written a number of Encryption algorithm like AES (including AESCBC, AESCtr, AesGCM, etc.), Blowfish, Camelia, Rsa, RsaOaep, RsaPkcs1, and so on. Depending on what you are going to use the encryption for, you will have to choose between symmetric and asymmetric encryption (public/private key). Once you have chosen that, then you can decide on specific algorithm, key length and performance. I can provide you with any type of encryption in C# on a WPF form. If you contact me then I can send you a video of a application which does encryption/decryption including those of long strings.
$250 USD in 7 days
0.0 (0 reviews)
0.0
0.0
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I review your job description. I am interested to work with this. I will use AES256 algoritham for encryption/description. let me know for further discussion if any scope for me.
$30 USD in 1 day
0.0 (0 reviews)
0.0
0.0
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Enthusiastic full-stack software engineer with 2.5+ years of industry experience building web applications. Specialize in .NET Technologies and have professional experience working with C#, ASP.NET MVC, ASP.NET CORE along with SQL Server and participated in the complete product development lifecycle of successfully launched applications.
$100 USD in 7 days
0.0 (0 reviews)
0.0
0.0

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Flag of UNITED STATES
Fort Atkinson, United States
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Member since May 16, 2008

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