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RSA

Great Reads

RSA Encryption in PL/SQL

by Juan F. Paleo

Encrypt data with RSA Public Key

OpenSSL Tour for Win32 Developer

by Huzifa Terkawi

This article will aim to give you a brief and to point tutorial about DES modes , hash Functions , AES , RSA algorithms and example of their usage , using OpenSSL.

Issues in Generating RSA Key Pair for GitHub

by Mark Vinod Sinnathamby

Issues in Generating RSA Key Pair for GitHub

Latest Articles

RSA Encryption in PL/SQL

by Juan F. Paleo

Encrypt data with RSA Public Key

OpenSSL Tour for Win32 Developer

by Huzifa Terkawi

This article will aim to give you a brief and to point tutorial about DES modes , hash Functions , AES , RSA algorithms and example of their usage , using OpenSSL.

Issues in Generating RSA Key Pair for GitHub

by Mark Vinod Sinnathamby

Issues in Generating RSA Key Pair for GitHub

All Articles

RSA

What is the weaknesses in this rsa code and how to improve it

6 Mar 2016 by OriginalGriff

"This a homework And the teacher asked for this"And that means he wants your thoughts: not ours.We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify...

Can somebody explain this code, make comments? RSA cipher.

10 Dec 2015 by OriginalGriff

Do you have any idea how much work explaining code line by line is?Every single line needs a paragraph of explanation! For example: int next = r.Next();Create a new variable called "next" which can hold a integer value. From the previously declared Random instance "r", call...

RSA public private key encryption

26 May 2016 by KarstenK

My first hit is: CryptEncrypt when I google rsa encryption microsoft c++.I dont get that you havent found it...

How to create container in RSA algorithm

29 Oct 2018 by Dave Kreskowiak

NEVER encrypt passwords. ALWAYS hash them instead. Salted Password Hashing - Doing it Right[^]

RSA Encryption in PL/SQL

12 Aug 2020 by Juan F. Paleo

Encrypt data with RSA Public Key

ASN 1 Decoder in Swift

23 Aug 2015 by paulortiz

Hi Guys,We are currently in the process of migrating our codes from Javascript to Swift with Objective C supported libraries. Our encryption algorithms was written using Javascript, and I found out that we are using ASN1 structures. I was wondering if any of you knows any ASN1 libraries that...

ASN 1 Decoder in Swift

24 Aug 2015 by KarstenK

Swift isnt so wide spread now and here, so you better to Objective-C. My tip would be interesting approch to wrap OpenSSL into Xcode.The professional software from Chilkat has also Swift Example.Lastly I found that ASN1C on Github.I really would like to hear from you how you solve...

How to solve OAEP Padding exception in RSA encryption ?

14 Sep 2015 by Rasoul Takalloo

Hello;I(server) use this code to decrypt text that sent by client.Text encrypted by publickey of server. class RSAcryption { private static bool _optimalAsymmetricEncryptionPadding = true; public static void GenerateKeys(int keySize, out string publicKey, out...

Can somebody explain this code, make comments? RSA cipher.

10 Dec 2015 by Sergey Alexandrovich Kryukov

Please see my comment to your comment to Solution 1.morris “mason” bonham asked:Maybe someone have done anything familiar and can share it…Look, for example, at this implementation: https://code.google.com/p/rsa[^].But don't expect explanation of the code. OriginalGriff and I...

Can somebody explain this code, make comments? RSA cipher.

10 Dec 2015 by Patrice T

Wrong question: so no possible solution here.If you need explanation about this code, I deduce that it is not your code. Why not ask the author ?Explanation of this code line by line is more about knowledge of the language and will never help you to understand the RSA cipher...

Can somebody explain this code, make comments? RSA cipher.

11 Dec 2015 by Aescleal

Does this line...cin >> message;...really do what you think it does?If you can work that one out then that's the root cause of the whole message not being encrypted.As for the other error perhaps have a dig through the code for ce() and cd() and work out what they're supposed to...

Can you edit padding parameters for rsacryptoserviceprovider?

25 Feb 2016 by alfman79

I'm writing an RSA encryption code on vb.net using the RSACryptoServiceProvider class. You get the option to use pkcs v1.5 or OAEP padding but i can't understand if it's parameters can be shown or are accessible to edit. Is it possible to edit the parameter for the padded bytes and import...

Error in system.security.cryptography.rsa does not contain definition for encrypt

12 Mar 2016 by HitsugayaHisagi

I was trying out the RSA encryption code, referring to some of the codes online, and I tried this var encryptedData = RSA.Encrypt(testDatabyte, publicKey)but error came out mentioning that System.Security.Cryptography.RSA does not contain definition for EncryptI am using .NET...

Error in system.security.cryptography.rsa does not contain definition for encrypt

12 Mar 2016 by Garth J Lancaster

you dont show us how you instanciate your 'RSA' object - it needs to be of type RSACryptoServiceProvider I suggest you start here for a working example RSACryptoServiceProvider Class (System.Security.Cryptography)[^][edit] and please dont post the same question in more than one forum [/edit]

1024-bit RSA cryptography

11 Apr 2016 by Kornfeld Eliyahu Peter

RSA[^] is RSA, not matter what bit size you choose...But it is better to use larger, probably the largest available (4096 today with public libraries), and in any case not less than 2048 (1024 bit was proved as breakable in 2003)...

Encryption/decryption using RSA c#.net

30 Jun 2016 by Member 11960509

Hi AllI have generated public-private key pair(RSA 4096 bits) using puttygen and I am using this key in my C#.net code. Basically the idea behind generating these keys is to give the public key to the client and they would encrypt the file using this public key and put this file on a secured...

How to encrypt text, when my private key is in the XML file?

11 Feb 2017 by Member 12995193

Hey,can you help me? I want to encrypt text, when my private key is in the privat.xml file. My code doesn't work.Thank you so much for help and your time.What I have tried:private void button2_Click(object sender, EventArgs e) { // convert the string into byte array ...

How to encrypt text, when my private key is in the XML file?

11 Feb 2017 by Patrice T

Simple: privat.xml is not your key, it is an xml file that contain your key embedded in the xml structure.You have to read the file as an xml file and then get the key in the structure.

Soap message signing

6 Apr 2017 by Renjith Kalarikkal

Dear All, Good Day, I am working on a SOAP Web Service, where i want to make soap message signing. i have done the Message signing using the rsa, but i need to create the signature based on RSA SHA256. When i am trying to import the key and perform the message signature, i want to get the...

How to sign a file using RSA algorithm and verify the signature in ASP.NET with C#?

27 Apr 2017 by RickZeeland

Not a code only solution, but you could try the Windows Signtool.exe. Here is an article about it where RSA is also mentioned: [5 Code Sign Examples]

Javascript encryption using RSA compatible with .NET using bouncy castle library

9 May 2017 by Richard Deeming

Don't. Seriously, don't. What protection do you think this could possibly offer? If you're trying to stop someone eavesdropping on the communication with your site, get an SSL certificate. Not only will that automatically encrypt the communication between your server and the client, it will...

Sign document with RSA parameters

2 Aug 2017 by Levent Yağcıoğlu

Hello everyone, I wanna ask question about RSA sign on C#. I have one document for sign. I have plain hex values of modulus, private exponent and public exponent. I dont' t want to signing with random generated keys. When I try with sign with sign tool, i have got result perfectly. But i can'...

Sign document with RSA parameters

2 Aug 2017 by Thomas Daniels

You can create an RSAParameters instance: RSAParameters Structure (System.Security.Cryptography)[^] And then pass those in an RSACryptoServiceProvider[^]: RSAParameters parameters = new RSAParameters { D = ..., DP = ..., .... }; using (RSACryptoServiceProvider rsa = new...

PKCS#8 in C# (SHA256 with RSA)

14 Oct 2017 by OriginalGriff

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action. Try it yourself, you may find it is...

How to generate thomson reuters API keys?

19 Jan 2018 by Promis Patel

Hello, I am working on Thomson Reuters API integration for website. I have also referred their document and have done some R&D. I am able to generate Key-1, but not able to generate Key-2, Key-3 and Key-4. I am using C#. Can anybody please help me out? Sample code or link would be appreciated....

How to generate thomson reuters API keys?

19 Jan 2018 by OriginalGriff

Ask the people who created it - they have a "developer community" of people who specifically work with the APIs: Design. Code. Build. Innovate. | DEVELOPER COMMUNITY[^] They will know more about it than we will.

How RSA encryption work after publishing the web site

13 Apr 2018 by Member 12666574

I have a web site uses RSA for encrypt some data. when i run it on local host, the RSA function works correctly. But after publishing my web site the function gives me an error. the function call is Cryptography encryptor = new Cryptography(); string pkpath = Server.MapPath("publickey.xml");...

How to decrypt an encrypted string using RSA 2048 algorithm in C#?

23 Jul 2018 by OriginalGriff

Read the error message, it's pretty clear: Quote: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters. That means exactly what is says - the string you are trying to convert from...

How to get public key and private key in rsa algorithm

13 Aug 2018 by Member 8583441

I can't able to understand how the keys are getting from the rsa.toxmlstring method. For this i am seeing this website "rsa - Find the public and private keys using RSACryptoServiceProvider in c# - Stack Overflow[^]" to understand how to generate the keys but i can't please explain me clearly...

How to get public key and private key in rsa algorithm

13 Aug 2018 by OriginalGriff

Quote: I can understand it is console application main method but where it has to be considered in web application i am asking To be honest, if you don;t understand that, then you shouldn't be playing with anything to do with security - this is basic stuff than any competent web developer has...

RSA - encryption witch java/android and decryption with PHP

27 Nov 2018 by Zhivko Kabaivanov

I have mobile application that encrypts strings with RSA and sends that encrypted data to PHP web server. After a search I found that phpseclib is used to decrypt RSA Latest version 2.0. No matter what I do I receive despite error despite used mode Am i doing something wrong? What I have...

How to encrypt with private key and decrypt with public key in dotnet core RSA

14 Dec 2018 by Ariel Quiroz

I found several solutions where I can use the RSA Provider to Encrypt a message with the public key and Decrypt it with the private one. But what I want to have is to Encrypt with the private key and Decrypt with the public key. I want to store the public key in my app and encrypt a license...

How to encrypt with private key and decrypt with public key in dotnet core RSA

14 Dec 2018 by OriginalGriff

It's not supposed to work that way: the public key isn't safe if it's inside your app, because anyone who has access to the app can get the public key from that! See here: cryptography - Can one encrypt with a private key/decrypt with a public key? - Stack Overflow[^]

Can not set our p and q values manually in RSA algorithm

31 Jul 2019 by Danny96

I have the C# code that does encryption with RSA algorithm but I want to give my own p and q, when I try to give for instance; p=11 q=5 manually. When I try to set my values manually inside Create() method, it gives me error at ModInverse() saying System.ArgumentException: 'a is not...

Failed to decrypt using provider 'rsaprotectedconfigurationprovider'

17 Oct 2019 by Manoj Chamikara

Hi All I have to do update APS.Net MVC System someones did long time ago. there is a problem to run page while debugging web.config file section called appSecureSection. that developer leave the company long time ago and cannot to contact him Is there is any way to do this ? Thanks In...

Convert from jpasswordfield to publickey?

19 Apr 2022 by kandy 2022

suppose you ask user to generate public_key using JPasswordField and then you should take this public_key to encrypt random_key what should I do? What I have tried: public void AESEncryption(File file) throws FileNotFoundException,...

Windows security smart card select a smart card device C#

8 Aug 2022 by Gerry Schmitz

Re: Windows Security Smart Card popup Redirecting[^]

OpenSSL Tour for Win32 Developer

6 Aug 2015 by Huzifa Terkawi

This article will aim to give you a brief and to point tutorial about DES modes , hash Functions , AES , RSA algorithms and example of their usage , using OpenSSL.

How do I encrypt a csv file with a public key in C#

12 Dec 2017 by OriginalGriff

We aren't here to do your work for you: and if you have code that works but isn't for your environment, then it's important that you understand the code enough to transfer it to your new environment. We aren't here to explain someone else's code to you: we don't have time to write line by line...

Issues in Generating RSA Key Pair for GitHub

24 Feb 2011 by Mark Vinod Sinnathamby

Issues in Generating RSA Key Pair for GitHub

Can somebody explain this code, make comments? RSA cipher.

10 Dec 2015 by morris “mason” bonham

This code should encrypt and decrypt text with RSA cipher. If I have spaces in text for encryption, then it doesn't encrypt words after space. Also it doesn't show possible values of e & d.#include...

RSA public private key encryption

26 May 2016 by Member 11346124

RSA Public Private Key Encryption Algorithm Implementation Source code in C or C++ example on HTTP or HTTPS or FTP Reference or Guide Line or Youtube video. Highly Appreciated. No External Dynamic Link Library. No external Library except Library provided by Microsoft. I have done AES...

1024-bit RSA cryptography

11 Apr 2016 by Toni Andika

RSA algorithm:1. Select two different prime numbers p and q. For security aim, the integer's p and q must be large.2. Calculate n = p * qn will be used as the module for public key and private key and n is also known as key_component.3. Calculate f(n) = (q-1)(p-1), where f is a function...

RSA Encryption with unknown format

9 Sep 2015 by Member 10693183

What can be achieved to this encrypted format?My android app send encrypted messages to the c# server but server want encrypted messages actually like this unknown formatchinese words.筊맲躥慢૬䣍毤_箬첑�沆ň䇷㨡鬩But android encrypt messages like this format...

How to sign a file using RSA algorithm and verify the signature in ASP.NET with C#?

27 Apr 2017 by Alex2 101

I want to sign a file using RSA algorithm and verify the signature Below are the scenarios: 1. Outward files will be put in a folder 3. We need to sign the file with a digital signature (using RSA 256) and send to Central Bank. 4. We need to download the response and verify the signature...

Javascript encryption using RSA compatible with .NET using bouncy castle library

9 May 2017 by Member 13084135

I need to make RSA encryption by javascript for the user login password that sent from the login page in web application to the server to be decrypted by C# library provided by http://www.bouncycastle.org/csharp. using the following code: // Generate public key using RSA encryption protected...

How do I encrypt a csv file with a public key in C#

12 Dec 2017 by Björn Kreye

Hi, my Application loads a CSV file and transforms the Data in it. This Data is stored in a List I would like to be able to encrypt every row in this list with a public key and then save it to a new CSV file. After I saved the file with the encrypted data, I would like to encrypt this file...

How to decrypt an encrypted string using RSA 2048 algorithm in C#?

23 Jul 2018 by ranio

I want to decrypt an encrypted string using RSA 2048 Algorithm. I am able to encrypt the same successfully. But while decrypting I am getting the exception as below: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal...

How to create container in RSA algorithm

29 Oct 2018 by Member 8583441

I am a learner in creating password encryption and decryption using RSA Algorithm. I want to create SHA256 with 2048 keysize for user to login and register. What I have tried: i don't know how to start please explain me in brief creating a keycontainer thanks in advance

Windows security smart card select a smart card device C#

8 Aug 2022 by bmarcco

When use the code below, windows throws me a dialog with the following message,"Windows security smart card select a smart card device" does anyone know why this is happening and how to prevent it? https://i.stack.imgur.com/hcSqU.png[^] What I...