Like Nish said, there are way too many factors, situations, and possible requirements. We have no idea of the environment you're in, how secure it has to be, or anything even remotely associated with access control. It's a decision only you can make.
Open your crystal report in design view. Locate the data source and click "Verify Database". Log on with the appropriate user and password, and the missing fields will magically appear!
i am trying to develop a cross platform application that will run on windows, iphone and android. and i would like to implement AES256 encryption for every platform. so my question is:does AES256 encryption for each system will be compatible among them? i mean if i encrypt using AES256...
Q. Is there any open source library which can be used on Linux for Licensing & Product Activation related stuff? If No, then is there any near by alternative?Detailed Q. : The Licensing scheme is as follows:1. A unique Serial No./Product Key is assigned to user2. A public key (pgp) or a...
I have just published an article exactly answered this question. I know my post it's a little late to the party, but anyway, here's my article. cheers AES Encrypted Data Transmission between Arduino (ESP32) and C# (ASP.NET)[^]
If you're not familiar with classes and header files you're going to have fun implementing anything in C++. If I were you I'd wrap my head around includes and abstract data types and then use libcrypto which is part of the OpenSSL[^] distribution. It's a C library rather than a C++ one but it's...
Hi,I am doing VB programming. I just have started. I want to know how the programmers make codes like strings and loops and their by passing ways and their methodology of making new programs ......applications. I want to learn the source codes creation methods. Help me out...
Actually, you have not shown the implementation of this class. The following two snippets are just the "pseudo-code" for the algorithm. What do you think, did you implement it? Does the code work well? From the code, it is clear that i is zero, so only the first block would execute and a few...
Hi,I need to create an application in c# which will communicate with SafeNet's HSM Device. As of now i am assiged with a task that this C# console application could interact with the HSM device and check a particular key is valid or not.For this , I have installed ptkc-sdk...
27 minutes ago|LINKHI all,How to retrieve the public key, which is exported and saved in a disk using c#. And then i need to convert it to RSAPublickey type.Or i have a public key in my disk .So now i want to read that file and create an RSAPublickey object from that.How that can be...
I think the issue is nothing to do with encryption but is related to the decode/encode cycle shown on the right hand side of the diagram.array(A) - Decode -> String (B) - Encode -> array(C)Your code does not show the full details of this conversion but implies that you are...
Here[^] are the build instructions for Windows (32bit, there's a different doc for 64bit). After you've built and installed the openssl libraries, add the include paths (openssl/include or inc32/) to your Visual Studio library paths and the library binary paths (openssl/lib or out32dll/) to your...
First you have to decide which hash algorithm has to use. Because once you hashed the files then changing the algorithm will be a waste. There are lot of hash algorithms with .Net framework, Keyed and Non-Keyed. Each has different purpose. For example MD5 is good at small files. But for very...
Besides the cryptographic information about your actual key, the key files always contain some metadata, as to when the key was generated, whether it is packed, if so what kind of packing (base64 etc) was used to pack the key etc.Try to open your key in a notepad to see if you can get any...
Hi :)I'm studying some things about cryptography, and I wonder what is the best system of 128-bit encryption, and how to implement in C/C++ or C#.ThanksAlexandre
hi...i am using rijndeal to encrypt and decrypt some data! but it gives me this error :Padding is invalid and cannot be removed.i searched much but nothing help me to solve this error! tis is my encrypt/decrypt codes:public string Encrypt(string text) { mainRM = new...
Greeting, I want to codes which create Encryption in Arduino-C and can be Decrypted into c#. is it possible ? Using algorithm AES or any other an algorthim anyone help me, can provide codes AJ What I have tried: #include "AES.h" #include "base64.h" AES aes; void setup() { ...
HiI wanna know the programming assumption made for the POINT AT INFINITY(O)in elliptic curve cryptography,which is the basis for finding the order of generating point or the base point in (Fp)i.e nG=O how can i calculate n?and an assumption for O?thanks[edit]Subject: don't SHOUT! All...
Hi All,Is there any cryptography system developed in which the key is not sent from server to client for decryption.I mean the keys are extracted via some other methods at the client side itself to decrypt! anybody knows?Please help me.
Hi friends, we know RSA key pair need p,q (prime numbers), and if we want to generate RSA key on 128 bit length we need to generate p and q on 128 bit length and do some math with them. my problem is how to generate these big prime numbers and...
You are generating the nonce incorrectly. Your 'sodium.randombytes_buf(i)' function expects the argument of 'i' to be the length of the buffer (in bytes) to be generated, not the actual value of the nonce length as per your code. The...
I have not been able to find a clear example of how to store an encryption key in a key container using C#. I can generate my own keys and use them to encrypt and decrypt data. Now I am wondering two things:1. Is it realistic to consider the Microsoft key containers as a reasonably secure...
I have a small app that needs user credentials to operate. Whats the best way(library) to store those credentials for later use using .NET Thanks in advance.
Hi every body, I am new to RSA and Cryptography and i need to encrypt and decrypt data using RSA,I have a java program which generates a key pair and save them in a .key files with XML format, then I want to use them in .net application , I am importing the keys to be used for encrypt and...
Hello,I have published version 1.3 of an smart client application on my intranet. The deployment goes fine. However, when I try to install the application on my system from intranet I encounter following problems.A. "The publisher can not be verified. Are you sure you want to install...
I want some help with the implementation of sha256 and ripemd160 hash in the c program. Does anyone know how can I perform sha256 on a char array? I wrote a code #include #include #include int main...
I want to code a c program to perform ripemd160 hash on a char array. But I cannot figure out how could I do it. Can anyone suggest a c code to do the following? What I have tried: I came across this function in OpenSSL but I cannot figureout...
I wrote a c program to calculate ripemd160 hash on a 64-byte char array.But it give me the wrong output. This is my code: #include #include #include int main (void) { unsigned char s[7] =...
I wrote a c program to perform sha256 hash on a char array and then perform ripemd160 hash on the output of the sha256 hash function. here is my code: #include #include #include #include
I have a function that returns a bitcoin address but I want to perform base58check encoding on it to convert it to a bitcoin address. unsigned char address[]="008f26a17cbbc941a9dbe63a1f1c69591f08aab94bd586ad5e" The address is stored in an...
hello all,I am new to cryptography and need you urgent help.* I want to generate a set of asymmetric keys based on a password.* Use Private key to encrypt a string to cipher text* Use public key in my program to decrypt the cipher text from a text file* Use the decryped information...
Hi All,How to encrypt image with AES algorithm? How much is the size difference (increase/decrease)after encryption? Is it possible to perform encryption with java script ? Thank you for your suggestions in advance...:)--Avinash
To split a line you need:string[] data = csv.Split(new char[]{','});or make char array e.g: delimiter="," string[] data = csv.Split(delimiter.ToCharArray());Also 11th column is 10, 12th column is 11.
hi their , I have generated private and public key in java. whereas public key size is 1kb and private key size is 2kb. i googled lot but unable to understand the core. help me out.Thanks in advance:)
I'm in the process of creating a bunch of attribute certificates, using custom X509 extensions, that all works; this is just the backgroundWhen those certificates are displayed in the MMC Certificate Snapin, the OID's of my attributes aren't registered, so under the Certificate Details tab,...
Hi every oneI am working on a project which is running on an embedded pc and I am developing by C# language in visual studio 2008 and I have a database using sql server ce.I want my code and my exe file not to be decompiled.what is the best solution?TnX
There are several things to look at:- are the data on the original stick really PCM data, or are the encrypted? I.e. can you play these data with e.g. Windows Media Player, Audacity, etc.?- the communication between the USB stick and the keyboard. It looks like the keyboard reads some more...
Dear All,I have created Key container with the help of "RSACryptoServiceProvider", Now I want to encrypt and decrypt with the help of key which store in key container.Please help me out Its very urgent.Your replied will be highly appreciated.CspParameters cp = new...
Hi All,My client required to encrypt password using symmetric key cryptography(Private Key).When user account will be created then password of the user will be encrypted and save in the database table with the help of the private key.The private key should be change with some...
I have some client requirement to save the key in key container, I have already generated key and I want to store it in the key container. Is it possible to do it?I am using AES algorithm to encrypt and decrypt data.Please follow the below code.public string Encrypt_AES(string...
Dear All,I have created key which can we change once in a month, Now I want to store own 64 bit key in microsoft key container. So please help me out for the same.If we use CspParameters class it automatic generate key and store in given container which name of container provide by the...
This notation will work:Int16[,] sbox1 = new Int16[,]{ {0x18,0x23,0xC6,0xE8,0x87,0xB8,0x01,0x4F,0x36,0xA6,0xD2,0xF5,0x79,0x6F,0x91,0x52}, {0x60,0xBC,0x9B,0x8E,0xA3,0x0C,0x7B,0x35,0x1D,0xE0,0xD7,0xC2,0x2E,0x4B,0xFE,0x57}, ...
Use DESCryptoServiceProvider.CreateDecryptor, and make sure you pass the same key and IV as you pass to the Javascript implementation. Then check that you've set the properties of the returned DES object for Mode and Padding to the same. The author claims that the JS implementation is compatible...
Managed to solve it myself.using System;using System.Text;using System.Windows.Forms;using System.Security.Cryptography;using System.Linq;using System.IO;using System.Runtime.Remoting.Metadata.W3cXsd2001;namespace MultipleHash{ public partial class Form1 : Form { ...
Is there any need to use IDisposable in the block of code below. I am availing of using and hash contains the SHA1 of text taken in from the user and inputData is a byte array. I assume the second block of code is correct.Example 1:using (SHA1 hash = SHA1.Create()){ txtSHA1.Text =...
Try to extend functionality of CryptDecodeObject function (http://msdn.microsoft.com/en-us/library/aa379871(v=vs.85).aspx[^]).For this You have to register custom OID decoding function in registry keyHKLM\Software\Microsoft\Cryptography\OID\EncodingType1\CryptDllDecodeObject\YourOID
Why would you want to do that? It seems awkward like you're trying to force your own will on Microsoft's tools etc. Here's why you really shouldn't do what you're asking. If you look at the Microsoft key container it looks like. ...
HiI use this code to encrypt/decrypt files. It works fine. Now I want to change it for not having to write each decrypted file to disk, I want the decryption directly to a string variable...I try this adapted code but keep on getting empty strings...What is wrong???Thx for any help...
This does the job:Function DecryptFileToString(Type As String, ByVal strInputFile As String, strOutputFile As String, ByVal PW As String) As String Dim Result As String = "" 'Setup streams to handle input and output. Dim fsInput As System.IO.FileStream ...
I have this code from Java Programming Oracle Press. Unfortunately, I can't find the error in this code. Could someone point out where is the problem?The exception I'm getting is javax.crypto.BadPaddingException (when run through Eclipse) andjavax.crypto.IllegalBlockSizeException (in...
Anyone know from where to download PGP Encryption assembly/DLL that can be referenced in C# code for further customization. I have found a similar kind of assembly provided by BouncyCastle but I am not sure whether to use it or not.Please do let me know from where i can get either an...
Loading 25000 items into a User Interface is just silly. That is the politest way I can put it. WPF collections? I think your friends are talking rubbish. How to speed up the load times? 1. You should implement some sort of paging - for example only load the first 40 items until the User...
You can Add your column in database (e.g. aspnet_users table), modify stored procedures that affects to your modified table. That's all from DB.Now in your aspnet project, Add a new class that extends from Membership or MembershipUser depends on your requirements. Add the property (column of...
Wow. The reason you long how SOME errors, is that any number that has no letter in it, is a valid base 10 number. I believe you can use 0x, as 0xBD, to specify a number in hex. If you didn't specify it, how does the compiler tell between 55 and 0x55 ?
Can any1 please suggest me some links from where I could buy ocx or dll's that i could use to add in a mechanism in my vb6 project to encrypt binary files using SHA-1 or higher
Is it possible to read a binary file such as .exe / .jpg files using C++ and encrypt it using some simple algorithm.The real question is how to read an entire .exe or jpg file into 1 dimensional array and manipulate it.
I am trying to implement RSA using a C++ class. Below is the class :class rsacrypto{ long publickey; long privatekey; long modl; //Modulus public : rsacrypto(); //To be used to just generate private and public keys. rsacrypto(long &,long &,long...
There are are many kinds of ciphers like caesar cipher,Vigenère Cipher,Bifid Cipher and many mor but how can these cipher techniques be applied to a binary file like a .exe file ?
I had written a C++ program to perform the Schmidt - Samoa Public Key encryption. The code is as below :void keygen(long &publickey,long &privatekey,long &p,long &q){ p = genrndprimes(0,10); q = genrndprimes(10,30); long n = power(p,2)*q; long d =...
I have the following expression for calculating the decryption key in a Public Key Encryption System :d = N-1 mod LCM(p-1,q-1)where N = p2q.I wrote the follwing code to find d ,long long int gendecrypkey(long long int modulo,long long int p,long long int q) { long...
I wrote a code to generate a public key and a private key value. Below is the code :void keys(long long int &e_key,long long int &d_key,long long int phival) { e_key = genrndnum(100,(phival-1)); while(gcd(e_key,phival)!=1) { e_key =...
I wrote the following C++ code for generating keys for RSA :void keygen(long long int &e_key,long long int &d_key,long long int phival) { //Code to find the encryption key. e_key = genrndnum(2,(phival)); while(gcd(e_key,phival)!=1) { ...
Probaly (well, with very high probability) the SHA-256 doesn't satisfy all the requirements (from the Theoretical definition): "it is not sufficient to make a function "lossy" (not one-to-one) to have a one-way function".
Quote:How to encrypt image with AES algorithm?Possibly using a library.Quote:How much is the size difference (increase/decrease)after encryption? There would be no significative difference (data must be aligned to encription block, for instance 16 bytes, so you may experience a maximum...
As others already pointed out, the sentenceQuote:using Public key for communication so it is vulnerable is just wrong.Have a look at this Wikipedia page "Public-key cryptography"[^].
What about The Documentation[^]? Looks you are unfamiliar with the documentese (you should fix that as soon as possible). try const char mystr = "My Beautiful String"; // first parameter is the input string unsigned long len = strlen(...
Quote: 31ed4989d15e4889e24883e4f050544c8d059a01 If that is the hexadecimal string representation of an array of bytes then you should do something like: unsigned char s[] = { 0x31, 0xed, 0x49, 0x89, ..., 0x01}; unsigned char h[20]; RIPEMD160(s,...
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