473,763 Members | 1,356 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

How to increase block size in DES encryption/decryption??

52 New Member
Hello,
I am making a DES encryption/decryption program using OpenSSL library.
I am using function
Expand|Select|Wrap|Line Numbers
  1. des_ecb_encrypt(des_cblock *input, des_cblock *output, des_cblock *keysched, int mode);
  2.  
This function can encrypt/decrypt only 8bytes block at a time. Thus takes a lot of time during encryption/decryption.

Please tell, if there is any other way/function that can take larger block size, or any other function which implements DES in a faster manner.

Pawan
Feb 23 '07 #1
1 2402
DeMan
1,806 Top Contributor
I suspect bigger key will give you bigger block, but they should be multiples of 8 bytes (i think)
Feb 23 '07 #2

Sign in to post your reply or Sign up for a free account.

Similar topics

1
2424
by: D. Alvarado | last post by:
On my Fedora Core 2 Linux dev box, I have installed mcrypt and compiled PHP with the --with-mcrypt option. I am concerned that when I move to another hosting enviornment mcrypt will not be supported. In people's experiences, have hosting companies supporting PHP/MySQL generally provided support for mcrypt? Does anyone recommend another module for encryption/decryption that accompanies the PHP package? Thanks, - Dave
1
2472
by: Jase H | last post by:
Hello, I have a ASP.NET web application problem involving the data encryption and decryption assembly(DLL) used on the connection string value that is set in the webconfig file. The problem occurs in the application when you instantiate a new instance of the class as shown below: ---Dim dp As DPAPIComp.DataProtectorComp = New DPAPIComp.DataProtectorComp--- where DPAPIComp is the name of the namespace referenced to in the library
2
4197
by: Dave Bailey | last post by:
I have developed a web app using DPAPI to encrypt a connection string in the web.config file. The application works perfectly on the development machine but when deployed to the server when opening the app the following wrror is generated: Exception decrypting. Decryption failed. Key not valid for use in specified state. Description: An unhandled exception occurred during the execution of the current web request. Please review the
2
2585
by: sushant.bhatia | last post by:
Hi All. I'm using the NCrypto dll for RSA Encryption/Decryption (http://sourceforge.net/projects/ncrypto/). My encryption code in .Net is pretty simple. The dataToEncrypt length is 1024. The returned data is 1161 in length. public static byte EncryptRSA(string certFilePublic, byte dataToEncrypt) { RSAParameters rsaParams = GetRSAPubKey(certFilePublic);
2
7151
by: almurph | last post by:
Hi everyone, Can you help me please? I am having a problem with the encryption/decryption of words with the Irish fada in them. The Irish fada is like this: áéíóú/ÁÉÍÓÚ. It's kind of like the French grave... Anyway when I run encryption on a plaintext word like:
4
5705
by: Fritjolf | last post by:
Hi. I've got a strange problem... I've made a simple program to test encryption/decryption. I use Rijndael encryption and here are the most important properties. RijndaelManaged cipher = new RijndaelManaged(); cipher.KeySize = 256; cipher.BlockSize = 256;
5
9530
by: Netwatcher | last post by:
well, i started messing around with dictionaries, yet, most of the pages i found about them always talk about getting only one word out of it and turning it vice versa, i've been playing with that code for a few hours: #dics Encryption={',':'hy{;',' ':'h4x0r2','':'zomg','?':'bko','a':'ika','b':'d0v','c':'ino', 'd':'maw', 'e':'aon', 'f':'que', 'g':'kip', 'h':'an', 'n':'ko print lol except KeyError: print 'These...
9
4817
by: Betikci Boris | last post by:
I get bored last night and wrote a script that uses xor for encrypt- decrypt, however it woks fine under linux 2.6.25, text and documents are ok, but fails on compressed files *.jpg, *.pdf , etc . I didn't test script on windows. Here is the code, please send me your views. <?php /* Mother Eye Chipper with PHP :), Licence:GPL,
9
2441
by: Alan M Dunsmuir | last post by:
In my (PHP-5) application I have to write some records to a table in my database, which I don't want even my clients using the system to be able to read. This is not a problem in National Security; I simply want the contents of records in this file to remain unreadable, even by the client's IT supervisor who can look at the contents of the (MySQL) database using phpMyAdmin. I intend, periodically, to download these records to my local...
0
9386
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
9998
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
9938
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
8822
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
7366
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
6642
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5406
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
3
3523
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
3
2793
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.