RC2 key schedule

Posted by calccrypto on Stack Overflow See other posts from Stack Overflow or by calccrypto
Published on 2010-05-30T17:22:11Z Indexed on 2010/05/30 17:32 UTC
Read the original article Hit count: 349

Filed under:

cryptography

|

key

|

rc2

Can someone explain how the RC2 key schedule works (particularly the very beginning of it)? i know it uses little endian, but my implementation is not working for any key except "0000 0000 0000 0000"

Test Vector
Key = 88bc a90e 9087 5a
Plaintext = 0000 0000 0000 0000
Ciphertext = 6ccf 4308 974c 267f

im assuming that the first thing to do with the key would be to change it into

bc88 0ea9 8790 5a

and yes i know RC2 is not even used anymore, but i would still like to know

© Stack Overflow or respective owner

Related posts about cryptography

Visual Basic Cryptography Question

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to mimic the results of some C code that uses the OpenSSL library using the system.security.crytography library in the .net 3.5 world, and I can't seem to get it right. I need some help... part of the issue is my understanding of crytography in general. Here's what is supposed to happen: I… >>> More
External iPhone Cryptography Libs

as seen on Stack Overflow - Search for 'Stack Overflow'
Are there any legal problems using external crypto libs in my iPhone application? I know that Apple has to comply to US cryptography export rules but do I as a developer have any responsibility? How does it work? >>> More
MD5 implementation notes

as seen on Programmers - Search for 'Programmers'
While going through RFC1321, I came across the following paragraph: This step uses a 64-element table T[1 ... 64] constructed from the sine function. Let T[i] denote the i-th element of the table, which is equal to the integer part of 4294967296 times abs(sin(i)), where i is in radians… >>> More
What should web programmers know about cryptography?

as seen on Programmers - Search for 'Programmers'
Should programmers who build websites/web applications understand cryptography? I have no idea how most crypographic algorithms work, and I really don't understand the differences between md5/des/aes/etc. Have any of you found any need for an in-depth understanding of cryptography? I haven't needed… >>> More
Java Cryptography Extension

as seen on Programmers - Search for 'Programmers'
I was told that in order to support AES256 encryption inside my Java app that I would need the JCE with Unlimited Strength Jurisdiction Policy Files. I downloaded this from Oracle and unzipped it and I'm only seeing 2 JARs: local_policy.jar; and US_export_polic.jar I just want to confirm I'm… >>> More

Related posts about key

tmux: Suddenly, cannot horizontally split

as seen on Server Fault - Search for 'Server Fault'
As root, using a reasonably default .profile and .shrc and an empty tmux.conf, I am unable to split the window horizontally. There are a number of cases to consider so I'll list them clearly. Using the keybinding + empty configuration: nothing happens Using the keybinding + my configuration: a bell… >>> More
Foreign key reference to a two-column primary key

as seen on Stack Overflow - Search for 'Stack Overflow'
One of my tables has a two-column primary key: CREATE TABLE tournament ( state CHAR(2) NOT NULL, year INT NOT NULL, etc..., PRIMARY KEY(state, year) ); I want a reference to the tournament table from another table, but I want this reference to be nullable. Here's how I might do… >>> More
Numeric Data Entry in WPF

as seen on Stack Overflow - Search for 'Stack Overflow'
How are you handling the entry of numeric values in WPF applications? Without a NumericUpDown control, I've been using a TextBox and handling its PreviewKeyDown event with the code below, but it's pretty ugly. Has anyone found a more graceful way to get numeric data from the user without relying… >>> More
Elfsign Object Signing on Solaris

as seen on Oracle Blogs - Search for 'Oracle Blogs'
Elfsign Object Signing on Solaris Don't let this happen to you—use elfsign! Solaris elfsign(1) is a command that signs and verifies ELF format executables. That includes not just executable programs (such as ls or cp), but other ELF format files including libraries (such… >>> More
Force Quit - Short cut key on regular key - mac osx

as seen on Super User - Search for 'Super User'
Very confusing question here. I want to use the short cut key of force quit - in mac os x. It is written as follows. Command + Alt / Option + Reverse Q ( like key ). I am unable to use this short cut key. Any help please. Sagar >>> More