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I've been looking for a SHA1 routine for an Access 2010 project. A Google search turns up quite a few for Visual Basic but not for current level vba.

This needs to be implemented entirely in Access vba - I'm trying not to call an external program (I can do it now with REST if I have to).

Can anyone point me to a source?

Thanks

hi,
i've full disk/system encrypted my linux xubuntu through native encryption setup when installing. i'd now like to add to this an outer volume, making my current one hidden. i'd also like to boot the less-hidden volume run XP.

is this possible without wiping the entire harddrive again? the standard option in truecrypt seems to be to create a fresh outer volume first (ie. the not-secure) and put the 2nd inside it (the one i...

So has the title says I need to find a away to loop over a Character ArrayList and replace the characters with a values from a HasMap.


This is a simple encryption but I can't figure it out. What I have to do is get the distinct characters from the text that's been passed in and then assign values to them using a HashMap. I've done that. Also in front of the file there should be the number of distinct characters and the distinct...

I am getting the following error:
##this is the error message i receive

Traceback (most recent call last):
File "C:\Users\a\Des ktop\checkerboa rd", line 26, in <module>
print(checkerbo ard(plaintext))
File "C:\Users\a\Des ktop\checkerboa rd", line 20, in checkerboard
ciphertext=ciph ertext+idx
TypeError: Can't convert 'int' object to str implicitly

I am...

Introduction
The Advanced Encryption Standard is the algorithm that won the National Insitute of Standards and Technology's (NIST) search for a standardized encryption algorithm in 2001. In 2002, it was adopted by the U.S. government as a stadard for encryption. It is based on the Rijndael algorithm.

Even though it was chosen by NIST, it was not the strongest algorithm that was available. Both the Twofish and Serpent algorithms...

09/22/2015 Update: A bug was found in the code. The code block has been updated with the fixed code.

Description
RC4 is one of the most widely used ciphers in the world. It is used in WEP, WPA, SSL, BitTorrent, PDF, etc. It is one of the simplest to understand and implement. It is also one of the fastest algorithms available.

What is RC4
It is a stream cipher, which means that it encrypts a stream of data byte...

Description
RC4 is one of the most widely used ciphers in the world. It is used in WEP, WPA, SSL, BitTorrent, PDF, etc. It is one of the simplest to understand and implement. It is also one of the fastest algorithms available.

What is RC4
It is a stream cipher, which means that it encrypts a stream of data byte by byte as opposed to a block cipher that encrypts groups of bytes at a time, usually with the inclusion of...

I have a webservice, when executed calls a Batch file (.bat). The batch file looks for certain files in a folder compresses it using 7z.exe and then it has to encrypt using the GPG.exe. However, It does the Compressing part but not the encryption ... any idea? is it coz of some permission issues? if so how come its doing the Compression part?

Thanks in advance

Roopesh

At the moment im working on an encryption program, just to prove something to myself. At the moment I have a problem, when I run the program it will drop a few characters and return wrong characters, here is the encrypter code.

[code=vbnet]
Dim x As Int64
Dim y As Int64
Dim z As Int64
Dim chrpos As Int64
Dim chrcode As Int64
Dim str As String...

Calculating Large Exponents

Background: This is a quick article as to how to calculate the exponents of large numbers quickly and efficiently.
Starting with a basic multiplication algorithm, it gives subsequently faster algorithms and a few quick examples.
The techniques used in this article can be used in general mathematics, encryption, among other things.

In this article, the following conventions...

I am trying to write a protection procedure, which will allow me to create a licence key for our users. This licence key will ensure that the software can only run on the registered system, and will allow the user to access only specific areas of my program which is relevant to them.

I am thinking of using an RSA style approach to this where I want to be the only person who can create the registration keys. But I want to allow the program...

Hi Forum,

I have asked questions about this before but my program has came to cross roads where I require more flexibility in my security procedures.

At the moment I generate a specific key based on certain details about the system, and I hash this data to file, which ensures it will only run on this system.

However it has now got to the point where I have a need for providing keys which will carry settings...

Hello,

I'm trying to make a simple Caesar cipher however instead of A-Z i want to also include 0-9. where 9 wraps back to A.

The best i could can do shift letters and integers independently so a string like "TESTING SHIFT Z 9" with a key of 1
becomes
"UFTUJOH TIJGU A 0"

9 wraps to 0 and Z wraps to A

here is how I did that:

...

I am encrypting the data with blowfish CBC mode in C using openssl.
I am trying to decrypt the data with the key using PHP mycrypt.But it does not give me the actual data but some garbage text.I am able to decrypt and encrypt with mcrypt but if i encrypt with c i am unable to decrypt with PHP.

This is driving me insane. Ive checked every sample and cant see anything happening differently. I'm sending the file over a network so the key and IV bytes are sent with the file to be used to decrypt, but every time it goes to decrypt i get "Padding is invalid and cannot be removed." Please give me at least a clue someone.

Edit : I know I posted this under the wrong language, my bad. Its c# not c

here's my code:...