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RSP Encrypt OCX 3.4.2
ActiveX OCX to encrypt files and strings with a very fast
implementation of AES 256 bits and standard RC4
What is new in the version 3.4.2
Recompiled with gcc 11.3.0, a few modifications,
no changes in the code
What is new in the version 3.4.1
(Thu Sep 10 13:35:56 2009)
Small update to reflect the changes
What is new in the version 3.4.0 (Fri Jun 06 09:32:00 2008) :
Fixed incompatibility with Windows Vista , minor modifications
What is new in the version 3.3.0 (Mon Aug 08 14:30:57 2005) :
Fixed incompatibility with Win XP SP2 , minor bugs fixed
What is new in the version 3.2.0 (06/Jan/2005 15:59) :
Added a new mode of AES encryption called CTR mode , in
this mode the original block cipher is converted to a
stream cipher , then , no more padding required when
the string or file is not multiple of 16 , and this
new mode also will make the output data to be
indistinguishable from random noise no matter what
kind of input is sent to the encryption code , the
speed execution is slightly slower than the normal
AES mode , and this is the mode of choice for
maximum security , notice that both old mode and new
modes are available in the control , minor modifications
also
What is new in the version 3.1.0 (05/Jan/2005 16:26) :
Added full support to multiples instances of the
control in the same form using normal method or
CreateObject , modified the termination of the
control to avoid possible VB crashes , enhanced
the speed execution of the encryption/decryption ,
now the control is 10 percent faster when encrypting
RC4 files and 40 percent faster when encrypting
AES 256 files , minor bugs fixed
What is new in the version 3.0.0 (26/Aug/2004 10:55) :
Added CRC data detection on the encrypted file , now
the control can check whether the correct password was
entered , added new functions to avoid the break of
compatibility with older versions , then the control
can work in old mode or in the new mode in the same
environment , the new functions are NewEncryptFileAES ,
NewDecryptFileAES , NewEncryptFileRC4 and NewDecryptFileRC4
, added detection of valid encrypted files , now the
control will detect whether a file passed to the encryption
functions are encrypted or not before unencrypting ,
notice that it only aplies to the new functions added
, when using the old functions the new mode is just
deactivated , minor bugs fixed
What is new in the version 2.5.0 (01/Mar/2004 18:38) :
Added string encryption code , added Unicode support to
encryption of strings , fixed a bug that may occur
when very large passwords are passed to the control , in
this case the control can just crash due to memory
corruption on the stack , added string size verification
code to both files and strings encryption , minor bugs fixed
What is new in the version 2.0.0 (16/Feb/2004 20:52) :
Added cpu detection code , added pause , resume and cancel
functions , extended the execution to make the encryption
and decryption functions to return immediately while the
execution is executing in the background , added progress
event function , added wait mode execution to make the
functions to return only after the end of the execution , added
process priority selection , minor bugs fixed
Features
This control can encrypt files or strings using
AES 256 or RC4 encryption method
The code is optimized to very fast code execution
on Win32 when new AMD or Intel processors are available
Ability to pause , resume and cancel the encryption of files
Progress event to report the progress of the execution
In the case of encryption of strings , the string
will be converted to hexadecimal notation since the
encrypted string is binary information that can have
characters that cannot be shown in textboxes
This conversion will cause the size of the string
to double , and when Unicode is used , the size will
be 4 times the size of the original string
This occur because in Unicode support method each
character is stored as a 16 bits value , and with
the hexadecimal conversion the size of the original
string will be four times the size of the original
string
Unicode support is important to make it possible to
show any character set available today , including
chinese and others characters sets that has simbols
instead of ANSI character codes
Description of the encryption methods
The AES ( Advanced Encryption Standard ) is adopted by
NIST as an encryption standard to be used when very strong
encryption is required
The RC4 is the standard RC4 encryption developed by
RSA , the control has optimized code for new AMD Athlon
and Intel P4 processors
The Advanced Encryption Standard (AES) specifies a
FIPS-approved cryptographic algorithm that can be
used to protect electronic data.
The AES algorithm is a symmetric block cipher that can
encrypt (encipher) and decrypt (decipher) information.
Encryption converts data to an unintelligible form called
ciphertext; decrypting the ciphertext converts the data
back into its original form, called plaintext.
The AES algorithm is capable of using cryptographic keys
of 128, 192, and 256 bits to encrypt and decrypt data in
blocks of 128 bits.
Notice that this control implements the 256 bit version
of the AES encryption
And notice also that to avoid the padding of the files
or strings that are not multiples of 16 bytes , the slice of the
file or string that are different of a multiple of 16 is encrypted
with RC4 , so , the destination file or string will always be the
size of the original file , in case of problems we
can generate this control using the standard padding
method using an additional header in the destination
encrypted file or string
Documentation
Documentation is available online in the homepage
Install
- Execute register_ocx.exe , if Vista then as admin
UnInstall
- Execute unregister_ocx.exe , if Vista then as admin
Homepage of the control
http://rspencocx.sourceforge.net
Email
arab@rspsoftware.com.br
Phone
#55 41 96802731
Còrka says thanks for using our software
RSP Software 2009
