CRC32 Crypt.zip by Chuck Mire (Rate this file/View comments)

A symmetrical encryption program that uses CRC32 theory in which BOTH the user AND the file to be encrypted/decrypted create a unique streaming key that is never duplicated. Therefore, the sender and the receiver(s) can agree only once, if desired, to use the same setup over and over again for multiple file transmissions. The code is fully explained in the included HTML and the actual use with screen shots is shown in the included PDF. The zip file contains the Windows executable, the source code, the HTML and the PDF files.

Source included - QB64 - 827.5 KB - 772 downloads

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CRC32 Crypt.zip by Chuck Mire (Rate this file/View comments)

CRC32 Crypt, Version 2, has been updated with only one change: The encrypted file name(s) are now CASE SENSITIVE instead of always being UPPER CASE. Also, the explanatory html file has been updated and reworked. The zip file contains the new Windows executable, source code, and the explanatory html file.

Source included - QB64 - 386.2 KB - 723 downloads

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CRC32.zip by Chuck Mire (Rate this file/View comments)

CRC32.EXE calculates the CRC32 "check sum" of a file which will show if a file has been changed/damaged and/or incorrectly transmitted/received. It also has the unique ability to calculate the CRC32 value of a typed-in string within the program; and even the ability to then reverse the string for a new CRC32 value. This feature is useful when using my encryption programs ASYMETRY.EXE and 324&423.EXE. The explanation for how this can be done is fully explained in CRC32.PDF which is also included. For those who are interested in CRC32 math and theory, a duplicate historical document published on the web in 1993, CRCError.html, is also included - as well as CRCTABLE.EXE which is for those who are interested in further exploring the complexities of CRC32 theory.

Source included - QuickBASIC 7.1 - 314.39 KB - 1559 downloads

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CRC32.zip by Chuck Mire (Rate this file/View comments)

CRC32.exe and CRC Table.exe have now been ported to B64 Windows executables. CRC32.exe calculates the CRC32 "check sum" of a file which will show if a file has been changed/damaged and/or incorrectly transmitted/received. It also has the unique ability to calculate the CRC32 value of a typed-in string within the program; and even the ability to then reverse the string for a new CRC32 value. If you select the WinZip/PKZip Seed, CRC32 will compute the same CRC32 value for a file that DOS PKZip, WinZip, 7-Zip, and Windows Explorer calculates. You can also find the CRC32 value for a string as well as the CRC32 value for the same string with every byte reversed. CRC32 Table is a program that displays the complete CRC Table for a given Seed. Both programs can also be started with any custom Seed for totally different results. For those who are interested in CRC32 math and theory, a duplicate historical document published on the web in 1993, CRC Error Detection.html, is also included.

Source included - QB64 - 770.9 KB - 1819 downloads

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XOR Notes.zip by Chuck Mire (Rate this file/View comments)

This is further discussion on using XOR where an XOR encrypted file is sent to a receiver without exchanging keys. There is potentially a problem with this method resulting from a "Man-In-The-Middle", which is explained in full. A safer way to do this involves using my program CRC32.exe which is available here: http://www.qb45.org/files.php?action=showfile&id=1662 The attached zip file has an example I created for your review as well as a screen shot of the CRC32.exe entry that I document in an included XOR Notes.txt file.

Source included - QB64 - 28.21 KB - 755 downloads

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