Implementation of Data Encryption Standard (DES) V1
Submitted By:
meetsugan
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The program implements DES – Data Encryption Standard to encrypt and decrypt plain-text files by generating a 64 bit key from the user’s password and encrypts the file taking 64-bit blocks at a time and performs 16 rounds of encryption on each block. The program can also be extended to implement Triple DES.
It was developed in Visual Basic 6.0...
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Languages:
Basic, Visual Basic
Number of downloads:
1352
Comments (4)
rating the source
Posted by: johannes tampubolon on Monday, August 21, 2006
good, very-very good resource. thanks. i had used the resource to my tesis and it was succes. if you dont mind can i have more explanation about how to create a program DES in visual basic.
Good work but minor bug?
Posted by: Dave on Tuesday, September 26, 2006
Thank-you for the source it was very helpful. One thing to note is that I believe there is a bug in the generate_sub_keys() routine. "input_key = c_block & d_block" needs to be added before running permuted_choice_2. (without this line the output is encrypted although it is not standard DES)
Good work but minor bug?
Posted by: Dave on Tuesday, September 26, 2006
Thank-you for the source it was very helpful. One thing to note is that I believe there is a bug in the generate_sub_keys() routine. "input_key = c_block & d_block" needs to be added before running permuted_choice_2. (without this line the output is encrypted although it is not standard DES)
Will check it out...
Posted by: Saravanan Krishnaraj on Saturday, November 25, 2006
Thnx for the detailed analysis... i will check out that error soon...
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