What is KCV (Key Check Value) in the context of 3-DES Encryption? Is there good documentation on what is KCV and how it can be used in 3-DES Encryption?
For a Key Check Value (KCV) one generally uses single block encryption, without any mode such as ECB or CBC. As only a constant value of 16 bytes is used, there is no need for padding either.
I have a 128bit double length 3DES key and am trying to verify its KCV using OpenSSL on the command line but am not sure how to put together the command.
Anyone know how to calculate check value (KCV) for a 3DES key? Example the Check Value for key DBFE96D0A5F09D24 is 5B4C8BED I saw sample for C# but not Java.
To calculate a KCV for an AES key you encrypt an empty (0x00) block with the key and the first 3 bytes of the resulting encrypted block is then the KCV. Take a look here
I'm having a problem with generating a KCV for a DES key in C#.NET In reference to this answer, the KCV for the DES key "0123456789ABCDEF" is "D5D44F" (as only the first 3 bytes are considered) an...
This outputs D5D44FF720683D0D as expected (KCV for key 0123456789ABCDEF is D5D44FF720683D0D). EDIT: In your case you need to append the first 16 characters to the end of the key to get the correct KCV:
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