Our Online Store have the new products: RFID antenna board. Currently it can work with JC10M24R and JCOP4 card chips.
Compared with normal cards, the antenna board module has a smaller size and fixed holes, which is easy to integrate in the IOT(Internet Of Things) project.

Is there any limit with the length of the data to cipher on 3DES

Algorithm School

Moderator: UNKNwYSHSA

wkuzma
Posts: 8
Joined: Wed Jan 20, 2016 10:50 pm
Points :145
Contact:

Is there any limit with the length of the data to cipher on 3DES

Post by wkuzma » Thu Mar 10, 2016 4:05 am

Recently, I have been trying to use 3DES to cipher data. Now I wanna know if there is any limit with the length of the data to cipher on 3DES. In fact, I am able to cipher data with length 8 bytes,16 bytes. For other length, I will get "6F00". Why? Is their any limit?

User avatar
UNKNwYSHSA
Posts: 630
Joined: Thu May 21, 2015 4:05 am
Points :3053
Contact:

Re: Is there any limit with the length of the data to cipher on 3DES

Post by UNKNwYSHSA » Tue Mar 15, 2016 2:44 am

The data block size of DES is 8 bytes.
So the length of your data shall be 8,16,24,32,n*8.
You can padding your input data when the data length is not 8 multiplied.
sense and simplicity

Post Reply Previous topicNext topic

Who is online

Users browsing this forum: No registered users and 27 guests

JavaCard OS : Disclaimer