Timeline for What is a block cipher?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 27, 2013 at 9:00 | comment | added | Thomas | @Oleski Well, that only works if you are guaranteed your message never contains bytes with zeros, if that's not the case your padding will be ambiguous. See this link for more general ways to do it. | |
| Jan 26, 2013 at 22:29 | comment | added | Oleksi | Typically that block gets padded with '0' until it's the correct blocksize. | |
| Jan 26, 2013 at 20:17 | comment | added | almodawan | Thanks a lot MrOleksi. on this clarification is useful.Just have a simple question when the data size is less than 256-bit how to deal with it. | |
| Jan 26, 2013 at 19:51 | comment | added | Oleksi | Well the block size and the keysize can be different. The blocksize is always the same for a given algorithm. If you have 512 bits of data and your block size is 256, you will need to break up the data into two chunks for encryptio/decryption. | |
| Jan 26, 2013 at 17:52 | comment | added | almodawan | Thank you Mr Oleksi for your response. If I have data length of 512 bit and I have a 256-bit key length and encryption result rather (plain text) is 256 bit after decrypt process. I able to encrypt data has max length 256 bits. I can say that the length of block cipher is 256 bits. Because should be divide 512 bit to two chunk Each chunk has 256 bits. If that is true I am hope. please response me. | |
| Jan 26, 2013 at 17:50 | review | First posts | |||
| Jan 27, 2013 at 9:01 | |||||
| Jan 26, 2013 at 17:30 | history | answered | Oleksi | CC BY-SA 3.0 |