Timeline for AES Cipher Block Chaining 128 bit message
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Oct 2, 2019 at 8:01 | history | edited | kelalaka | CC BY-SA 4.0 |
polish; Post Made Community Wiki
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| Oct 2, 2019 at 7:56 | comment | added | kelalaka | I've given a simple answer here. We need probabilistic encryption. You should use IV and in the CBC mode the IV must be unpredictable. | |
| Oct 2, 2019 at 7:54 | comment | added | user73367 | Can I still do CBC with an IV on just a single 128-bit message? (if so how), or do I need to pad it to 2 128-bit blocks like you said and then do the CBC calculations with an IV. | |
| Oct 2, 2019 at 7:53 | comment | added | kelalaka | Well, padding helps you to have always multiple of 128-bit and later, removing them. If you always 128-bit messages, you may have two options. pad or no pad. If you pad it will be 2 128-bit blocks. If you don't pad, it is just one block. | |
| Oct 2, 2019 at 7:50 | comment | added | user73367 | So if I have a message (128 bits) I need to apply padding to the message to obtain another plaintext-block? Which then allows me to perform CBC with those two blocks? | |
| Oct 2, 2019 at 7:42 | history | answered | kelalaka | CC BY-SA 4.0 |