Cryptography Reminder: These valuable security resources are available for the last 48 hours |
- Reminder: These valuable security resources are available for the last 48 hours
- How what's app is able to restore chats from encrypted local chat backup on a new device?
- Is there an encryption algorithm that is not (or very little) vulnerable to size correlation attacks?
- Is it really that important for ciphertext to be indistinguishable from randomness?
| Reminder: These valuable security resources are available for the last 48 hours Posted: 08 Dec 2018 10:30 AM PST |
| How what's app is able to restore chats from encrypted local chat backup on a new device? Posted: 08 Dec 2018 11:58 PM PST Everyday at 2am what's app creates a local encrypted chat backup If a user wants to move his account to a new device he can take that chat backup along with him and restore chats from it. Where does the new device get key to decipher the chat backup? [link] [comments]  |
| Posted: 08 Dec 2018 03:55 PM PST I have some ideas of my own as well. For example, 3 GB file would be increased to 3.27 GB, and for some other key, it would be 3.13 GB. (This wastes a lot of space tho) Or we could have, for example, 10 files of various sizes that got split into chunks of various sizes and there was an encrypted master file that holds info about which chunks belong to certain files. More files we have - the better. Is there an existing method of achieving immunity to this kind of attack? [link] [comments]  |
| Is it really that important for ciphertext to be indistinguishable from randomness? Posted: 08 Dec 2018 03:41 PM PST My algo can encrypt the data in a way that output looks random but fails on multiple dieharder tests. In simple terms, the key can be any size and the data is encrypted in such a way that after every chunk of 256 bytes, the key is encrypted by itself and the process continues. After all of this scrambling my algo still fails on the randomness tests, should I be worried? I can't share the code ATM, it's a real mess. Just asking to find out how bad this is. [link] [comments]  |
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