Posts
Chunking attacks on Tarsnap (and others)
Breaking and Fixing Content-Defined Chunking
What do you think of my protocol design?
I'm a developer, working in cryptocurrency space. I came across an NFC-based wallet ([Burner](https://burner.pro/)), and thought it would be fun to make a similar concept for my business cards. My version will only connect to the testnet with worthless assets, so it doesn't actually matter, but I still want to …
Crypto Forum Research Group (CFRG) Process
In TLS 1.3, is the server allowed to send an early_data extension in a session ticket if the client hasn't offered early_data in that handshake's Client Hello?
I had a look at RFC 8446 and couldn't find anything either way. The old draft RFC 8446 was explicit that this is not allowed. Was this removed to leave it open to implementations, or because it is implied forbidden because clients must signal support for extensions first? Usually server …
The IACR conference Crypto 2025 has been updated a notice about remote participation options, due to being hosted in USA
Cloudflare blog; Prepping for post-quantum: a beginner's guide to lattice cryptography
How does 0-RTT TLS 1.3 determine whether to accept or reject early data?
In a 0-RTT TLS 1.3 handshake, ClientHello can indicate whether at least one early data application record is sent, but not how many. ClientHandshakeFinished indicates the client has finished sending early application data records. ClientHandshakeFinished contains the hash of ServerHandshakeFinished. EncryptedExtensions is ordered before ServerHandshakeFinished. The server indicates in EncryptedExtensions …
How to Hold KEMs
Looking for Xipki's ipkcs11wrapper/jpkcs11wrapper libraries
Hello everyone. I was using the **ipkcs11wrapper** and **jpkcs11wrapper** libraries from Xipki. They were available at [https://github.com/xipki/xipki](https://github.com/xipki/xipki), but at some point, the owner removed them, and I haven't seen any updates since. Does anyone have access to the source code or could provide it so I can make some adjustments? …