日刊IETF (2026-01-26)【PQC実装の本格化】JOSE/COSE対応とIoT環境への適用が加速
https://qiita.com/tetsuko_room/items/a23ff5effdeb41b714fc?utm_campaign=popular_items&utm_medium=feed&utm_source=popular_items
日刊IETF (2026-01-26)【PQC実装の本格化】JOSE/COSE対応とIoT環境への適用が加速
https://qiita.com/tetsuko_room/items/a23ff5effdeb41b714fc?utm_campaign=popular_items&utm_medium=feed&utm_source=popular_items

Oggi, dopo la pausa natalizia, riparte da Ferrara il viaggio di Mensaleri, che in inverno toccherà Tarquinia, Viterbo, Roma, Jesi, Fano, Bologna, Bolzano, Altamura, Lecce, Salve, Taranto, Fabriano, Barberino del Mugello, Torino, Napoli, Pozzuoli, Santarcangelo di Romagna e Gambettola. Fino a febbraio, le date sono nel nostro calendario generale. Le altre le trovate in quello […]
Notre #alerte #météo 🟠est maintenue pour des intempéries au sud-est, surtout en #Cose dès cette nuit avec des pluies torrentielles et de fortes vagues. Attention à la #neige sur les #Alpes ❄️👇https://actualite.lachainemeteo.com/alerte-meteo/8425-fortes-pluies-orageuses-au-sud-est-vent-violent-et-avalanches
🐦🔗 https://twitter.com/lachainemeteo/status/1912514657799065601
🕐 16/04 16:33
It's been on my mind I wanted to get to understand a few things…
1. #COSE : #CBOR Object Signing and Encryption
2. #X25519KeyExchange
There are a few applications I have in mind for this and I could find no good examples. So, I sat down and nutted out this:
https://gist.github.com/sjlongland/fc2e06cb47543e977440b79d6cf71185
This is a simple demonstration of X25519 and COSE in #Python. The idea being that this allows two peers to mutually authenticate, then establish a shared secret.
I'm still not 100% certain of some X25519 key exchange details, specifically why pycryptography's example does it twice?
https://cryptography.io/en/latest/hazmat/primitives/asymmetric/x25519/#exchange-algorithm
Note: they generate `derived_key`, but never use it. It'd make sense if it were part of the second call to `HKDF` or something, but the result is simply thrown away. Anyone know why that is?
Anyway, maybe the #cryptography gurus might have some ideas, and whether my little toy here actually would work for decent secure comms, or if there's a gaping hole I should look out for.