Cloudflare, CIRCL and Blinded RSA Signatures
There are few things better than a new album released by your favouriate band, and for a cryptographer, it’s great when some new cryptographic functions are released within one of your favouriate crypto libraries. And, so, the Cloudflare CIRCL library is one of my favouriates, especially as it is so well matched to the future (and one that respects privacy and fully integrates trust). Within there you will find PQC (Post Quantum Cryptography) and Zero Knowledge Proof (ZKP) methods:
https://asecuritysite.com/circl
In CIRCL v1.3.0 we see four new functions: CPABE (Ciphertext-policy Attribute-Based Encryption), Blind RSA Signatures, Schnorr ZKP and DLEQ ZKP:
We also say a long-term goodbye to SIDH/SIKE (as it was recently cracked in the final round of the NIST PQC competition). I have covered the new Schnorr and DLEQ implementations here:
https://asecuritysite.com/circl/circl_sch
https://asecuritysite.com/circl/circl_dl
And, so, in this article, I will implement RSA Blinded signatures.
