* Add entries about ECDSA leakage
The ECDSA is fragile: even small leakages in nonce can help
recovering the private key. The leakage could be a result of a
faulty RNG or timing leak. The most unfortunate part is that this
fact is generally unknown. Therefore, I think this is a valuable
addition.
* Fix link with garykessler.net
Replace it with web archive.
Co-authored-by: Pavlo Farb <pavlo@cossacklabs.com>
* Add action for checking links every sunday
* Add workflow that check link on every PR
* Replace link to Post-quantum with web-archive
It is actually working, but it doens't allow automatic tools like
lychee, returning 403.
Som replace this link with the web-archive.
* Replace links that don't respons with web.archive
* Replace badge link
The old gave a TLS error for some reason.
Update broken links for the following resources:
* Proofs of Knowledge
* How to Prove a Theorem So No One Else Can Claim It
* Knowledge Complexity of Interactive Proof Systems
* Zero Knowledge Protocols and Small Systems
* Handbook of Applied Cryptography
[id0-rsa crypto challenges](https://id0-rsa.pub/) is a good web for both start learning cryptography throught examples and strengthen knowledge. It covers from Caesar to AES in symetric encryption, the basis of the RSA cryptography, pseudo random number generation, hashing... And after a problem is solved, you can read other users writeups.
Nazar Serhiichuk