Consider libsodium / sodium_compat for modern public-key crypto

[paragonie-scott]

https://github.com/paragonie/sodium_compat#cryptography-primitives-provided

Zend\Crypt users interested in modern ECC may want to see sodium_compat adopted in the near future. In particular, public-key encryption via ParagonIE_Sodium_Compat::crypto_box_seal() and digital signatures via ParagonIE_Sodium_Compat::crypto_sign_detached().

I would, however, wait until sodium_compat has been audited first: paragonie/sodium_compat#8

[paragonie-scott]

v1.0.1 is out, the notes from v1.0.0 are a must read before weighing whether or not to use it.

[weierophinney]

This repository has been closed and moved to laminas/laminas-crypt; a new issue has been opened at laminas/laminas-crypt#4.