The post linked above explains that in detail, but this is the exact section: https://paragonie.com/blog/2016/12/everything-you-know-about-public-key-encryption

The post linked above explains that in detail, but this is the exact section: https://paragonie.com/blog/2016/12/everything-you-know-about-public-key-encryption-in-php-is-wrong#rsa-ecb https://paragonie.com/blog/2016/12/everything-you-know-about... You mostly see this in amateur Java apps but badly written PHP that tries to use RSA makes the same mistake.