Security weakness : Forward Secrecy
Lavoisier server does not support Forward Secrecy with the reference browsers .
Forward secrecy (FS) also known as perfect forward secrecy (PFS), is a property of secure communication protocols in which compromises of long-term keys does not compromise past session keys. Forward secrecy protects past sessions against future compromises of private key. The very popular RSA key exchange doesn’t provide forward secrecy. You need to support and prefer ECDHE suites in order to enable forward secrecy with modern web browsers.