Configuration Medium Certificates can be forged by capable adversaries. Forged certificates can be used in MITM attacks against connecting clients. Renew certificates with SHA-256 signatures. This should be done before 2016. Vega detected a certificate signed using SHA-1. SHA-1 is a hash algorithm used in digital signatures. It is currently considered deprecated due to the increasing feasibility in breaking it. SHA-1 (Wikipedia) HTTPS (Wikipedia)