Received: from mail-oi0-f47.google.com (mail-oi0-f47.google.com [209.85.218.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) A oneliner to check how many connections with wich cyphers are made.
The reason for A- is very simple: The Server does NOT use Forward Secrecy, because the TLS_RSA_WITH_*-Ciphers are preferred (if others are in use).To get A you Need to prefer Ciphers with TLS_ECDHE_RSA_WITH_* or TLS_DHE_RSA_WITH_* (or TLS_ECDHE_ECDSA_WITH_* if a ECDSA-Certificate is used, but the Server use defiantly a RSA-Certificate)Why these Ciphersuits are now label … How does RSA 256 work with AES 256? - Quora RSA is Asymmetric public/private key encryption algorithm this means that you don’t need to share a secret key between the other communicating party but the problem is it is slow so you can’t use it with long messages , AES on the other hand is a JSON Web Token (JWT) with RSA encryption | Connect2id
Postfix and TLS encryption - Dennis Kruyt
Python-RSA is a pure-Python RSA implementation. It supports encryption and decryption, signing and verifying signatures, and key generation according to PKCS#1 version 1.5. It can be used as a Python library as well as on the commandline. The code was mostly written by Sybren A. Stüvel. Documentation can be found at the Python-RSA homepage. RSA Algorithm With C# - C# Corner Sep 17, 2019 RFC 5702 - Use of SHA-2 Algorithms with RSA in DNSKEY and
Mar 13, 2019
SSL - ECC 256 bit vs RSA 2048 bit SSL | Centmin Mod May 26, 2016 TLS_RSA_WITH_AES_256_CBC_SHA comes to be weak cipher? The reason for A- is very simple: The Server does NOT use Forward Secrecy, because the TLS_RSA_WITH_*-Ciphers are preferred (if others are in use).To get A you Need to prefer Ciphers with TLS_ECDHE_RSA_WITH_* or TLS_DHE_RSA_WITH_* (or TLS_ECDHE_ECDSA_WITH_* if a ECDSA-Certificate is used, but the Server use defiantly a RSA-Certificate)Why these Ciphersuits are now label … How does RSA 256 work with AES 256? - Quora