github.com
tested 6 years ago

Certificate Overview

Valid Host NamesMatchedgithub.com
www.github.com
Expiresin 5 monthsValid after May 27, 2011
TrustTrustedThe certificate was issued by DigiCert High Assurance EV CA-1

 

Security

Encryption CiphersOK
Public Key Size2048 bitsKey sizes 1024 bits or larger are considered secure. Be aware that unnecessarily large key sizes will slow down the connection establishment.
Secure RenegotiationYes
ProtocolsOKSSLv3, TLSv1

 

Performance

HTTP KeepaliveYes
SSL Session CacheNoSSL Session caching allows faster re-establishment of a cached SSL session, improving user experience
TLS Stateless ResumeNoTLS stateless resume allows for faster re-connections to TLS enabled servers, without needing session state to be stored on the server.
SSL Handshake Size4436 bytesThe amount of data exchanged to establish a session with this server is large. This will result in a slower initial connection.

Using a certificate with fewer intermediate chains and / or a smaller public key size can reduce the amount of data.

 

Encryption Ciphers (TLS/SSLv3)

CipherStrengthAlgoKeyKeyExHandshake
RC4-SHAMediumRC4128-bitRSA118ms4284 bytes
AES128-SHAHighAES128-bitRSA120ms4308 bytes
DHE-RSA-AES128-SHAHighAES128-bitDH169ms4710 bytes
DES-CBC3-SHAHigh3DES168-bitRSA118ms4292 bytes
EDH-RSA-DES-CBC3-SHAHigh3DES168-bitDH173ms4694 bytes
AES256-SHAHighAES256-bitRSA122ms4308 bytes
DHE-RSA-AES256-SHAHighAES256-bitDH173ms4710 bytes