Standards The current approved version is NUMBER@1 , which is specified in : RFC NUMBER@2 : `` The Transport Layer Security -LRB- TLS -RRB- Protocol Version NUMBER@1 '' .

The current standard obsoletes these former versions : RFC NUMBER@3 : `` The TLS Protocol Version NUMBER@4 '' . RFC NUMBER@5 : `` The Transport Layer Security -LRB- TLS -RRB- Protocol Version NUMBER@6 '' .
