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    This site can't provide a secure connection..... what to do ?

    Opera for Windows
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    • A Former User
      A Former User last edited by

      I frequently get the folowing message when trying to access sites (e.g. blservices.com and many others) :

      This site can鈥檛 provide a secure connection
      blservices.com uses an unsupported protocol.
      The client and server don't support a common SSL protocol version or cipher suite. This is likely to be caused when the server needs RC4, which is no longer considered secure.

      I use Windows XP and Opera 36. What to do? Is there a way to be reaching the sites without changing operating system?

      Thanks in advance for helpful suggestions.

      Reply Quote 0
        A Former User blackbird71 zalex108 3 Replies Last reply
      • A Former User
        A Former User @Guest last edited by

        @nityananda The site uses newer protocols that are not supported by your old version of Opera in order for support of the newer protocols you need 2 things

        1: Upgrade your OS ( windows 7, 8, 8.1 or 10)
        2: Upgrade to the latest version of Opera

        Problem solved stop flogging a dead horse in Win XP it's old and is no longer supported by either Microsoft or Opera

        Reply Quote 0
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        • blackbird71
          blackbird71 @Guest last edited by blackbird71

          @nityananda If you look at
          https://technet.microsoft.com/en-us/library/dd125380(v=ws.10).aspx you will find a table of key exchange protocols and integrity algorithms for various Windows operating systems (through Win7). When a secure website (https) presents a site certificate that calls out a particular key exchange scheme used to authenticate only that site and your system for encrypting data flow between them, if that exchange scheme isn't represented in the table for your OS, that means your OS cannot provide the ability to set up authenticated communications with the site in order to securely move data to/from the site... hence, the site won't work.

          The Bhaktivedanta site presents a certificate specifying a signature algorithm of sha256ECDSA, which implies a SHA256 integrity algorithm and an ECD (Elliptic Curve Diffie-Hellman) key exchange protocol. From the table, you will see that neither of these are available in Windows XP, hence they can't be used by browsers running on a WinXP system. This is true even if a browser itself could 'support' the particular signature algorithm capability, since browsers actually use the OS's encryption services. 'Elliptic curve encryption' of various kinds was developed in more recent years to increase the resistance of the encrypted data to machine code-cracking and compromise, and many websites are moving to one of its variants for better security.

          This is the unfortunate nature of obsolescence: it freezes something in time. Hence, later developments will often be incompatible with it, and the number of incompatibilities will only grow with the passage of time.

          Reply Quote 0
            A Former User 1 Reply Last reply
          • A Former User
            A Former User @blackbird71 last edited by

            @nityananda
            If you really can't upgrade from XP for any reason, I would recommend that you use Firefox 52ESR, at least for the problem sites.
            That still works on XP and should be supported at least until next summer.
            I've not seen it fail on any site yet because of a security problem.
            馃檪

            Reply Quote 0
              burnout426 1 Reply Last reply
            • zalex108
              zalex108 @Guest last edited by zalex108

              @nityananda

              If you can, consider to upgrade at least to Windows 7.


              Windows 10 (x64) | Anniversary Update
              Opera Stable 路 Beta 路 Developer

              Opera Test profile | Opera Back up Linux 路 Mac 路 Win

              "You cannot know the meaning of your life until you are connected to the power that created you". 路 Shri Mataji Nirmala Devi

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              • burnout426
                burnout426 Volunteer @Guest last edited by

                @davehawley said in This site can't provide a secure connection..... what to do ?:

                I would recommend that you use Firefox 52ESR, at least for the problem sites.
                That still works on XP and should be supported at least until next summer.

                And, since Firefox use its own network stack instead of the system's, there's a good chance it'll work. (Didn't know if you personally tested or not)

                Reply Quote 0
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