Is TLS an SSL certificate?

How is TLS different from SSL?

TLS and SSL are cryptographic protocols.

Although they are both described using the same terminology, they are different protocols in purpose and use. SSL was developed before TLS. It's main strength was the ability to authenticate a server on a client machine.

TLS has replaced the need for SSL and many web sites now support only TLS. TLS is a much more general purpose protocol than SSL. Its main strength is the ability to secure data over multiple network mediums and across the internet.

TLS uses asymmetric cryptography while SSL uses symmetric cryptography. TLS and SSL can be run over multiple network mediums. TLS can even provide connection security without any network connectivity (if done with DTLS, a version of TLS built to avoid latency).

Most web sites today use TLS but the number of secure web sites is still small. A large fraction of TLS-enabled web sites still have HTTPS but not TLS (HTTPS without TLS). Why does a web site like StackExchange use HTTPS? We had the choice to run HTTPS over SSL or over plain TCP connections. We chose to run it over HTTPS, though plain TCP would have been more secure (without compromising the web site), so that you would get the best of both worlds: SSL encryption and plain TCP communication. However, we chose to trust the remote server and thus allow it to access your private data (like email address). On some web sites, this may not be possible to do.

A Web browser's URL bar can indicate the version of TLS used. TLS 1.2 for example, is indicated as Some browsers indicate the version of TLS used in the URL in the lower left of the tab. When you type "https://" in the browser's address bar, the version of TLS used is shown.

It's important to understand that HTTPS means "Encrypted Sockets Layer". HTTPS is used when you want to encrypt a web connection in some way, whether you are on a local network or the internet. An encrypted connection from a client browser to a web server requires that the client browser have a valid certificate from a trusted server. This certificate acts like an encryption key which is used to decrypt the data traffic.

What Is An SSL/TLS Certificate?

What It Is Not!

Do you own an SSL/TLS certificate? If so, then congratulations! Your website is probably protected by a secure connection. If not, then we're sorry for that; but at least you can learn the basics about what it is.

This post uses the example of your personal computer and website which may or may not be protected by your certificate. But this applies to any site, server, program, or device which requires an SSL/TLS certificate.

Contents. How I Protect My Own Privacy. The Web is now so big and so complicated that people don't even realise it's a maze of secret pathways guarded by soldiers with submachine guns. But I know about this because I have eyes in my head. For my entire adult life I have lived among the ranks of the Secret Service, a division of the US Federal Government whose sole purpose is to protect me.

"Secret Service?" you say. "What do you mean, Secret Service?" Don't worry! This secret security service is just like any other service which might protect you. Your personal details would be kept a secret, your mail would be censored and screened, your voice recorded, your movements tracked, and anyone who entered your room would be required to answer questions for you.

You might ask me what else they could do to help keep me safe and out of trouble, but my job doesn't let me speak very much. What the Secret Service can do is keep me safe by keeping me busy - and keep me busy with all kinds of tasks, from keeping a tab on what TV shows I'm watching to following any person who I think may want to harm me.

A recent headline reported that a British citizen, Richard O'Dwyer, was convicted of distributing copyright-protected material over the web without authorisation, when, in fact, no such thing had ever happened. How was he convicted? That's a secret. Why would any company or person be worried that their details might be passed on to a journalist for publication by mistake or accident, or that a politician could be convicted by a corrupt legal system for something he didn't actually do? Yes! Those are Secret Service secrets, as are many others which you have not been granted access to.

For a lot of things, the whole point is keeping things secret. Forcing the Government to Tell The Truth!

How does an SSL/TLS certificate work?

An SSL/TLS certificate is used to identify an entity (eg a server) to. A client, or vice versa. To understand how this works, we need to understand the process of establishing a connection between two. Entities. The way SSL/TLS certificates work is that they are like identification cards for the entities. One side of the card contains information about the entity, such as its name, its email address, and. Its IP address, and the other side contains the secret key for the. Entity's public key certificate. The way this works is that the identification card and the secret key are kept private and the client. Is the only one who has access to them. Once the client sends a request, which is encrypted using the secret key, the client and the. Server agree on a symmetric session key, which is then used to. Decrypt and authenticate the response. Once this is done, the information on the card is revealed and any messages sent from the. Client to the server will be decrypted and authenticated using the. The idea behind SSL/TLS certificates is that they are like. Identification cards for the entities. One side contains address, and its IP address, and the other side contains the secret. Key for the entity's public key certificate. This secret key is kept private and the client is the only one who has access to it. Once the client sends a request, which is encrypted using the secret key, the. Client and the server agree on a symmetric session key, which is then. Used to decrypt and authenticate the response. Here is how this works: The SSL/TLS process works in a similar way to PGP, except that SSL/TLS. Certificates do not include an email address of the entity (in PGP. The entity's name is included). When the entity wants to send a message to another entity, the entity. First creates an encrypted version of the message, encrypts the. Message with the secret key, and sends the encrypted message to the