30
votes
3answers
3k views

Is HTTPS URL in plain text at first connection? [duplicate]

Let’s say I have never connected to the site example.com. If this site is https and I write https://example.com/supersecretpage will the URL be sent in clear text since it's the first time I connect ...
13
votes
1answer
17k views

SSL Certificate framework 101: How does the browser actually verify the validity of a given server certificate? [duplicate]

Sorry I know this is a complete noob question and at the risk of posting a somewhat duplicate topic. I have a basic understanding of public/private key, hashing, digital signature... I have been ...
5
votes
2answers
1k views

In a browser web server communication, who decides which encryption protocol to use [duplicate]

My IE browser has SSLv3.0, TLS 1.0,1.1 and 1.2 enabled in the advanced settings. And (I was informed by my server admin) my web server can encrypt data in SSLv3.0 and TLS 1.0 Now which system (...
5
votes
1answer
2k views

In SSL server handshake, does server also send CA certificate [duplicate]

In the TCP SSL sever handshake, does the server also send CA certificates? Does the server need to send all intermediate CA certificates in the Server Hello?
7
votes
1answer
9k views

What's the point of the pre-master key? [duplicate]

In SSL, the client generates a pre-master key from random data from itself and also the server. It then encrypts this with the server's public key, sends it to the server and then both client and ...
-2
votes
2answers
14k views

SSL protocol : Port 443 [duplicate]

I want to usethe SSL protocol. SSL protocol uses port no. 443. During the initial handshake does the communication occurs on port no. 80 or it handshake starts on port 443. If not during the initial ...
8
votes
2answers
772 views

Question About HTTPS Security [duplicate]

I recently read about how HTTPS work and I have some questions to clarify. Pardon me if this sounds silly but I just need to get this clear. Correct me if I am wrong. I got to know that as part of ...
4
votes
2answers
2k views

How do session keys in public key cryptography work? [duplicate]

I have read that a session key is symmetric, and it is encrypted by recipient's public key; When "Bob" receives a message, does he decrypt it with his private key and he's then in possession of an ...
4
votes
3answers
599 views

How to fix SSL algorithm for more security [duplicate]

SSL uses Asymmetric Encryption like this : Server sends a copy of its asymmetric public key. Browser creates a symmetric session key and encrypts it with the server’s asymmetric public key. Server ...
2
votes
4answers
198 views

How could online encryption ever work? [duplicate]

I have recently read about the german enigma machine in WW2, It worked in a way that every day the machine configuration was sent per mail to the different operators. (I couldn't find official sources ...
0
votes
2answers
790 views

Is HTTPS based on a private key on the user side? [duplicate]

Is HTTPS it based on private key on user side? Where does the user get the private key in the first place? Suppose the user gets the private key by downloading a browser (Chrome, Firefox), then isn'...
2
votes
3answers
313 views

Does HTTPS allow replay attack on authentication request? [duplicate]

If I sent a username and the password to a website over HTTPS, is it possible that someone on the net would save this request and re-send it later to authenticate on the website?
2
votes
2answers
224 views

How can a connection be secure, if somebody observes it from the beginning? [duplicate]

If somebody observes a connention between client, and the server, then he can see the keys, by the following data encrypted is. As far as I know, if I connect to a server, then it sends me some keys, ...
0
votes
1answer
1k views

How does ssl prevent MITM attacks [duplicate]

My understanding of how it works : A victim asks for the public key of a server. The attacker just forwards this request. The server now responds with a certificate which contains the Public key. The ...
0
votes
2answers
151 views

Understanding SSL certificates [duplicate]

How does an SSL certificate prove the emitter is who he pretends to be ? If Bob (holding a certificate) and Alice wanted to establish a SSL-secured connection, wouldn't John be able to get the ...

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