Linked Questions

32
votes
3answers
6k 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 ...
20
votes
5answers
6k views

Can a phishing website use the original (HTTPS, TLS) certificate? [duplicate]

If one has a phishing website that uses the original certificate that was obtained by accessing that website, can an attack fool users to believe they are accessing legitimate websites? If not, how ...
14
votes
2answers
4k views

Why does SSL use both asymmetric cryptography and symmetric cryptography algorithms together? [duplicate]

SSL uses both asymmetric cryptography and symmetric cryptography. Why can't it, or why doesn't it, just use one of them?
14
votes
1answer
16k 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?
6
votes
2answers
2k 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 (...
12
votes
1answer
17k 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 ...
-1
votes
2answers
38k 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 ...
3
votes
2answers
12k 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 ...
7
votes
3answers
10k views

How does the SSL connection protocol work with self-signed certificate? [duplicate]

I'm using the self-signed certificate, but I don't know how this protocol works. I connect two apps with a socket SSL and it works fine. The server is a Python app and the client is an Android app. I ...
2
votes
3answers
2k 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?
8
votes
2answers
842 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 ...
2
votes
1answer
5k views

Why is it not possible to fake a digital certificate? [duplicate]

When a client accesses an HTTPS webpage, (please correct me if I'm wrong), it just checks whether the certificate of that website has been signed by a trusted CA or not, but does not ask directly the ...
4
votes
3answers
674 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 ...
6
votes
2answers
1k views

Why are SSL handshakes secure and why can't a hacker look at that and decrypt the data? [duplicate]

If I understand right, there is a "handshake" where both the server and the browser verify who they are and agree on an encryption key. Why cannot a hacker just watch the network for the keys going ...
2
votes
4answers
288 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 ...

15 30 50 per page