Linked Questions

1287 votes
3 answers

How does SSL/TLS work?

How does SSL work? I just realised we don't actually have a definitive answer here, and it's something worth covering. I'd like to see details in terms of: A high level description of the protocol. ...
Polynomial's user avatar
  • 135k
219 votes
7 answers

Does https prevent man in the middle attacks by proxy server?

There is a desktop client A connecting to website W in a https connection A --> W Somehow between A and W, there is a proxy G. A --> G --> W In this case, will G be able to get the ...
jojo's user avatar
  • 2,301
110 votes
6 answers

Why can't I MitM a Diffie-Hellman key exchange?

After reading the selected answer of "Diffie-Hellman Key Exchange" in plain English 5 times I can't, for the life of me, understand how it protects me from a MitM attack. Given the ...
orokusaki's user avatar
  • 1,362
77 votes
3 answers

symmetric encryption session keys in SSL/TLS

This question concerns the session send and receive keys used in SSL/TLS protocol. my understanding is that this key uses symmetric encryption (DES, AES, BlowFish, etc.) I'm wondering, if public-...
lurscher's user avatar
  • 1,240
70 votes
5 answers

Understanding 2048 bit SSL and 256 bit encryption

On DigiCert's page, they advertise a 2048 bit SSL with a 256 bit encryption: What exactly is the difference here and why are two encryption bits ...
JohnJ's user avatar
  • 867
65 votes
6 answers

SSL with GET and POST

I'm pretty new to security, so forgive my basic question, but does SSL encrypt POST requests but not GET requests? For instance, if I have two requests GET:
TomJ's user avatar
  • 753
32 votes
5 answers

SSH - If Eve has the passphrase and public key, can she derive the private key?

I have used ssh-keygen for creating an RSA 4096-bit SSH private and public key pair. I used a passphrase for the private key. If an attacker, Eve, knows the passphrase in addition to the public key: ...
unseen_rider's user avatar
28 votes
1 answer

My understanding of how HTTPS works (gmail for example)

I want to ask if my below understanding is correct or not regarding the HTTPS used for the webpage we are visiting. I will use Gmail as an example: My laptop tries to connect to the Gmail server ...
Xianlin's user avatar
  • 409
22 votes
5 answers

How can I explain the concept of public and private keys without technical jargon? [duplicate]

Possible Duplicate: Principle of asymmetric algorithm in plain english In the spirit of How can I explain SQL injection without technical jargon?, do you have any suggestions on how to explain ...
NickAldwin's user avatar
12 votes
3 answers

Preventing a spoofing man in the middle attack?

I was humming along with my usual routine of listening to old Defcon videos trying to understand some of the basics of what's going on in the IT Security world, when I came across one explaining man ...
Griffin Nowak's user avatar
7 votes
2 answers

How are two systems able to set up a secure SSH tunnel over a public connection?

As I understand it, when two systems create a secure SSH tunnel, the first step involves communicating the 'guidelines' for the encryption of that tunnel. If an third system is able to listen in on ...
Hoytman's user avatar
  • 483
6 votes
2 answers

Is it possible to decrypt a SSL/TLS session without doing a MITM-attack?

I'm not talking about decrypting the connection while the SSL/TLS is happening (MITM) but after the connection is closed and I have a pcap file of the entire negotiation/data transfer process. How ...
YSY's user avatar
  • 2,259
6 votes
3 answers

Why isn't it possible for a third party to decrypt HTTPS traffic? [duplicate]

I really don't know much about HTTPS. But I always hear people saying that it is 100% safe and bullet proof. My question is: Is that true or even possible. I mean there are lots of tools that allow ...
Forivin's user avatar
  • 1,019
5 votes
2 answers

If two endpoints establish a mutual authenticated connection (TLSv1.0) is the medium between the endpoints a concern?

What are the vulnerable areas when two endpoint connect via TLS? Does the physical layer or data link layer a factor of security concern between the two endpoints? Does it matter in terms of security, ...
Drew Lex's user avatar
  • 2,023
5 votes
0 answers

Why is it not possible for an ISP to man-in-the-middle attack an SSL connection? [duplicate]

If the ISP carries my data, why do people seem to think they cannot see the contents? Wouldn't they be holding the key?
Vaughan Hilts's user avatar

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