A description and set of rules for the ordered exchange of structured information designed with the goal of protecting the security of the system.

learn more… | top users | synonyms

4
votes
1answer
124 views
+50

What are locked domain names technically?

I just learned about domain name locking at registrar level. I’m having problem to understand what it is, all I found is it’s a protection against domain name takeover through transfer. Now, I also ...
4
votes
0answers
20 views

SSL 3.0 for clients without room for chosen plaintext attacks

I've collected the issues that affect SSL 3.0 and found that they are either configuration issues (disabling RC4, RC2, DES, anon, export, null suites, compression, proper key lengths, etc.) or ...
-1
votes
0answers
17 views

Is Yahalom protocol secure or not? [closed]

Let's consider Yahalom protocol. ​The Wikipedia says that it is less secure than Needham-Schroeder. ​ I do not understand why.​ Why is it an insecure protocol?
-1
votes
0answers
15 views

Yahalome protocol is (not) secure. Why? [closed]

Let's consider Yahalom protocol. The wikipedia says that it is less secure than Needham-Schroeder and I know how to attack on Needham-Scroeder with MitM attack. But I can't see how to attack (in any ...
0
votes
0answers
27 views

How to update a non clientUpdateProhibited domain name?

So I recently learned about domain name locking after having found the *.co domains of a top web site weren’t protected against server and client updating/transfering. (while the .co tld offers all ...
7
votes
2answers
95 views

How can I implement a secure download area on a website which requires an electronic signature?

For quality management purposes, the company I work for would like a system which requires a client to read through a disclaimer and then provide an electronic signature, acknowledging said ...
-1
votes
0answers
28 views

Distributed Transmission in Protecting Satellites from Attacks?

Assume that the attacker knows with a time lag tau the location and input frequency of the satellite because he can detect and estimate the frequency of the satellite. He can pump a greater radiated ...
-2
votes
1answer
57 views

Is it possible to build unbreakable Protocol Obfuscation? [closed]

Using Protocol Obfuscation some internet protocols have tried to evade traffic shaping. BitTorrent supports Protocol Obfuscation for instance. Is it possible to build unbreakable Protocol ...
2
votes
0answers
38 views

Is anonymous message delivery feasible? [closed]

I came across two papers written on this topic: Buses for Anonymous Message Delivery and Tokens for anonymous Communications in the Internet I am probably missing a lot of the nuance, and I could ...
4
votes
1answer
115 views

What are the security implications of enabling a SNI-hole on a web server?

A web server (let's say Apache 2.4) implements SNI. It is configured with a 4096 bit SHA384-signed Wildcard Certificate (*.land.org) with a Subject Alternative Name (land.org). The Certificate ...
4
votes
3answers
779 views

Secure communication between two applications on the same system

I'm writing a software which is divided into two separate stand-alone pieces. One is a service like application that handles all the logics, the other one is a GUI application that just works as a ...
0
votes
1answer
37 views

Are T4 and/or T30 fax protocols secure/encrypted?

I am trying to determine if the documents I send from my office fax machine are encrypted/secure or not. I found this article which kind of explains the current state of fax security: According ...
3
votes
2answers
85 views

Encryption in peer to peer chat

For a homework assignment I'm developing a chat service that will be able to communicate within a single network. The communication channel should be encrypted with RSA. Should I generate keypairs ...
66
votes
16answers
9k views

Ensure that a file can only be decrypted after a specific date

Are there any cryptographic schemes/protocols that would allow me to encrypt a file, make it publicly available, but ensure that it can only be decrypted after specific date? I assume it would be ...
2
votes
1answer
473 views

IKEv2 vs OpenVPN

I want to ask you for information about the IKEv2 protocol for a VPN connection. I haven't found so much information on the web. I am interested especially regarding the usage on a mobile phone. Is it ...
0
votes
1answer
27 views

Security Protocol Notation Editor [closed]

Are there any editors or tools that support the secure protocol notation?
1
vote
0answers
48 views

Known insecure IoT devices [closed]

I would like to create my own twist on intelligent home using various IoT devices. My goal is to try and pentest said devices in real-life-like scenerios. I'd like to cover various popular protocols ...
2
votes
2answers
80 views

DoS Reflection attack using CharGen protocol

I'm researching DoS Reflection attacks w/ amplification, and Wikipedia says that one of the "worst" amplification services is the Character Generator Protocol. Frankly, I have never heard of this ...
5
votes
2answers
508 views

Is there any protection against malicious devices on a CAN bus?

CAN (controller area network) is a bus used in all modern cars. You can read a lot of the cars information over this bus and I think (but I'm not too sure about this) that some critical control ...
0
votes
0answers
18 views

Kerberos Replay Attack- Scenario which server is not aware there is a replay attack

I'm researching about Kerberos protocol, I understand the logic of Kerberos but, I cannot solve that assumption. The case will given below: Servers check that the time stamps on authenticators are ...
1
vote
2answers
94 views

Protocol for secure communication over HTTP

Inspired by this hot question: Is there any reason to block HTTPS? Is there a way to setup an own server and encrypt all normal requests in the request body? So for an outside person it would look ...
1
vote
2answers
65 views

preventing reflection attack

I was reading the solution to the reflection attack and have some confusion as to how Alice would know Bob is a liar and isn't really Bob. 1. Alice initiates a connection to Bob 2. Bob challenges ...
0
votes
0answers
29 views

How to interpret Burrows–Abadi–Needham logic notation

I've seen papers with a funny notation and I'm having trouble identifying what it is and understanding what it means. This is the best resource I've come across so far (taken from here): ...
-2
votes
1answer
119 views

Is rolling your own network protocol insecure? [closed]

By now, everyone on here should know that rolling your own crypto is bad. But what's about rolling your own (encryption supporting) network protocol? I'm working on an open-source project (by now ...
1
vote
0answers
69 views

What are the formal methods to analyze Authentication Protocol

I designed an authentication protocol for consumer-producer applications, which barrows features from Kerberos and Tesla. To check the strength of protocol I considered different well known attacks ...
-6
votes
1answer
58 views
7
votes
3answers
6k views

What makes the Blackberry device and network more secure?

One of Blackberry's strongest assets is the "network" that it uses. Can someone explain, or link to technical information that covers what this secure network is, and what it does better than the ...
7
votes
3answers
36k views

Four-way Handshake in WPA-Personal (WPA-PSK)

Can someone explain to me in what consists the Four-way Handshake in WPA-Personal (WPA with Pre-Shared Key), which informations are being sent between AP and client, how is it possible to find the AP ...
7
votes
3answers
1k views

How do I identify an unknown port/protocol that my IDS picks up?

Googling a port and protocol leads to a terse description at best, and a link farm in the average case. Most protocols on assorted, unknown high ports contain little or no plain text, and often if ...
4
votes
1answer
124 views

What are the benefits and risks of various TLS Handshake protocols?

This question asks if it's possible to separate the rest of a TLS session from the handshake for "security reasons". The question wasn't specific on what that "reason" might be. This made me ...
1
vote
1answer
9k views

What TLS and SSL protocols should I have turned on

I am using Explorer as my browser. What do I have to have on regarding the TLS and SSL protocols. There are several of each one.
0
votes
1answer
72 views

How secure is this security protocol? [closed]

I'm developing an application that will encrypt a bunch of files the client has on their machine and then send them to a server, to back them up. I need to encrypt the files so that other ...
37
votes
7answers
63k views

What is the difference in security between a VPN- and a SSL-connection?

I would like to design a client-server application where the server is placed on Internet. I assume that I could set up the client-server connection using VPN (is it using IPSec?) or using a SSL ...
4
votes
0answers
132 views

Secure backup encryption with OpenSSL

I know, the general advice is "keep your hands off crypto stuff". And the standard way to encrypt backup data securely would be using GnuPG. However, for a rather academic exercise, I would like to ...
2
votes
2answers
730 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 ...
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 ...
2
votes
0answers
115 views

Biometric device instead of password - signature security

Lets assume that there is a biometric algorithm for user authentication which compares fingerprints with an user's signature saved in database (comparing function is not important here). Next there is ...
1
vote
1answer
51 views

Detect if AES and hmac keys are invalid

I have a server which has a configured value of AES and HMAC key. The client also should have the same keys. When the client sends a request, the server interprets this request and reads the message. ...
2
votes
1answer
1k views

How does a password authentication over a TCP protocol actually work?

When coming up with a password based login protocol, many solutions come in mind: User sends password in plain text. Compute hash on Server, compare to hash in database. - Bad because attacker can ...
-1
votes
1answer
171 views
50
votes
3answers
45k views

What is ECDHE-RSA?

What is the difference between ECDHE-RSA and DHE-RSA? I know that DHE-RSA is (in one sentence) Diffie Hellman signed using RSA keys. Where DH is used for forward secrecy and RSA guards against MITM, ...
10
votes
2answers
384 views

Are there any meta-formats for crypto?

Are there are any (properly specified) meta-formats / schema formats for describing cryptographic message structures? I'm looking for a way to describe the format (where some channels might want ...
0
votes
0answers
63 views

Ensure that a file can only be decrypted after a specific condition is not present

Are there any cryptographic schemes/protocols that would allow me to encrypt a file, make it publicly available, but ensure that it can only be decrypted when a specific condition is not present (I ...
1
vote
0answers
66 views

How to decrypt a file only if specific conditions are not met [closed]

I know how to decrypt a file after one or more specific environnemental conditions are met (with secure triggers). I am interested in a cryptographic sheme that would enable decryption of data only ...
-1
votes
1answer
55 views

What is the best formal method to prove the privacy (anonymity) of a security protocol

I am studying about TOR. I require to formally verify that the involved protocols provide anonymity. However, I could not find a suitable formalism of anonymity. If there exist any ...
0
votes
1answer
24 views

How to interpet RFC data format

I'm having slight problems reading the used format in an Internet-Draft: TokenBindingProtocol#Section6 here enum { provided_token_binding(0), referred_token_binding(1), (255) } TokenBindingType; ...
1
vote
2answers
95 views

Is SSL over HIP (Host Identity Protocol) possible?

In this relatively short Host Identity Protocol (HIP) overview Host Identity Protocol: Identifier/Locator Split for Host Mobility and Multihoming it is stated Most Internet applications can run ...
2
votes
0answers
156 views

What is a 'host identity' in the 'Host Identity Protocol' (HIP)

I'm a little confused about terminology in the Host Identity Protocol (HIP) The two distinct terms Host Identity and Host Identifier are described in https://tools.ietf.org/html/rfc4423#section-3 ...
22
votes
2answers
1k views

Aviation security - Lessons to learn from PlaneSploit

A somewhat related question has already been asked (What would one need to do in order to hijack a satellite?), only at a more abstract level. Now we have a presentation by Hugo Teso from n.runs AG ...
0
votes
1answer
417 views

Is it safe not to encrypt ping packets?

I am running encrypted communication with ping tacked on after decryption and deserialization is complete. I.e. incoming data -> split into packets -> decrypt -> deserializer -> actual message or ...