Authentication is successfully validating that an entity you are communicating with is actually who they claim to be. The entity typically demonstrates who they are by showing they possess a secret that only they could know.

learn more… | top users | synonyms

0
votes
0answers
15 views

PAN authenticatable irreversible tokenization algorithm

I need to implement algorithm to create authenticatable irreversible tokens from PAN, without using any secrets. Is it possible? Is there any standards for that from associations? I was thinking ...
0
votes
1answer
53 views

What is a simple information authentication protocol for constrained devices?

Background: I have an application where devices will poll information from some source on the network. These devices are very basic and have modest processing and memory capabilities. Hashing (and ...
0
votes
1answer
76 views

AES GCM encryption, authentication and PBKDF2

I'm developing a kind of secret vault server application. The basic principle is similar to DPAPI where each secret will have its own unique random KEY/IV pair and and that KEY/IV pair will be ...
0
votes
1answer
56 views

How to use the hardcoded server's public key to register a client application?

I'm designing the security for a smartphone app that can be used to make car reservations. Clients have to register them with their driver's licence through the application and can then book a car. ...
0
votes
2answers
43 views

What info should be signed with a digital signature to provide entity authenticaton for DH?

$i \to r\colon\; g^x\bmod p$ $r \to i\colon\; g^y, \langle g^y,g^x\rangle_r$ $i \to r\colon\; \langle g^x,g^y\rangle_i$ Looking at run 2, I am trying to work out why it is necessary to include $g^x$ ...
0
votes
0answers
30 views

Is it okay to bail out early when length mismatch is detected?

Is it okay to bail out early when length mismatch is detected? Specifically, when verifying authenticated encryption, is it okay to bail out early if the wrong amount of ciphertext or the wrong ...
0
votes
1answer
59 views

Creating a message authentication scheme

I have such situation. I have a device like dongle. But it has certain limitations. For example, it can only have implemented encryption and decryption functionality. The availability of ciphers ...
0
votes
0answers
24 views

Advantages of the general digraph trust model over the strict hierarchical model

Are there any advantages of using reverse certificates and the general digraph trust model over the strict hierarchical trust model as described here: In the digraph model each CA can generate ...
0
votes
0answers
153 views

Key exchange using hash function

Consider two types of attackers on a key exchange (KE) protocol and subsequent communication between the parties which used this KE instance to establish a secure communication key. Attacker Eve ...
0
votes
0answers
48 views

Why doesn't this authentication protocol work? [duplicate]

I am a student taking a cryptography course so forgive me if this comes off as a silly question. This is an assignment question: Alice ------R--------> Bob Alice <-----[R]B------ Bob Alice ------[...
0
votes
1answer
78 views

Which one these alternatives using authentication and encryption will solve this multiple-user database problem?

Which one these alternatives using authentication and encryption will solve this multiple-user database problem ? I'm trying to understand the field of cryptography, so I've started reading a ...
-2
votes
0answers
119 views

Symmetric-Key Based authentication [closed]

So i've managed to answer all the other cryptography questions, but I have not come across this exam style question before, and need help.