Questions tagged [salt]
A salt is a random addition to a password to make the hashed password less susceptible to a lookup table attack
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questions
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Why people say that salt helps to prevent rainbow table attack? [duplicate]
I am using some frameworks that store salts inside databases. For example this article shows how DeviseĀ stores salt together with the user information. My question is why do people say that salts ...
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2answers
70 views
Is necessary to use salt if I use a complex password? [closed]
I read that it is important to use a salt together with the password to avoid rainbow table attack. I agree with that, but is there any difference, in terms of security, if
I use password + salt or
I ...
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3answers
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How does a 'rainbow table' hacker obtain password hashes in the first place?
I don't understand this part of the Rainbow table attack.
In all my Google searches, it says that a hacker uses a rainbow table on password hashes.
But how does the hacker obtain the password hashes ...
8
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3answers
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Client side password hashing with exposed salt word - did I find a breach?
I downloaded a software that has a login interface. It's a $100 a month subscription software.
I disassembled the software and found that passwords are being sent by combining them with a hard coded "...
2
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0answers
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What's the point of salting Double Submit Cookie (CSRF protection)?
Django web framework uses the Double Submit Cookie pattern for CSRF protection. (The CSRF token is sent in a cookie and also in a hidden form field. Incoming requests are checked for a match between ...
0
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1answer
75 views
Writing a Simple SHA256 Salted Hash Generator
I saw a video detailing how to write a simple salted hash program in C# here. Below is the code they wrote (slightly edited for console applications):
using System;
using System.Text;
using System....
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1answer
225 views
Oversalting Potentially Harmful?
I find it hard to believe, and figure I just missed or forgot something obvious (years since I thought about this stuff), so maybe someone can point it out. But it seems like most of what I know about ...
0
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1answer
64 views
Can a salt be a random ASCII string or be derived from one?
I'm using a KDF (PBKDF2HMAC) to generate a Fernet key from a given password, but to do so I also need to generate and store a salt.
import base64
import os
from cryptography.fernet import ...
0
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1answer
280 views
Can't solve format for Salted SHA1 hashes with Hashcat?
I am attempting to understand the format for this Salted SHA1 hash for an assignment. The line of text I was given was:
nameExample@email.com,nameExample,nameExample@email.com,nameExample,,,...
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1answer
60 views
Using a Pepper as the index to insert a salt
In this question on this board the author of the selected answer states the following.
If you, as an attacker, manage to extract hashes and salts from a database, you probably either find a way to ...
4
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1answer
785 views
Which part of this encoded Argon2 hash is the salt?
I was reading the post Is it safe/wise to store a salt in the same field as the hashed password?:
$argon2i$v=19$m=65536,t=3,p=1$YOtX2//7NoD/owm8RZ8llw==$fPn4sPgkFAuBJo3M3UzcGss3dJysxLJdPdvojRF20ZE=
...
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3answers
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Using two salts - one stored with the password, one stored in a random row in a separate table
Imagine a login system is being created, and a user's password is hashed thusly:
Users.password = PBKDF2(salt1 + password + salt2)
The result of that ^ operation and salt1 are stored side-by-side in ...
0
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0answers
14 views
Save salt in DB [duplicate]
I'm trying to create a random salt on the user thing and complement the salt on the user thing in the DB.
Is it safe to add salt to DB?
If you attack DB and salt is stolen, there is a concern that ...
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9answers
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Is there a way to add salted hashing to my user authentication without breaking my former login server
I am presented with the following scenario:
I have a MySQL-Database with a table of users. The table has two fields: username and password. The password is stored as an unsalted hash.
An over 15 ...
0
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1answer
96 views
should giving salt to unauthenticated users be a problem
Let's say i have a scenario when the user salt is required in client side before login,
the user obtains the salt by this url http://my-api.example/get-salt/userid
that url should return a salt for ...
1
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1answer
107 views
Password hashing with salt. Where do you leave the salt? [duplicate]
I want to hash a set of sensitive data using a hash+salt. I've done a little research and now I know that:
The salt should be random.
The salt should not be reused.
Using hashing without salt makes ...
0
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1answer
94 views
How should we apply the salt to the password? [duplicate]
According to Wikipedia:
A rainbow table is ineffective against one-way hashes that include large salts. For example, consider a password hash that is generated using the following function (where "|...
2
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2answers
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Am I using RfcDeriveBytes correctly, when the salt I'm providing it contains the password?
I'm using Rfc2898DeriveBytes in my application to encrypt a password with a randomly generated salt, and with a set iterator count for slowness.
Before, I just grabbed the generated salt and put it ...
1
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3answers
338 views
Anonymizing IP addresses using (sha) hashes; how to circumvent rainbow table attacks?
Under GDPR, IP addresses are personal data. I have no need to trace back IP to specific users, but I would like to limit downloads to one per IP.* I do not want to store plain IPs.
My first solution ...
22
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8answers
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How can I re-use my password and still protect the password if it is exposed from one source?
I know that all servers should at least store my credentials as hash(password + salt) + salt, with a secure and well known hash function and a salt unique for me, generated from a secure and well ...
2
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1answer
125 views
is it safe to AES encrypt the RSA private key and storing it in the database
i'm building an app that really needs encryption of this type , my question is it safe to store the aes encrypted RSA key in the database ?
here is how i encrypt the key :
i generate a random 256 ...
0
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1answer
85 views
How to identify the right hash from a list of salts and pre-given password during authentication?
I apologize for being naive, but I only recently started learning about cryptography and how to go about the security online.
From what I've gathered, the safest-without-sacrificing-efficiency way ...
0
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0answers
129 views
How long will it take to crack a hashed random string
If I generate 128 bit, 512 bit and 1024 bit random strings using either:
A native rand() function (C, PHP, Python, etc)
OpenSSL random bytes
Hardware generated random number
And hash the random ...
0
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3answers
72 views
How to make the first request which used to create account safe? [duplicate]
To authorize user, our application defined below steps:
Send user email and password (plain text) through HTTPS.
When server received it, generate a salt to hash password and store it.
When user ...
1
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2answers
188 views
Letting client encrypt his/her data. How to ensure the client doesn't lose his/her private data?
I am designing a web service where the client is allowed to encrypt his own data on client-side software & then send it to our server, so they can be sure their data is private on our side. Then, ...
2
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1answer
477 views
Do I need to use salt with api key hashing?
I will generate api keys. I plan to store their hashes instead of plain text. do i also need salt, similar to storing password?
AFAIK salt prevents rainbow table attack and those are more ...
0
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1answer
66 views
Password storage which avoids privileged insider attack
What are the standard password authentication protocols in client-server setting where authentication happens at the remote server? Is there any password/pin verification protocol which reveals zero ...
2
votes
1answer
359 views
Is hashing without a salt secure for random passwords? [duplicate]
I'm designing an API with token authentication.
I don't want to store tokens as plain text in the database, for the same reason user passwords are not stored as plain text: if the database gets ...
0
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0answers
28 views
Is a combination of user login and site domain a sensible salt? [duplicate]
Just out of curiosity (since I know the established password hashing libraries should provide "proper" random salts), would a combination of the user login and the respective site's domain (or a hash ...
0
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1answer
49 views
Secure Register - Login Portal [closed]
Im trying to create a secure portal for parents to view their sons or daughters information.
I would need to have a register page. Im having trouble with hashing and salting the password.
Then I ...
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2answers
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Appending a secret (pepper) to Argon2 password hashes
I've read quite a bit of the StackExchange and HackerNews debates on the user of "peppers" in password hash security. There are a number of different implementations of the idea of a pepper, ranging ...
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3answers
318 views
Hash pepper in web application possible?
I have read a few articles and several question on here about hashing correctly.
While hashing, adding salt and especially pepper is primarily a server side use case, I am interested in the ...
0
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0answers
614 views
bcrypt.checkpw() returning true for different salt+hash
new user here. I've tried searching for an answer but I don't think I know the correct terms to search for. I've tried things like "bcrypt same password different hash" but can't find an answer to my ...
0
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2answers
2k views
How long does it take to compute hashes using the MD5 hash algorithm? [closed]
1) If one iteration of MD5 takes x seconds, is it safe to assume that n iterations of MD5 takes n * x seconds?
2) Will salted and unsalted versions of md5 hash algorithms take approximately the same ...
0
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1answer
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hashcat - cracking a salted sha256
Given a SHA512 hash, a salt, and username I am trying to crack the hash using hashcat. Every example I've found used a hashfile as input, is there way to provide salt and hash via commandline without ...
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1answer
244 views
Best tool for cracking SHA-1s with unique pre and post salts? [closed]
I can't find a tool that supports cracking SHA-1s with different pre and post salts. Any suggestions?
0
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0answers
36 views
Where do salts come from? [duplicate]
A salt can be a random value and length. The hash and the salt are stored in the database.
Is there a separate salt generator function used? Is it just a random generator?
Does it need to be a ...
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1answer
206 views
Does salted password hashes expose users with blank passwords?
Traditionally, a 'salted' hash of the password is stored along with the salt so there is no plaintext in the database and still be able to authenticate the password.
The salting process consists of ...
3
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2answers
357 views
BCrypt workfactor for salt?
From what I read here: How to securely hash passwords?, you're supposed to iterate the hashing. However in the implementation of BCrypt for .Net uses the workfactor (2^wf iterations) in the '...
1
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1answer
99 views
Recover SHA1-encoded email addresses
Say you have a list of SHA1 hashes which are all encoded with the same salt. All of these are email addresses and you know at least one combination of hash and email address.
Is it possible to use a ...
0
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0answers
5k views
How do I combine a salt and hash for John The Ripper? [duplicate]
I found a password hash
*61A2BD98DAD2A09749B6FC77A9578609D32518DD
I found a salt somewhere else.
How do I combine these to feed into John the Ripper?
When I run John on the hash (minus the *) John ...
0
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1answer
145 views
Implementing SRP without storing the salt anywhere
I am attempting to use SRP to verify clients when they authenticate with a webserver, so that the password is never sent over the wire.
Looking at the SRP procedure, when a client registers with the ...
3
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1answer
480 views
Difference in between salt and random padding in cryptography
I would like to know what is difference in between using salt and using "random padding" in cryptography. I am familiar with term salt when we use it with hashing. How does "random padding" differ ...
3
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3answers
940 views
How is a pepper used with salted passwords?
How is a pepper (a large constant number) used after a password has been salted with a salt by a hashing function such as bcrypt?
From Sybex CISSP Official Study Guide, 8th Edition (2018):
Adding ...
2
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1answer
127 views
Slow Hashing Without a Salt?
I'm trying to design a security scheme that involves a shared secret but isn't a traditional account password situation. The server would store a set of "keys", each of which has a blob of data ...
3
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4answers
761 views
Common format to send encrypted data + IV?
I have an app that receive data from third parties using various protocols: MQTT, HTTP, AMQP, ...
Some clients cannot use TLS (iot devices without TLS support), so we need to find some compact and ...
1
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1answer
813 views
Hash a secret API key with a random salt instead of sending sending it alone in REST API
Say, I have an internal https API endpoint used only by me being the admin.
In each each request I send a secret API key for authentication. And I'm fine with this solution.
curl -x PUT .......
-...
3
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4answers
1k views
Securing hashes of short enumerated values
The system manages and stores sensitive data of short strings.
Because the sensitive data is of an enumerated type with limited set of well known values, the attacker could easily iterate all the ...
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1answer
112 views
How to securely generate and store the salting for password hash? [duplicate]
Assume a client authenticates using the password, which includes hashing and salting. The hash values are stored in a remote database server.
Questions:
For the hash values stored in the database ...
0
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2answers
860 views
Generating salt for hash that occurs on server and client
Let's say I have an API call which is supposed to check if email address exists in the DB, without transmitting the actual email address.
For that purpose, I've decided to store SHA256 hash of the ...
