Linked Questions

0
votes
0answers
89 views

Custom password security algorithm? [duplicate]

How secure would it be if you applied custom algorithms (that you obviously wouldn't reveal to the public) to a hashed password? Like splitting up a hashed string, shuffling it around, possibly even ...
1
vote
0answers
38 views

Revocation list for a custom solution

If I have a network of machines inside a company that use certificates for various services. All of these services and machines are internal and never have to deal with public facing technologies or ...
0
votes
1answer
81 views

What are the industry guidelines on sharing secrets like API or access token?

I'm currently looking for guidelines on sharing API tokens or Access tokens securely, for integrating a third-party application with my own. The two methods I'm currently thinking of are: PGP: I ...
3
votes
2answers
378 views

How to check that the user entered the correct password when decrypting a file?

I'm trying to create a program for encrypting/decrypting different files. I have not problems with the code, I just don't know how to save the password for every file, which was encrypted through my ...
0
votes
1answer
108 views

Is this strategy end 2 end encryption and secure?

I'm passing sensitive financial data to a payment processor online via cloud functions and would like your expert opinions, please. The workflow is as follows: A customer indicates they want to ...
0
votes
2answers
152 views

How to prevent buffer overflow attack?

int main(void) { char buff[15]; int pass = 0; printf("\n Enter the password : \n"); gets(buff); if (strcmp(buff, "thegeekstuff")) { printf("\n Wrong Password \n"); } ...
8
votes
4answers
217 views

How much security expertise does a general application programmer need to develop software ethically? [closed]

I am curious about this. I saw this thread: Why shouldn't we roll our own? and this answer: https://security.stackexchange.com/a/18198/144241 which had on it this comment, which had the second ...
1
vote
3answers
3k views

Any hints for programming my own password manager? [closed]

I mostly want whatever help & suggestions you can give me about what I should avoid & what I should think about when making this. I'm a reasonable programmer & I want to make my own ...
33
votes
3answers
7k views

What does “in-house hash function” mean?

In security news, I faced a new term related to hash functions: it is reported that the "in-house hash function" used in IOTA platform is broken (i.e. Curl-P hash function). You can find the complete ...
27
votes
10answers
12k views

How to secure passwords over HTTP?

Say my password is abc. I want to send it to the server over HTTP. I could send it in plaintext and let the server hash it and compare it to the entries in its database, but then anyone that can see ...
25
votes
6answers
9k views

What would be the key size for a picture used as a key?

I'm working on a cryptosystem that uses colour pictures as keys for encryption. I'm trying to guess what is the key size of my cryptosystem in order to find the feasibility of a brute force attack. My ...
0
votes
1answer
146 views

Is it safe to store user's secure pass-code in database with encrypted form while creating bitcoin wallet?

I would like to create a Bitcoin Wallet. Part of the process is to store public and private keys in encrypted form in server database. All keys I am storing is encrypted using user's passcode. 1) ...
0
votes
3answers
352 views

Encryption of TCP communication?

I am using an exe application which is communicating with a Raspberry Pi device with manually configured TCP ports. The application will send data from port 1234 to the Raspberry Pi which is listening ...
0
votes
1answer
380 views

Using AES encryption to generate MAC (and provide authentication/integrity)

Ignoring that there are far better and more standard approaches to providing authentication and integrity guarantees, what (if any) weaknesses would a system as outlined below that relies on AES (AES/...
0
votes
1answer
285 views

What's the best way to store the passwords? [closed]

What is the best way of storing my passwords? Which storage is considered the safest one? How safe/unsafe is to store passwords in the local MySQL database?

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