Cryptography

It has puzzles as well as an encrypt / decrypt feature. It only references the basic ciphers for now but I'll be adding more in the future if the app picks up.

You can get it on Play Store :

https://play.google.com/store/apps/details?id=com.gbcapps.cryptography

https://preview.redd.it/ltlnsvs15p161.png?width=1920&format=png&auto=webp&s=b8d98cc287e76f7940188f41ff19cdb24d6602d1

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Well, I am creating an application where I am required to encrypt the data and store in database and again decrypt it and retrieve the values from the DB in Django. Can anyone suggest me how to do it. I am pretty new to Django and learning it any help would be appreciated. Thanks in advance.

I’ve recently started researching and learning cryptography ant I’m looking for people to send me some beginner cyphers to try to decypher please and thank you.

Hello everyone,

I ordered this book(the 2015 edition) because it was recommended to us by our professor and I see now that quite a few people say it's out of date.

Is this true? And if it is, is it so out of date that it's actually bad for someone who is just starting to get into this world, or is it still going to give me valuable knowledge?

Hey all,

Long ago I encountered a library that helps developer create cryptosystems. The idea was that it contained a base of simple things that can be utilized to write your own crypto algos.

It wasn't libsodium or NaCL or something else, it marketed itself as an open source toolkit to help implement cryptography.

Does anyone know the name? Thanks!

Hello, I'm studying for an exam in Linear Algebra and I can't for the life of me figure out what I'm doing wrong on a cryptography question. Here is the question and each letter is assigned to these numbers.

Find A^-1 to decode the cryptogram. 

    A = [1 -1 0] 
        [1 0 -1] 
        [-6 2 3]

Message: 15, 18, -107, 14, 5, -57, 14, 10, -72, -6, 13, -42, 20, 7, -81, 8, 19, -94, 7, 12, -62
A = 1, B = 2, ..., Z = 26

A^-1 is

[-2 -3 -1] 
[-3 -3 -1] 
[-2 -4 -1]. 

To find the answer, it should be as simple as Message * A^-1 (The message matrix multiplied by the matrix A^-1 ). The answer I get is wrong

[130 329 74] 
[71  171 38]
[86  216 48]
[57  147 35]
[101 243 54]
[115 295 67]
[74  191 43]. 

However, this does not coincide with the numbers given. None of the numbers are in the 0-26 range. I recognize A, as well. It's the exact same matrix that was on our 1st exam and practice exam. Now the matrix isn't working. Does anyone know what the issue might be? Is there something I'm misunderstanding about cryptography or is there simply an error?

Edit: I will a post a picture of previous questions with the same matrix but different message soon.

Edit2: Previous problems

Edit3: Formatting

Edit4: My professor messed up on the problem..

Hello !

I'm a high-school senior who likes messing around with cryptography. I've completed a four part course on cryptography and written a math paper on the RSA so I guess I know enough to find the field fascinating.

I'm working with local ngos to conduct a winter break program for low income high schoolers. These kind of programs are something I never had the means to attend myself and I want to make it happen for them.

The essence of the program is to give kids the opportunity to learn cool shit. And that's where cryptography fits in.

For those of you with adequate knowledge on the topic. Would you like to volunteering online to help teach them ? It would be for two- three hours a day, for five days.

Let me know if you're interested and we can discuss some more details !!

I'm not finding any remote access software that is officially FIPS-validated. When I say remote access software, I am thinking of applications like TeamViewer, not a VPN client. Any on the list that you guys are aware of?

Also, what about something like a Synology NAS being access through a TLS connection? Can a TLS connection via a web browser on Windows ever be FIPS-validated?

Hey guys, I'm looking for a book (made out of paper, not digital) about (just throwing some keywords):

• Cryptography
• Encryption (symmetric and asymmetric)
• hash algorithms (both fast for checksum and slow for passwords)
• applications of the above (SSL, email, credit cards, ...)

I want the main focus about the exact mathematics involved in these algorithms. And maybe something about the best practices in reality. But since this topic is around for decades, the book does not have to be super-up-to-dace.

Edit because people were asking: I have a masters degree in technical mathematics. But not a big background in CS or software dev

Thank you guys in advance :)

This is another installment in a series of monthly recurring cryptography wishlist threads.

The purpose is to let people freely discuss what future developments they like to see in fields related to cryptography, including things like algorithms, cryptanalysis, software and hardware implementations, usable UX, protocols and more.

So start posting what you'd like to see below!

Hello,

I am looking for an INDIVIDUAL to do some content writing.

I would like between 10-20 pages content to be extended, to make the pages longer and better. And more is possible.

You MUST have good knowledge of how TLS/SSL Certificates work, and be somewhat familiar with brands such as Comodo/Sectigo/GeoTrust/DigiCert.

You will also need to do a bit of keyword research to see what some good target keywords to add into the content is.

I will pay between $40 to $60 USD per page done. Depending on the quality and length.

You WILL need to prove you have the needed knowledge, you can show some examples of work, or just talk to me and tell me what you know.

You WILL need to show me some examples of your work.

I will provide to you one page to do before we decide on you doing all of them, so i can be confident in your abilities. Some may not like to do this ( as i will not pay unless it's good quality and usable), but sorry, this is a requirement. If your confident in your ability then there will be no problems. And if all is good, i will pay for the work, and you will get the job.

I will do NOT wish to talk to anyone who is from an agency. I want to work with ONLY an individual.

If you believe you have all of the above, please contact me.

I'm in my first year of university doing a 3 year course for Maths, however I would like to have a career more towards computer science. Someone suggested cryptography to me and I am quite interested in it. I was wondering how I could actually get into cryptography, as I don't really know where to start. The only thing I've done that is somewhat close is learning python (my course requires me to do so anyway, and I may learn Java just on the side if I have nothing to do).

Make up a cipher or whatever and put it in the form https://surveyheart.com/form/5fb53c7f32b2de22eb84338d

This is a long shot, but has anyone taken Cryptography last year, and knows how the curve is? I've gotten below average on the one quiz we've had so far, and I've been pretty average on the homework, so I want to figure out if I should drop the class or not, before this sunday.

Thank you!

I find args very interesting, but i know little about cryptography. Is there any source(book, website, actually anything) that i can learn from?

If someone encrypt some data and keep password secret, this gives they exclusive access to the data and seize other people's liberty of accessing it, which forms a power hierarchy (very much like how material private property work). Now, is there a way to justify this power hierarchy? If not, will encryption be obsolete in an Anarchist society?

Was planning to take applied cryptography for spring 2021. can someone suggest a plan where i can come up to speed on the maths required for the course?

I have taken discrete math, calc1/2 and linear algebra in undergrad but that was a long time ago.

would love to hear inputs from anyone who has taken this course.

Hi,

Crypto noob here, I've been reading this post by Yubico on how OTPs are generated. I'm curious as to why symmetric key cryptography was selected to generate the OTP. If Yubico's servers are hacked, the hacker would be able to generate spoofed OTPs for any user. This problem seems to be avoided if public key crypto is used, and Yubico stores only public keys instead of AES keys.

Hello!

I wanted to take CO 487 during the winter and I would like to know how the course is in terms of difficulty. I have the following course (amath 353, phys 359, amath 361, phys 334). Would it be doable to take co 487 with these courses? Is it a course that you spent a lot of time studying for? Any information would be helpful.

I recently gotten interested in the subject cryptography and would like to know more about it.