just testing that now, that is the problem, every time i encrypt cat with the same keys it gives me a different output?
The parts in the list view are all my attempts at encrypting the word cat.
Why would it change every time?
To encrypt a string whose length is x, you will have to generate key-pair of length 8x + c, where c > 1. (for padding) 
Right ? But the generated key is 1024 and I put in the word cat so that's plenty big enough right?
I even tried with 4000 and same thing. It's all to do with the encrypted text changing each time the word is encrypted, so I can't call data from tinydb as the data changes every time. That's when I get the error when it can't find the data. If I don't encrypt the tinydb tag , it encrypts, stores and decrypt fine without error
I am sorry but I don't understand what your trying to show in your last comment?
Are you just shoeing that the encrypted data is different each time like I already mentioned?
I'd so how are you meant to use it with a database when you can't search for the same tag?
Show how you are using your procedures... encrypt and decrypt.
Also check the documentation from the first post.
They literally just call the encrypt part of the extension with the private or public key attached and the input being what it encrypts.
And yes I read the documentation from the first post before I commented. Like I said everything works fine if the tag isn't encrypted.
All I want to know is why the encrypted text changes everytime. Surely if your using the same keys everything you encrypt the same word it should output the same thing right?
My problem is I can't search for the tag in the tinydb if the encrypted data isn't constant.
Probably this is the issue. They aren't same.
Yes but why aren't they the same?
I am not sure if this is the correct answer but i have read somewhere that all the encrypted text are different but when you decrypt it , it will give the same text. Thats to maintain security.
Correct me if i am wrong.
1 Like
But with that being the case how are you meant to retrieve encrypted data from a database?
Only way I can think to do it is to decrypt every tag and compare them each in turn with the searched tag. And when you have 100s of tags that is going to use a lot of resources and take a while to do so it's not exactly feasible.
You should use Symmetric Encryption then as Asymmetric Encryption can be difficult to manage.
Then i would suggest to make your own encrypt and decrypt with replace text.
Yeah I already have one, just wanted to test this one as I heard good things about it. Just a shame that it's only real use is for something like instant messaging where the data doesn't have to be stored.
1 Like
Hi, we have a scenario where we have to encrypt the data on the phone and decrypt it on my laptop. I have tried to generate keys separately and use it in the app. Using the public key, I was able to encrypt the file. But, I am not able to decrypt it using the corresponding private key. If anyone has any similar implementation, can you help me out?
You can find the source code here:
It is suggested to use extension in apps only but it will work for different platforms too if you change few things in either of them.
So the requirement is that we collect data through the app over the phone and with this extension we are encrypting that csv file. However, due to privacy concerns we only want to decrypt the file on a particular laptop and for that we wrote a decryption algorithm but it is unable to decrypt because the encryption format is different from what we wrote. Do you have a decryption algorithm that we can use or any idea on what format ( bytes ) does the decryption happen?
1 Like
The algorithm used is RSA/ECB/OAEPWithSHA-256AndMGF1Padding. You can convert source code into a JavaFX application.
1 Like
You have the answer????
How works Private and Public encryption (Dummy example)
1- Take a random (and very very large) prime number, ex; 97 & 89
2- Algorithm make his magic for Private key, ex; 97
3- With private key create a Public key, ex; 31
4- With private key you encrypt a message and share the public key with the person that need decrypt the message ex; Mencrypt: Hi+Private Key [97] = aBcD128 & then, with the Public Key (shared) can Mdecrypt: aBcD128-Public Key [31] = Hi
Where (+) and (-) represent the algorithm.
5- So... Public Key can be shared with no problem (All Api's use it)
How to use Secure Online/Local DB to store Private Keys
1- Nothing it's secure
2- It's not necessary store the private and public keys, it can be generated each time and every time that you need it. (your use case).
3- If you need to store them, PLEASE... don't use default names and extension like TinyDb and Keys.db cause it's like to say "Hey!!!! here is my sensitive data, please open it and destroy everything!!!"
4- Change the names and extensions like tgopxfcd.huy or something like that (use random generators), automate the process (pick, change extension, extract info, close, etc) in blocks.
5- Firebase and Supabase has especial vault to store sensitive data, USE IT. not from Api requests (you are the owner of that database).
6- Nothing its secure.
Why you should secure your app and data????
1- Cause like i say... nothing it's secure.
2- Zero trust principle.
3- All data matters!!!
4- Most of apps created with this platforms, are used to iot or share sensitive info. In iot case... i don't want anybody turning on/off my lights, coffee or TV at 3 am. And sensitive info case... I don't want anybody see my notes or sensors data.
What do you think about it???
- Useful
- Useless
- i don't care
- Nevermind
- Don't bother me
0
voters
2 Likes
Thanx for the extension.