This subject ties into my different ideas of designing a cold storage.
Part of the idea was to store the 24 word seed in randomized order in a bank safe (this should prevent malignant government or bank related parties from stealing my BTC).
In addition to that I would encrypt the order and the instructions to my "heirs" and store it in a dead-man's switch email service.
I do not feel comfortable leaving unencrypted information online in any way shape or form.
So I would like to encrypt the instructions and the order of the seed.
First I looked to PGP but disadvantages are:
1. complicated
2. no user-friendly software
3. error-prone with multiple lines of encryption
4. servers etc.
I thought PGP was an overkill for the problem I have anyway so I thought why not try symmetrical cypher.
To that end I did some searching online and read that AES-256 should be sufficiently strong tool for the job.
To get acquainted with the technology I usually start with an online tool. So I tried encrypting simple messages like "Cheers" with a password "onetwo" under the following pages:
https://aesencryption.net/https://www.browserling.com/tools/aes-encrypthttps://encode-decode.com/aes256-encrypt-online/Literally none of the pages came out with the same result.
And the champion is
http://www.bierkandt.org/encryption/symmetric_encryption.phpWhich not only does not come up with the same results, but spits out different results every time you click on Encrypt (although the text and the key remain the same).
So could someone with the knowledge of subject please explain what is going on:
1. I am too dumb to use the pages properly
2. I am using wrong settings
3. The pages in question are spitting random junk out
4. something else
Thanks