Re: Memorizing a 128 bit / 256 bit hex key

On 6/18/2024 6:55 AM, Stefan Claas wrote:

You thoughts please, gentlemen.
 Let's say you travel and do not want to store your secret hex key on your
device and recreate it from memory.
 What do you think about this proposal?
 $ printf '%x' $(date -u -d '1979-01-01 12:34:56' +%s) $(date ...) 4 or 8 times.
 One has to remember only the dates (times are optional) and then simply run the
one liner.
 The encryption software can be downloaded when one arrives at his destination.
 

Generate a hex key from a password? It seems like my site can do it:
http://fractallife247.com/test/hmac_cipher/ver_0_0_0_1?ct_hmac_cipher=2bf63f8ee90dfed997b115aa711600c45a8212a1e35f4f75ccfa36ee459b3fedd8b5f477ebb8871dd94025e7731f39cf7650f864fd6d5ce6908bb2609f96e81a413ccf40b33380a569155cb79612def387c76dd1ae436bcb4fb8c9b959be255708d020d559e07492ba24aae3705ba700a5d9c857418a0050d9ad5935efbfc36b895329cabeacbc7cefdee04834b4d392e50501c55587361bd6ca7337083fcd16ddf95d50072ea61cf2aaeb45d4d676abf93d39ad0a386399d55f2d0dba6be91521068f1120573e96aa1d81362e62f91bf88f63fe159175c13a1abec4184aae1cadfe2e18be27cac0fbefbae0c57cec531bc71e8a86d0f15a727e98bafe0239c5fd06a250e7f6
It encrypts a key using the default password. The key is generated using the same program. This example basically generates a key using the default password, then encrypts said key using a different password.
Everybody can decrypt the generated key because the ciphertext in the link uses the default password:
https://i.ibb.co/BybrYDw/image.png
The plaintext is:
A key:
f65952b125ba6860e21aef9c55e69e0612b153e5fd2599ac00b67945f9bec7563d5edf8bf9fa0db27aeb78b0c8f40f0a6a69b2cd720d59ecc73a01c1ccad0933cfe9e014dda35db6eaba760c9dbdff0f4ad24c5b702baab8e225189179b8bd