I'm a long term user of 1Password 4 and am looking to upgrade to a subscription as I've bought two new computers: Surface Pro and MacBook Pro and I need to sync the data between them.
I've read your whitepaper and would like some assistance.
I understand that the secret key is there to protect my data in the event that 1Password's servers get breached but I also understand that if I lose the secret key then I'm locked out of my data for good.
I'd like to keep it printed out in a couple of places but I don't want it in plaintext. I know that somebody finding the secret key would also need my master password but I'm a cautious guy.
Obviously the exact scheme I devise will be kept secret but would something like this work?
Secret Key: ASWWYB-798JRY-LJVD4-23DC2-86TVM-H43EB
Obscured Key: BTYYBE-800LUB-MKXF7-34FE5-97UXP-I55GE
I've removed the "A3" prefix because that'd allow somebody to more easily break the code.
Each letter is a shift upwards using 11,22,33 as the key or 11,22,3 (in a five character group).
As the secret key is random would this type of substitution withstand cryptanalysis?
(I realise if the secret key were a dictionary word then it could be easily broken by looking at vowel patterns and letter frequency)