Seed phrase: what exactly it restores and why it cannot be changed

A seed phrase is not a password to a wallet but the wallet itself in human-readable form. A master key is derived from it mathematically, the whole tree of private keys is derived from that master key, and from those keys come the addresses where the funds are held. That is why it cannot be changed, reset or recovered through customer support: whoever enters this sequence of words into any compatible application controls the assets. The application, the device and the PIN code are consumables and can be replaced. The seed phrase cannot.

What exactly is stored in these words

The words are not chosen at random but drawn from a fixed standard wordlist, in which each word encodes a segment of random data. The length of the list is standardised: there is a short version and a doubled one that is more resistant to brute-force guessing. The last word carries a checksum, which is why a wallet can tell a typo from a correct phrase and will not quietly open the "wrong" wallet because of a single mistyped letter.

Two consequences that are most often overlooked:

• The order of the words is part of the secret. The same set of words in a different order produces a different wallet (or fails the checksum). The phrase must be written down with each position numbered.
• Words in the wordlist can be told apart by their first letters. Writing down the opening letters of each word is enough for recovery to succeed. This is useful when you are engraving the phrase on metal and space is limited.

A separate element is the additional passphrase that some wallets offer on top of the seed phrase. It does not "protect" the seed phrase; it defines a different wallet: the same seed phrase with and without it gives two independent sets of addresses. A forgotten passphrase means losing the funds just as irreversibly as a lost seed phrase, and it must be recorded separately from the words, otherwise it serves no purpose.

Why "changing the password" does not work here

A bank or a broker has an intermediary that keeps a record showing that you are the owner. A password there is a way of proving your identity to that intermediary, and that proof can be reissued. In self-custody of crypto there is no intermediary: the right to dispose of an asset is proven by a signature made with the private key, and by nothing else. There is no authority that could recognise your new signature as legitimate and the old one as compromised.

Hence the practical rule: if the seed phrase could have been seen by anyone — photographed, entered on a website, typed on a computer, printed, saved in notes or in the cloud — it is not "changed". You generate a new wallet with a new phrase on a clean device and move the funds there. The old one is treated as public.

How this differs from record-keeping on the Russian market

The contrast is useful if you came to crypto from the stock exchange. Shares you own through a broker are recorded in a depository: losing access to the app does not cancel your title to the security — there is a register, a contract and a procedure for restoring access. The same applies to coupons and payouts: the right to receive a coupon on OFZ or a dividend on a share is tied to an entry in the accounting system, not to a file on your phone. The market parameters of such instruments — quotes, multiples, record dates — are shown on the site in the sections on stocks and in the payout calendar.

A wallet with a seed phrase has no equivalent: the accounting system is the blockchain, and the only record that you are the owner is your key. Hence storage requirements that bear no comparison with those for a password to a personal account.

How to store it so that you neither lose it nor give it away

The two threats pull in opposite directions: loss and leakage. Measures against one strengthen the other, so the solution is always a compromise.

Step 1. Write it down on a physical medium — paper kept in a dry place, or better still, metal. Not in a password manager, not in a photo gallery, not in a messenger chat "to yourself".

Step 2. Keep copies in different places, so that one fire, flood or search cannot destroy or expose everything at once. For large sums, secret-sharing schemes are used in which each part is useless on its own — but such schemes demand discipline and documentation, otherwise your heirs will not be able to reassemble the phrase.

Step 3. Test recovery in advance: reset the device, or take a second one, and restore the wallet from your record, making sure the addresses match. An untested backup is an assumption, not a backup.

Step 4. Think about inheritance. Instructions on where the parts are kept and how to assemble them are needed separately from the parts themselves.

A fair disclaimer

The site's data cover Russian exchange-traded instruments — stocks, bonds, funds, financial statements and event calendars; the database contains no metrics for wallets or blockchain addresses, so this article contains no numerical values as a matter of principle, not out of caution. The legal status of owning crypto assets and the taxation of transactions with them in Russia are regulated separately from securities-market legislation, and for precise wording you should go to the primary source rather than to an overview article. The terminology used in this piece can be looked up in the glossary.