31 votes
Accepted

If I saved my view key and spend key can I recover my wallet if my mnemonic seed is lost?

Yes, it is possible to restore your account with just the view and spend keys. monero-wallet-cli has the --generate-from-keys <name> option, which will create a wallet with the given name, and ...
user avatar
  • 34.6k
22 votes
Accepted

How do I use my MyMonero wallet via the Monero Core GUI?

The MyMonero wallets use a different type of mnemonic: 13 words instead of 25 words. The Monero Core GUI (or the CLI) doesn't support restoring a wallet from a 13 word mnemonic seed. Therefore, you'll ...
user avatar
  • 4,489
15 votes
Accepted

private spend key versus mnemonic seed

Thanks to deterministic key derivation, the private spend key is an alternate representation of the mnemonic seed. Both the mnemonic seed and private spend key can be used to derive all other keys ...
user avatar
  • 4,546
15 votes

What are some ways I can disguise my mnemonic seed?

From fluffyponyza here: Due to the nature of the key you can write it as part of something else - eg. write a fake love letter to your wife so that the 24 words on the left hand side are your key ...
user avatar
14 votes
Accepted

Will Monero mnemonic seeds need to be converted to BIP 39 for standardization reasons?

To answer if it will be converted is really opinion-based as I'm not aware of anybody working on it. To answer if there's an actual need is a harder one, but let's try. Trezor support is on the way, ...
user avatar
  • 19.8k
13 votes
Accepted

What is the checksum at the end of a mnemonic seed?

General The purpose of a checksum is exactly what the word means - to "check" something, and the simplest form of it is to check the sum. In general, checksum is a way to let you know if you got the ...
user avatar
  • 19.8k
12 votes
Accepted

Creating a Monero wallet with D20 dice

The most straightforward way is probably to generate 256 bits of entropy (a fair 20 sided dice will give you a bit more than 4 bits per roll, so make it 64 rolls), and record all these throws in the ...
user avatar
  • 34.6k
11 votes
Accepted

Shamir's Secret Sharing for cold storage of a Monero wallet

There is no support for SSS in simplewallet. This would require some amount of new modexp code to be added (unless a variant of it can be made using EC cryptography, but I'm not aware of any). So the ...
user avatar
  • 34.6k
11 votes
Accepted

What are the most secure options for backing up your mnemonic seed?

You could also scrypt your paper wallet. Then use base64 to get the encrypted data in a printable format. This way somebody stealing it will still need a password to get the keys or mnemonic seed and ...
user avatar
  • 226
11 votes

My dog ate the USB key with 10000 monero wallet. Are they lost forever?

When you create a new wallet, the software gives you a "mnemonic seed". It's a list of words that can be used to regenerate your wallet file and rescan the block chain to find your transactions. By ...
user avatar
  • 3,304
10 votes
Accepted

mnemonic seed order

The number of ways to arrange n distinct objects is simply n! (n factorial), so for 13 unique words (I don't believe they're allowed to have repeats repeats are allowed, but the probability of getting ...
user avatar
  • 4,373
10 votes
Accepted

How can I recover a wallet using the mnemonic seed?

Right now there are two primary ways to do so: Go to the folder containing monero-wallet-cli and run "./monero-wallet-cli --restore-deterministic-wallet", entering your mnemonic seed when prompted. ...
user avatar
10 votes

Why did monero-wallet-cli restore the same wallet with different mnemonic seeds?

TL;DR first is completely random seed, 2nd is the "normalized" seed, and they're both valid and resolve to the same wallet. As long as you know the method to go from mnemonic to the actual private key,...
user avatar
  • 19.8k
10 votes
Accepted

Can you choose the mnemonic seed to create a wallet?

I was wondering if you can create a wallet by selecting these 25 words yourself and going from there. Yes. But you actually select 24 words and compute the last one (25th is the checksum, and it will ...
user avatar
  • 19.8k
9 votes

Creating a Monero wallet with D20 dice

I personally would not trust a run of the mill D20 as the vast majority simply aren't made to roll in a genuinely random manner http://www.1000d4.com/2013/02/14/how-true-are-your-d20s/ http://www....
user avatar
9 votes
Accepted

Can my mnemonic seed be hex data instead of something ASCII based?

When recovering by mnemonic seed, you must actually type your mnemonic seed (or at least the first 3 letters of each word, 4 in some languages). You are able to recover a wallet with hex data but in a ...
user avatar
  • 6,533
9 votes
Accepted

Mymonero and monero-wallet seed

Yes, it's less secure because it's 128bits of entropy in the 13-word seed vs 256bits of entropy in the 25-word seed. However, it's considered safe enough as it would again take an impossible* amount ...
user avatar
  • 19.8k
9 votes
Accepted

My dog ate the USB key with 10000 monero wallet. Are they lost forever?

A Monero wallet can be recovered in a few ways: Recovering from the mnemonic seed that you should have written down when you made the wallet. See more instructions here. Recovering from the view key ...
user avatar
  • 8,704
8 votes

If I saved my view key and spend key can I recover my wallet if my mnemonic seed is lost?

You can recover the wallet with this simplewallet command: --generate-from-keys
user avatar
  • 6,533
8 votes
Accepted

Why one word is found two times in each seed?

Yes, it's because the last word is a checksum word which will always be picked from one of the words in the mnemonic. See here for more details. In fact, one word could occur even more than 2 times. ...
user avatar
  • 19.8k
7 votes
Accepted

Normalized seed

At the beginning, when we designed the mnemonic seed mechanism, the spec was to have a seed derived from the mnemonic, hash it to produce the spend key, and hash it again to produce the view key. ...
user avatar
  • 5,079
7 votes

Can my mnemonic seed be hex data instead of something ASCII based?

You can restore a wallet/account with the private keys as hexadecimal data, rather than their mnemonic form, using either the --generate-from-keys or --generate-from-json options to simplewallet. See ...
user avatar
  • 34.6k
7 votes

Does entropy vary depending on the language of my mnemonic seeds?

I will answer your second question first: Yes, a longer word list would lead to increased entropy and a shorter list would lead to decreased entropy. Monero avoids this problem by relying on an ...
user avatar
  • 545
7 votes
Accepted

Why does md5sum of .keys file change with each restore from mnemonic seed?

The encryption used by the keys file is randomized. It uses a key derived from your password, and an IV (initialization vector) which is randomly selected. This is designed to prevent an adversary ...
user avatar
  • 34.6k
7 votes
Accepted

What are some ways I can disguise my mnemonic seed?

You can do various things. Only the words' prefix matters (3 letter prefix for English, 4 letter prefix for all other languages I think), so you can modify the words (ie, if your seed has "marble", ...
user avatar
  • 34.6k
7 votes

What are some ways I can disguise my mnemonic seed?

https://xmr.llcoins.net/ has some ways to add security measures to a mnemonic seed. This means even at attacker thinks they found your seed, they need to try and break the additional security. ...
user avatar
  • 3,120
7 votes

What are the most secure options for backing up your mnemonic seed?

The best option I found is: http://cryptosteel.com I bought few of them. This is by far the best option in my opinion.
user avatar
  • 1,271
7 votes

With Monero firmware loaded on a Trezor, how does one create private spend keys from the BIP 39 seed words supplied during a Trezor's configuration?

The initial answer below, doing things the Monero way, originated from How does one convert the Trezor seed to a simplewallet seed and vice versa. I followed this URL's recommendations using the ...
user avatar
  • 1,566
6 votes

If I saved my view key and spend key can I recover my wallet if my mnemonic seed is lost?

I tested simplewallet’s --generate-from-json option, using only the spendkey and the viewkey, and as expected, it worked. However, from Luigi's address test page, I learnt that the "Private View Key" ...
user avatar
  • 4,489

Only top scored, non community-wiki answers of a minimum length are eligible