I think you misunderstood me.
Sending 20 single transactions with 1 input / 1 output each, costs 3-4 times more than sending a single transaction with 1 input / 20 outputs.

If you play with the site linked by Lucius:
1 input / 1 output: ~138 vbytes
20x 1 input / 1 output: ~2760 vbytes
1 input / 20 outputs: ~784 vbytes




Correct.
And the size is determined by the amount of inputs/outputs and the address type (are you using legacy, multisig, segwit, ..).

The overall fee you pay depends on the fee rate (sat/B or sat/vB) and the actual size (bytes or virtual bytes).
Fee [sat] = fee rate [sat/size] * size

A single transactions with 1 input and 20 outputs is at roughly ~800 vByte.
20 Transactions with 1 input and 1 output each, are roughly 3-4 times larger in size. And therefore the fee would also be 3-4 times larger given you use the same fee rate.

Monero combines multiple pearls of cryptography, i.e. zero knowledge proofs and blind signatures to achieve the privacy preserving properties it has.
There are a few easier to understand articles on how monero works on the internet.

You don't need to doubt anything, it is mathematically proven.




Addresses do not exist on a technical level in bitcoin.
And the blockchain is what makes it final and tamper-proof.

How are you going to solve this if not with a tamper-proof form of storage (e.g. blockchain) ?




Encrypted for the recipient?
How will it be verified? Who sees the amount? Who checks whether the amount sent is indeed the amount received?
Who makes sure that i am not sending 1 coin to an address which receives 2? Where do the checks take place?



Signing and verifying? Like a chain of signatures?
You could define a "coin" as a chain of signatures (e.g. signed transactions), and then.. you would basically have bitcoin again.




It won't.
You can not create a trustless and decentralized system which is fully private or anonymous without advanced cryptography.
That's what zero knowledge proofs, blind signatures, etc.. are for.

You can not take the concept of bitcoin, change a few things without having any idea on how this can work (i.e. without having an idea on how "coins" and transactions are defined, verified, etc..) and expect to have a private/anonymous coin.

No offense here, but if you don't fully(!) understand how monero works, you'll never be able to create a concept for an anonymous coin.

Saying there is "no need" to upgrade an operating system which is no longer supported, is a bold (and dumb) statement..
And since you are already advising him to not upgrade his OS, there is no reason to use a bootable USB to run electrum instead of simply using a different wallet.

@OP
The best would be to upgrade your OS. You don't want to be using an outdated OS.
Don't listen to the people recommending you to not upgrade your OS. They literally have no clue what they are talking about.

Using a VPN for privacy is in most cases a bad idea.
Depending on the country you live in, it rather harms your privacy, since you are shifting the trust from your ISP towards the VPN provider.

You just have to estimate who you trust more with your data, your ISP or a VPN provider.
If you are not living in a legal vacuum (and not in the USA), the ISP most likely is the safer bet. You need to acknowledge that VPN provider make money with your data. And not only the free ones.

Additionally, a compromised tor exit node does not automatically mean that you are being tracked. This is a misconception some user on this forum have.
A compromised exit nodes enables attacks to track people via HTTP, but does not mean that you privacy is automatically compromised.

Definitely not. Especially not if it exceeds a specific (small) amount.
If someone gains access to their cold wallet, the funds are gone.



The best exchange to keep your coins on, is no exchange.

To be honestly, you wouldn't need the screenshot to actually get that information.
Since his address is publicly known and one of those two outputs is very low compared to the other one, you can fairly confident say which most likely is the change.
Obviously this screenshot confirms it to you, but nothing more.

@OP
Don't worry too much.
The way you described it, there isn't much privacy you are compromising with this screenshot.
Most of the information which can be extracted from it, is already publicly known (or can be guessed).

Please answer my questions:


And further, what exactly is the error you are encountering? Any error message?
You literally gave us 0 information.

Did you notice the pinned thread called [READ BEFORE POSTING] Tech Support Help Request Format ?
You might want to read it..

Probably not the latter one..


What tool are you talking about? Did you download the tool and are you running it correctly?
Or did you just copy/paste a random command you found somewhere?

Which thread? You need to give us more information..


Also, did you create a backup (or better: several backups) before trying to recover your wallet file?
And the most important question: Did you buy that wallet file? If you indeed did, you got scammed.

GPG is not an algorithm.
So, it really depends on the cipher used.

Usually, for backups, you want to use symmetric ciphers (e.g. AES or CAST5, both were/are standards used by gpg under linux).

Encrypting a file (or data, generally) asymmetrically is rarely needed. What you usually do is to encrypt the data/file with a symmetric cipher and encrypt that symmetric key (which is way shorter than an asymmetric one) with an asymmetric cipher.
Symmetric crypto is way faster than asymmetric one.

To at least partially answer your question, the security of keys compared (by the NIST):

(source)

Bitcoin is using 256 bit EC keys. So, using AES with 128 bit keys is roughly as secure as EC with 256 bit keys.
And both are considered secure by the NIST (and the rest of the world). (Source: https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-131Ar2.pdf)


Now, to finally answer your question: It depends on the algorithm. 128 bit AES is secure. 128 bit RSA is not.
You want to have a bit strength of at least 128 bit and you are fine.


However, the encryption is not everything you need to worry about. A few additional things would be:

• Where is the decryption key stored?
• Is your PC definitely not compromised upon encryption?
• How do you generate the key (TRNG, dice)?
• How has your seed been generated (TRNG)?

P.s. Even quantum computers won't break AES 128 bit. Fully functional quantum computers will reduce the search space from 2¹²⁸ to 2⁶⁴ which is still far away from being broken / insecure.

I really don't feel sorry for this guy at all.
Storing that amount on an online wallet and not checking the signature when installing a wallet is more than just careless. It is extremely stupid.

And blaming anyone except himself just shows how irrational people can be.




There are no automatic updates.
Visit the official website (https://electrum.org) and download the latest version. Then, before installing it, verify the PGP signature. There is a How-to on electrum.org.

Verifying the signature ensures that you are using the version which has been uploaded by the developer and not a malicious one (e.g. from someone who might have hijacked the web server).

If there is no vulnerability to exploit, yes.
That's why a backup is always important.



Well.. or you would have made a 2nd backup.
Since you created the backup.. why do you believe it is wrong? Without having any numbers, i'd believe this only happens in very rare cases.



It is not just about 2FA.
Ever heard of Mt. Gox?



I was thinking about using a multimeter to measure the current flowing.. but your suggestion sounds a lot better 

You can run the AppImage the same way you would run an installed version, for example by adding an alias at the end of the file .bashrc:

Faucets are worthless.
It really is not worth the time. You would be better off getting a job and buying bitcoin. Saves you tons of time and electricity.

Other than that, there are no "free crypto" sites. If there are, they definitely are a scam.
No one gives away free money. You always pay for that. It is just, that sometimes it's not that obvious (e.g. with your data / privacy).

Yes.



No, you just need a device to connect your nano s to via USB.
This can be your laptop, desktop system or an android mobile via USB OTG.



Yes.
The nano x does not only have a bluetooth interface, but a USB interface too.

What argument are you calling it with?
Do you provide the salt? If yes, how do you do that?


Use:


Providing the source coude would make it easier for us tho.

Well, are you sure that it doesn't turn on? Maybe only the screen is broken, but the device itself does still work?
Either way, hard to say.

I still wouldn't send in my nano (if this is even possible) without completely wiping it or moving my funds to a new wallet (with a new seed).




Yes, all of that would be a bad idea.
The best would be to simply wait until you are back.

If you really don't want to wait that long, and you have a person you fully trust, let them encrypt the seed using public key crypto. Then any communication channel is fine.
Or you simply use a messenger which does that for your (e.g. signal). But keep in mind that both of your devices have to be clean. Yours and the device from the person you absolutely trust. If one of them is compromised, your seed is compromised. That's the huge risk.


Can't you just wait a week or two until you are back at home?

You would be better off using the latest version now, instead of later when you absolutely have to.
Keeping your software up-to-date generally is the recommended way to have all current features, more security and overall less bugs.

This doesn't only apply to electrum, but to any other software too. Especially your OS and every software handling sensitive information.

I, personally, would always wipe the device before sending it in to be repaired.
And if that isn't possible, i'd first create a new seed and move all funds there before sending it in. Just to be on the safe side.

Just check your mnemonic first. Either on a new nano or on an airgapped PC.
If it works, you are fine and can wipe the nano before sending it in to repair. If they turn out to be wrong, then you'll need to hope for the best when sending it in to be repaired.

Either way.. first check your mnemonic code.

What problems do you have using TOR?
Is there anything specific or are you just asking for settings? It sounds like something doesn't work properly? And if so, something more concrete would be useful



This is personal preference.
The AppImage file is larger since it includes all dependencies. It is a trade-off between storage space and cross system compatibility.
Both are fine. There is nothing wrong with any of them.