Questions tagged [ethereum]

Ethereum is a decentralized platform to run apps on a custom built blockchain.

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ssl\tls public key vs ethereum blockchain public key [closed]

In a ssl/tls, the public key for a domain is included in the ssl/tls certificate that your computer downloaded and stored locally. In the ethereum blockchain ecosystem, the public key is derived from ...
EmilyJ's user avatar
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1 vote
3 answers

Proving that a file existed at a time

How do I acquire the means to prove in the future that I had possission of a file now, without relying on the integrity of a single entity? (I believe one way of doing it would be to put the file ...
Callaeschrus's user avatar
1 vote
2 answers

How is "Smart Contract" security different?

I am learning smart contract programming on Ethereum (using Solidity) and realizing that security is highly important here. Why? Because of 2 reasons: they deal with high-stake financial transactions, ...
shivams's user avatar
  • 221
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Ways to encrypt data that will be available to specific clients [closed]

I want to store information on the blockchain, but some part of it is private and must be available to selected clients (for example, users who belong to a common company) How can this be done? The ...
Wen Chiang's user avatar
1 vote
4 answers

Where to store an important private key?

I run LEMP stack on Ubuntu 18.04. I need to sign / verify transactions for Ethereum real-time. Where can I store the private key for it? Is storing it in .env good enough? It just seems super ...
evening's user avatar
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Are eavesdropping attacks possible on Ledger Nano S hardware wallets?

Regarding the Ledger Nano S hardware wallet for cryptocurrencies, I've heard it claimed that the private keys for the wallet are securely stored on the physical device and protected even if the PC is ...
Simon East's user avatar
4 votes
1 answer

Why is it a bad idea to store my ethereum keyfile in my Google Drive / Dropbox etc

I just bought some Ethereum and I'm in the process of moving my ethereum off my exchange into a wallet. Now the recommendation around the web seems to be to get your key file (which contains your ...
Wills McLeod's user avatar
5 votes
3 answers

Is blockchain security dependent on number of transactions in time?

I have a basic understanding of how blockchain technologies works. I know that in depends on the ledger where are transactions recorded and can be effectivelly verified. No one should be able to ...
user1563721's user avatar
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2 votes
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Is the Ethereum blockchain truly a tamper-proof way to deploy distributed applications?

The Ethereum website says that it provides a "cryptographically secure, decentralized, tamper-proof network" on which applications written in the Solidity contract language could be deployed. (https://...
bmiller59's user avatar
4 votes
2 answers

Sandbox escape of an isolated turing complete language?

Ethereum's Solidity documentation states: The Ethereum Virtual Machine or EVM is the runtime environment for smart contracts in Ethereum. It is not only sandboxed but actually completely isolated, ...
Steve Ellis's user avatar