Can nonce be reused?

Can nonce be reused?

1 Answer. A nonce can be reused as long as a (key, nonce) tuple is not reused. You’re right that reusing a nonce with the same key would result in a catastrophic loss of privacy with a stream cipher like XSalsa20 .

What is nonce in Android?

A nonce is a random number that uniquely identifies each attestation request. Each nonce is valid for a short time period, after which the Attestation Server fails any request made using that nonce. This is to avoid a replay attack that could allow an attacker to reuse a past attestation result.

What happens to a dropped transaction?

TL;DR, the assets and the gas fee in a dropped transaction are not deducted from the sender’s wallet address balance and are reverted back to sender. Since the dropped transaction is not processed and registered into the blockchain, its nonce is now taken over and is used by the replacement transaction.

What is nonce position?

Nonce is the number of transactions the source account has made so far starting from 0, not from 1, position is the number of this transaction (mined) inside the block.

Who created the word nonce?

The term nonce word in this sense is due to James Murray, the first editor of the Oxford English Dictionary.

Which apps use SafetyNet?

While that won’t stop all Android apps from running on rooted devices, many popular apps do rely on SafetyNet, including:

• Netflix.
• Snapchat.
• Pokemon Go.
• Mario Run.
• Android Pay.
• Many banking apps.

How do I install a SafetyNet?

Steps to be follow:

1. Generate API key. a) Open Google Cloud Console .
2. Add SafetyNet dependency in your project compile ‘com.google.android.gms:play-services-safetynet:10.2.1’
3. Add API and permission to manifest (specially in activity)
4. Set connection to Google Play Service.
5. Set safetynet api request.
6. Verify response.

What is a dropped transaction?

If there is any interruption to the connection during the final stages of communication, the transaction will not register properly. This is known as a dropped transaction. Dropped transactions aren’t unusual and Moneris is often able to correct the issue automatically without having to involve the merchant.

What does dropped and replaced mean?

“Dropped & Replaced” means the transaction has been replaced by a new one and the new one has been validated by the network (more info here : https://info.etherscan.com/transaction-dropped-replaced/).

What happens when a transaction nonce is too low?

One weakness of the account paradigm is that in order to prevent replay attacks, every transaction must have a “nonce”, such that the account keeps track of the nonces used and only accepts a transaction if its nonce is 1 after the last nonce used. There have been some questions on this site about transactions nonces that are too low.

Can a gas transaction have the same nonce?

No two transactions can have the same nonce. If they do, the transaction with the higher gas price will usually be confirmed, and the other transaction will be rejected. You can use this to your advantage to try to cancel your stuck transaction.

Why is my transaction stuck in numerical nonce order?

Transactions must be confirmed in numerical nonce order, which is why your other transactions can’t get through until your stuck transaction completes. And don’t hate on the nonce – it helps avoid double spending, which would cause much bigger problems than your transaction traffic jam.