Bitcoin Forum

It is possible can hack my web wallet?

Yes, nothing is 100% safe.

IMHO a local wallet is safer than an online wallet. That is unless you have a habit of getting infected easily. If you have an old laptop use that just for your wallet. They dont need much and you can mess with your main machine all you want. An old smartphone can work as well.

Of course all of this can be attacked as well, but the chances that you are targeted are smaller and you can keep your wallet offline until you use it if you use a dedicated device for this.

I think it is possible if someone knows your wallet private key so easy he will take your address balance

Posibble, blockchain.info wallet is the one of web wallet service which have a trouble and the users already there are have been lost their coins on that wallet. If you won't to happens this, you should use cold wallet or desktop wallet.

We could tell you more if you telll us what web wallet.  You should use cold storage but some are better then others.

The worst in my eyes are the one's who keep large amounts in gambling sites and exchanges.  Those two are not meant for long term storage.

there aren't any online wallet services that are meant for long term holding. people who leave their coins online on exchanges and such are too lazy to store their coins offline in a secure manner, or they simply don't care. eventually they will care but it will be a very costly lesson once a certain service gets hacked or suffer from an inside job.

use a hardware wallet:

https://bitcointalk.org/index.php?topic=899253.0

Of course they can get hacked. Do not use web wallets! The Web wallet service will go offline tomorrow or will get hacked and you are screwed.

At least use lite wallets if you can't afford hardware wallets or it is to much of the hassle to use paper wallets. Electrum and Multibit are two good ones.

Reformat your computer, keep it clean (pay attention where you are going when online), install Multibit or Electrum, and make a backup of the wallet and you should be much safer than with the online wallet.
 
Cheers!

Almost everything can be hackes, the cuestion is if it´s probable it wil happen to you

If you have 2FA enabled, then I'd say your web wallet is pretty sure,
But if you wanna be sure look for a hardware wallet or paperwallets. Trezor is a pretty famous hardware wallet. and bitaddress.org for paper

no I don't think anyone can hack bloackchain.info or maybe I can be wrong but it has a milletry grade security as it says and it is also pritty harder to manage that wallet as compared to the mobile wallets are more smooth

In theory, my computer is not safe. But in reality no none knows that I have coins in my computer and very few people undersand what bitcoin is.

The price is awesome.. i need cheapest one..  ;D

the problem with webwallet is that they have double holes, one on your end and on their end server, with  local wallet there is ony one possible security hole, which is your computer being infected

for this reason a local hot wallet is vastly better than a web wallet, and with the right measurements it can be considered as safe as a cold wallet, but you need a dedicated PC for your bitcoin client

2FA does not immediately mean that it is safe. There was once when coinbase had a vulnerability on the 2FA login. The other potential loophole is that all your funds would be stored on a central wallet hence if the central wallet gets hacked, your coins would be gone whether 2FA is enabled or not.
FTFY.
It is possible to hack servers if anyone has access to it. I would say that it would be significantly harder to hack in a scenario which they have patched everything properly even if the server gets accessed since the private keys are all encryped. However, I would recommend against blockchain.info given their current state which is unreliable.

A raspberry Pi combined with electrum would be one of the cheapest choice for a offline hardware wallet.

Why not? Even if you are in complete control of your desktop wallet and maintain full security, it is still hackable. The question here is the risk level, whether high or low and whether you or the website owner have done enough to prevent it from attack.

If I am not mistaken web wallets are not that secure like we expect it to be. So yes, it can be hacked. Evwn the 2FA can be cracked if the hacker knows what he is doing. Paper wallet is the best option if you want security. Just be sure that you backup your wallet.

Look at it this way op. If someone can build something, then it is possible someone else can un build it. Nothing is 100% hack proof. It's what hacking means.

The most secure systems will have 2 or 3 factors of authentication, and even then... Somewhere, someone is working double hard to outsmart it.

If you are worried about security you should get a hardware wallet. Still not totally impenatrable but probably your best bet right now

Both of them pose a same risk to the user, that is weak RNG. Weak RNG allows the creation of less random private keys. When a transaction is created, the transaction is signed with values R and S. If "R" is reused twice, the attacker can compute the private key easily. Blockchain.info has this happened several time, last year when they pushed an update and this year with the android wallet. Android wallets were known to generate weak keys several years ago and Bitcoin were stolen.

Although no one knows in reality, but on the internet your coins is not safe if you keep on web wallet or exchanger, especially with exchanger which don't give you priv key.
Even bc.i wallet is can hacked although you have priv key, that's why bitcoin.org removed bc.i from their list bitcoin wallet, you should move to cold wallet.

Yes, of course. everything can be hacked. so if you have a web wallet you should always have a very complicated password and 2FA enabled. If you can use 4 or 5FA I suggest you use it.

Any idea to use 5FA ???

I think better move to cold wallet. I got bad experience with web wallet, especially bc.i, i set up my pass pretty complicated and 2FA enabled, but at least my coins move without my permission and i lost my coins there.

In crypto world any kind of hack is possible, you can't be safe 100% against an hacking attack

Yes, absolutely possible your web wallet can be hacked if you have weak password,no 2fa setup,download software or apps from untrustworthy websites etc..