if I disconnect my pc will my BTC be safe

[BilalHIMITE]

if there is a trojan or a keylogger in your pc, of course they will steal your data.
so even if your pc was off if they have you private key, decrypted. they can stole your money.
but if it's encrypted it will not stop them but just delay them.
and the most of trojans or keyloggers cannot be detectd by the most AVs (i'm got some victims of my keylogger the detection of AVs ar just 3 anti-viruss that detect it)
and the most of hackers or data stollers just stole passwords (especially paypal , banks) and credit cards numbers but i don't think about bitcoin private keys.

[pooya87]

the important thing to remember is to keep the pc that has your wallet on, offline and never connect it to internet.
what i like to do, in order to secure my coins is to create an offline electrum wallet.
here a step by step guide that i bookmarked some time ago:
https://bitcointalk.org/index.php?topic=853288.0

[Amph]

if there is a trojan or a keylogger in your pc, of course they will steal your data.
so even if your pc was off if they have you private key, decrypted. they can stole your money.
but if it's encrypted it will not stop them but just delay them.
and the most of trojans or keyloggers cannot be detectd by the most AVs (i'm got some victims of my keylogger the detection of AVs ar just 3 anti-viruss that detect it)
and the most of hackers or data stollers just stole passwords (especially paypal , banks) and credit cards numbers but i don't think about bitcoin private keys.

well you need more than one antivirus, for example you can malwarebytes, also the free version of av isn't the same as the full version

anyway strong virus(like those that can hides themselves in any folder) are not a thing of everyday, it isn't that easy to be infected by those

[Lauda]

my ip is dynamic, i'm not worried about that, being a target or not, they still need to find a way to infect me, which mean that they need that i download something or click on something, almost impossible

i think if you are really careful and know what your are doing, you are the best antivirus of your desktop, but i agree that such thing isn't advisable, average joe don't have the patience for something like this, they can not manage their own security

Sorry, you think that you've got it figured out, but you don't. Opening a single email could be the ticket to your Bitcoin hell.

well you need more than one antivirus, for example you can malwarebytes, also the free version of av isn't the same as the full version

anyway strong virus(like those that can hides themselves in any folder) are not a thing of everyday, it isn't that easy to be infected by those

No. Having multiple antivirus software is a bad idea because they will counteract each other. They will start fighting over viruses, they will try to kill each other and sap your power. However, it is okay to have an AV and Malwarebytes.
Strong viruses aren't a thing of that you would encounter everyday, correct. However, this goes only for your average internet users.

-snip-
and the most of trojans or keyloggers cannot be detectd by the most AVs (i'm got some victims of my keylogger the detection of AVs ar just 3 anti-viruss that detect it)
and the most of hackers or data stollers just stole passwords (especially paypal , banks) and credit cards numbers but i don't think about bitcoin private keys.

You know that you can get your money back from Paypal or a bank? Good luck getting someone to send your Bitcoins back.

[Amph]

my ip is dynamic, i'm not worried about that, being a target or not, they still need to find a way to infect me, which mean that they need that i download something or click on something, almost impossible

i think if you are really careful and know what your are doing, you are the best antivirus of your desktop, but i agree that such thing isn't advisable, average joe don't have the patience for something like this, they can not manage their own security

Sorry, you think that you've got it figured out, but you don't. Opening a single email could be the ticket to your Bitcoin hell.

yeah i know, but i'm very careful everytime i open one, usually you need to download something there, also

No. Having multiple antivirus software is a bad idea because they will counteract each other. They will start fighting over viruses, they will try to kill each other and sap your power. However, it is okay to have an AV and Malwarebytes.
Strong viruses aren't a thing of that you would encounter everyday, correct. However, this goes only for your average internet users.

it's funny how you always want to contradict me  , but you are wrong on malwarebyte, it can be used without any problem, along with others antivirus

[LiteCoinGuy]

It's been connected to the internet, if I turn the internet off, is there a way my BTC can be stolen without physically taking my pc?

to be even more safe you can buy a hardware-wallet:

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

[syuhide]

if your pc is clean being connected or not will not make any difference, if you knwo that your pc is infected(usually something wrong happen in this case, like cpu usage too high, strange filename ecc...) then it is better to move your wallet in another storage(offline is better)

my point is that you can have a online safe computer, in my case i have a wallet that it is always online with some btc, no one has stole those bitcoin from my desktop ever, they are still here

it is just a matter of dealing well with security

the thing that i wanna say that if anyone has physical access to your pc/laptop then the scene can be different..
its better to keep your wallet in offline in some portable hard drives.

[(Lithium)]

if your pc is clean being connected or not will not make any difference, if you knwo that your pc is infected(usually something wrong happen in this case, like cpu usage too high, strange filename ecc...) then it is better to move your wallet in another storage(offline is better)

my point is that you can have a online safe computer, in my case i have a wallet that it is always online with some btc, no one has stole those bitcoin from my desktop ever, they are still here

it is just a matter of dealing well with security

the thing that i wanna say that if anyone has physical access to your pc/laptop then the scene can be different..
its better to keep your wallet in offline in some portable hard drives.

or you can write your private keys in some place that no one would expect to find them, so they would not be subject to hardware failures

[syuhide]

or you can write your private keys in some place that no one would expect to find them, so they would not be subject to hardware failures

yes transferring your private keys to another place will be the best idea..or you can store all your coins to deep freezer...

[Herbert2020]

or you can write your private keys in some place that no one would expect to find them, so they would not be subject to hardware failures

yes transferring your private keys to another place will be the best idea..or you can store all your coins to deep freezer...

it is better to sweep all your addresses into a new address that you create with your new wallet.
every wallet has this option to sweep addresses when you import, which means you send your coins to the new wallet instead of risking contaminating the new wallet.

[Lauda]

yeah i know, but i'm very careful everytime i open one, usually you need to download something there, also

That's good for you. Keep at it.

it's funny how you always want to contradict me  , but you are wrong on malwarebyte, it can be used without any problem, along with others antivirus

No. You're the one trying to be right all the time with false assumption, understanding and posting without backing up your words with facts/evidence.
How about actually reading my post before replying to me (hence the thread in meta)?

No. Having multiple antivirus software is a bad idea because they will counteract each other. They will start fighting over viruses, they will try to kill each other and sap your power. However, it is okay to have an AV and Malwarebytes.
-snip-

it is better to sweep all your addresses into a new address that you create with your new wallet.
every wallet has this option to sweep addresses when you import, which means you send your coins to the new wallet instead of risking contaminating the new wallet.

You should take this advice. Every time I've tried to move to a new wallet, I actually transfer everything to a single address (newly generated).

Another good option if you're willing to spend some money:

to be even more safe you can buy a hardware-wallet:

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

[BilalHIMITE]

my ip is dynamic, i'm not worried about that, being a target or not, they still need to find a way to infect me, which mean that they need that i download something or click on something, almost impossible
i think if you are really careful and know what your are doing, you are the best antivirus of your desktop, but i agree that such thing isn't advisable, average joe don't have the patience for something like this, they can not manage their own security

if you have 0.0001 btc of course your safe cause no one will work hard to stole your money.
but if it's 5 BTC even if your ip is dynamic or you have a cisco guard firewall. or DDos protection system or anything else.
the problem is your post,  this post got 500 views maybe anyone will try to get your ip address.
if a hacker know that he will get 5 BTC (1100$). you know!!

[Amph]

my ip is dynamic, i'm not worried about that, being a target or not, they still need to find a way to infect me, which mean that they need that i download something or click on something, almost impossible
i think if you are really careful and know what your are doing, you are the best antivirus of your desktop, but i agree that such thing isn't advisable, average joe don't have the patience for something like this, they can not manage their own security

if you have 0.0001 btc of course your safe cause no one will work hard to stole your money.
but if it's 5 BTC even if your ip is dynamic or you have a cisco guard firewall. or DDos protection system or anything else.
the problem is your post,  this post got 500 views maybe anyone will try to get your ip address.
if a hacker know that he will get 5 BTC (1100$). you know!!

those 5 btc are here since bitcoin was 1000(so there isn't even the excuse of "you are just not a good target", hacker has stole a much lower amount than that), and none has ever stole them, like i said they can't simply attack your desktop without your "permission"

[pooya87]

my ip is dynamic, i'm not worried about that, being a target or not, they still need to find a way to infect me, which mean that they need that i download something or click on something, almost impossible
i think if you are really careful and know what your are doing, you are the best antivirus of your desktop, but i agree that such thing isn't advisable, average joe don't have the patience for something like this, they can not manage their own security

if you have 0.0001 btc of course your safe cause no one will work hard to stole your money.
but if it's 5 BTC even if your ip is dynamic or you have a cisco guard firewall. or DDos protection system or anything else.
the problem is your post,  this post got 500 views maybe anyone will try to get your ip address.
if a hacker know that he will get 5 BTC (1100$). you know!!

those 5 btc are here since bitcoin was 1000(so there isn't even the excuse of "you are just not a good target", hacker has stole a much lower amount than that), and none has ever stole them, like i said they can't simply attack your desktop without your "permission"

i agree. of all the "my bitcoin was stolen" stories that i have heard so far, almost all of them was the person's fault. like clicking on a phishing email, opening a suspicious link like fake blockchain.info address, having keylogger, using Tor,...
all of these can be prevented by taking necessary precautions. like having a good and up to date antivirus or using offline wallets,...

[Muhammed Zakir]

my ip is dynamic, i'm not worried about that, being a target or not, they still need to find a way to infect me, which mean that they need that i download something or click on something, almost impossible
i think if you are really careful and know what your are doing, you are the best antivirus of your desktop, but i agree that such thing isn't advisable, average joe don't have the patience for something like this, they can not manage their own security

if you have 0.0001 btc of course your safe cause no one will work hard to stole your money.
but if it's 5 BTC even if your ip is dynamic or you have a cisco guard firewall. or DDos protection system or anything else.
the problem is your post,  this post got 500 views maybe anyone will try to get your ip address.
if a hacker know that he will get 5 BTC (1100$). you know!!

those 5 btc are here since bitcoin was 1000(so there isn't even the excuse of "you are just not a good target", hacker has stole a much lower amount than that), and none has ever stole them, like i said they can't simply attack your desktop without your "permission"

It is not hard for a malware to get into your computer without your permission.

i agree. of all the "my bitcoin was stolen" stories that i have heard so far, almost all of them was the person's fault. like clicking on a phishing email, opening a suspicious link like fake blockchain.info address, having keylogger, using Tor,...
all of these can be prevented by taking necessary precautions. like having a good and up to date antivirus or using offline wallets,...

Don't compare Blockchain.info. Bitcoins lost through Blockchain.info is very big and no, many of them were *not* due to users' faults.

[baristor]

depends on where u are storing your btc, if its on a pc - wallet , it will be safe as long as u reconnect ur pc, otherwise I Suggest u use an online wallet to store your cash and email encrypt it for extra protection! now days can even get mobile verification

[Muhammed Zakir]

depends on where u are storing your btc, if its on a pc - wallet , it will be safe as long as u reconnect ur pc,

I think you meant "safe as long as u don't reconnect ur pc". It can be safe even if he connects internet as long as he knows how to secure his computer from malware.

otherwise I Suggest u use an online wallet to store your cash and email encrypt it for extra protection! now days can even get mobile verification

Storing Bitcoins on an online wallet is worse than storing it in a local wallet.

[temroa]

i have seen a thing that is "NSA put virus to harddisks for reaching it from far away" its not about internetless pc but i just wanted to write

[Amph]

my ip is dynamic, i'm not worried about that, being a target or not, they still need to find a way to infect me, which mean that they need that i download something or click on something, almost impossible
i think if you are really careful and know what your are doing, you are the best antivirus of your desktop, but i agree that such thing isn't advisable, average joe don't have the patience for something like this, they can not manage their own security

if you have 0.0001 btc of course your safe cause no one will work hard to stole your money.
but if it's 5 BTC even if your ip is dynamic or you have a cisco guard firewall. or DDos protection system or anything else.
the problem is your post,  this post got 500 views maybe anyone will try to get your ip address.
if a hacker know that he will get 5 BTC (1100$). you know!!

those 5 btc are here since bitcoin was 1000(so there isn't even the excuse of "you are just not a good target", hacker has stole a much lower amount than that), and none has ever stole them, like i said they can't simply attack your desktop without your "permission"

It is not hard for a malware to get into your computer without your permission.

seeing how they are still here, i think it's easy to assume that it must be hard for them to violate my computer, simply visiting website is hardly any dangerous, unless you run some random script, and without downloading anything, i can't see how in the hell they could violate my machine

i'm actually interested about this, can a malicious user gain the control of your machine, without the need for him to send virus/trojan/malware/rat/rootkit/(website scrypt)ecc...and hoping that you click or install them or that you visit some obscure website?

i'm talking about a direct attack to your desktop, like a ddos, but with also the possibility for him to take control of your machine, i think not, but maybe i'm wrong

[pooya87]

Don't compare Blockchain.info. Bitcoins lost through Blockchain.info is very big and no, many of them were *not* due to users' faults.

if you are referring to the reusing of the "R values" by blockchain.info . i have to say, it could be easily avoided if the simple rule of "always use every address once" was followed, it could have been prevented.

i'm talking about a direct attack to your desktop, like a ddos, but with also the possibility for him to take control of your machine, i think not, but maybe i'm wrong

i have experienced a "TCP SYN Flood attack" which is a kind of DDoS attack. the attacker needs your IP to do this kind of attack AFAIK. besides i wasn't doing anything out of the ordinary.

i must add that the attack was simply blocked by my dear AntiVirus (Eset Smart Security) and i blocked the attacker's IP afterwards, just to be safe.