I could have done the same with electrum, but I chose iancoleman. Is RNG strong enough with a site's javascript? How should I be aware of RNG? I mean, how can I know if it's strong or weak?
Everything about iamcoleman is open source and it is highly recommended. Iamcoleman make use of 128 bits to 256 bits of entropy to generate seed phrase using a open source codes which the 128 bits is even secure enough and safe to use. You have nothing to worry about, it is as secure as it is BIP39 standard using cryptographic secure pseudo random number generator and open source. 
Topic: Concern about RNG - page 2. (Read 577 times)
Iancoleman's site uses the same entropy source as bitaddress, which is Crypto.getrandomvalues(). Not to be confused with math.random which isn't a CSPRNG. It should provide similar entropy levels as it does gather extra entropy from the OS. There really isn't a way to ensure entropy, just ensuring that iancoleman is getting the entropy from a secure source is sufficient.
Around a year ago I had earnt some bitcoins which I sent them to a cold storage address with the mindset of keeping them long term. I recently read about RNG and its weaknesses and I'd like you to tell me your opinion about the way I did it.
I could have done the same with electrum, but I chose iancoleman. Is RNG strong enough with a site's javascript? How should I be aware of RNG? I mean, how can I know if it's strong or weak?
- I formatted a laptop and installed windows 7.
- I downloaded the iancoleman website as an html file.
- I opened it with firefox and then clicked generate.
- Then I wrote the mnemonic on a piece of paper and closed the browser.
I could have done the same with electrum, but I chose iancoleman. Is RNG strong enough with a site's javascript? How should I be aware of RNG? I mean, how can I know if it's strong or weak?
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