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I need to send 10 accounts login data via email, if i send it to a mac user a make an encrypted .dmg file, but as far as I know windows needs a third party app to open .dmg files.

Is it possible to make a .iso with password protection? Is .rar or .zip file password protection safe?

al404IT
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  • What data? do you mean username + password. If you send this in a password protected file, how are you sending the password to that file? – daniel Mar 31 '17 at 09:35
  • Is Excel file with 10 account inside. I can send password to open the file via phone. I edited my question – al404IT Mar 31 '17 at 09:36
  • Yea that sounds OK, a password protected .zip should be ok. I think a .7z can work on Mac and Windows. – daniel Mar 31 '17 at 09:38
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    You are essentially asking about how to encrypt files. That you want to sent this encrypted files then with email is just an unimportant detail. Thus possible duplicate of [Are password-protected ZIP files secure?](https://security.stackexchange.com/questions/35818/are-password-protected-zip-files-secure), [How secure is 7z encryption?](https://security.stackexchange.com/questions/100650/how-secure-is-7z-encryption) and various others. – Steffen Ullrich Mar 31 '17 at 09:41

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It as everytime depends on the password too. A password protected .zip file should be fine. Another option would be to create a vera crypt file you can send via E-Mail if its small enough , too.

Dr3xler
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  • There are different types of zip encriptions and some of them are **not** fine at all! – Josef Mar 31 '17 at 10:29
  • Wasn't sure about that , thanks for the comment. But truecrypt files should work – Dr3xler Mar 31 '17 at 10:30
  • when given the choice I would chose something like rar or 7z, one of the compression files that have been shown to be hard to brake. Even better would be something like pgp / gpg but thats a whole different toolchain. – LvB Mar 31 '17 at 11:30