kenny1999 Posted April 15 Share Posted April 15 (edited) Hi. Is there any such apps that I can send a file to someone but he can only read the file with the password that I provide to him? It's like zip files encrypted with passwords on PC. I know that I can do it by sharing on Google drive but is there more convenient way? The data of my file is mostly text, no picture. Edited April 15 by kenny1999 Link to comment Share on other sites More sharing options...
swansont Posted April 15 Share Posted April 15 I’ve had documents sent to me that were password protected. Microsoft docs and pdf files Link to comment Share on other sites More sharing options...
Sensei Posted April 15 Share Posted April 15 1 hour ago, kenny1999 said: Is there any such apps that I can send a file to someone but he can only read the file with the password that I provide to him? Obviously. But the question is whether you or anyone should trust them. 1 hour ago, kenny1999 said: he can only read the file with the password that I provide to him? ..how will you do that? Obviously not by e-mail, FB, social medias, not by voice by phone.. 1 hour ago, kenny1999 said: It's like zip files encrypted with passwords on PC. Which anyone can decrypt with the ZIP password cracking tool for Linux: https://www.kali.org/tools/fcrackzip/ 1 hour ago, kenny1999 said: I know that I can do it by sharing on Google drive but is there more convenient way? it is the silliest idea to do.. and has nothing to do with "convenience".. unless "convenient" means "total insecurity".. Then what for to password protect it in the first place? 1 hour ago, kenny1999 said: The data of my file is mostly text, no picture. in some/typical cases, an image is harder to decipher than plain text.. 41 minutes ago, swansont said: I’ve had documents sent to me that were password protected. Microsoft docs and pdf files Protecting against interception of information is one side of the coin. The second side is whether the data that was sent came from a legitimate source.. https://en.wikipedia.org/wiki/Digital_signature https://en.wikipedia.org/wiki/Pretty_Good_Privacy Link to comment Share on other sites More sharing options...
swansont Posted April 15 Share Posted April 15 30 minutes ago, Sensei said: Protecting against interception of information is one side of the coin. The second side is whether the data that was sent came from a legitimate source. The second side was not brought up in the OP, which was simply asking if there are ways to password-protect files. Link to comment Share on other sites More sharing options...
Sensei Posted April 15 Share Posted April 15 5 minutes ago, swansont said: which was simply asking if there are ways to password-protect files. ..extremely capacious range of knowledge probed to be reduced to a few sentences that will be a farce of an answer.. some people spend live on it.. 7zip is known for using AES-256. https://en.wikipedia.org/wiki/Advanced_Encryption_Standard But what really matters is what block mode.. https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation See the image encoded with ECB block mode: https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Electronic_codebook_(ECB) The lack of an initialization vector can have bad consequences.. Link to comment Share on other sites More sharing options...
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