Although it poses it's own connectivity concerns. And there's many better ways to encrypt data - but the better options also involve key distribution challenges that can add time and cost concerns.
As a quick way to package and share some data that you don't want to make completely public - it's better than nothing, and it's sometimes the only common denominator you can work out. For anything high-risk, I'd find a better option. This is one of those cases where security is limited by usability and human intent. The archive manager has no way of telling whether or not the file you modified was meant to be encrypted in the first place. Essentially this is a social engineering attack, in that you tricked the user into believing that the original file was in place.
And where security is truly important, use strong encryption such as Pretty Good Privacy instead of the relatively weak standard encryption provided by zipfile utilities. Known weak encryption should be removed from the utility to avoid a false sense of security, but that's another story. It's not secure in the sense that you can't depend on the integrity of the zip file. Confidentiality is still in order since you can't access the file contents only the file-names.
This drawback in zip has been discussed before, personally I always use rar just because of this problem. Another workaround would be signing the zip file with PGP. In addition to the risks you have already pointed, IMHO one of the biggest problems with compression tools is related to the use of temporary folders to store the uncompressed files.
As the input files can be of arbitrary size, the uncompressed output files might not fit in RAM. A temporary output folder often the OS's default is used. So it does not matter how strong the encryption algorithm is if you forget to properly shred the temporary folders each time you unzip a psw-protected file. Most tools do not automatically clean the output directory nor warn the user about it.
Same thing when compressing: you should make sure to shred the original file. If I were to use the a general definition fo Secure to mean that it enforces Privacy, Authentication, Integrity and Non-Repudiation, I would say its is not secure on a number of counts.
But as the password protection on an Encrypted ZIP file intends to only provide Privacy disallowing the viewing of the content of a file except by intended parties I would say that it does do its job. The official. ZIP format specification does allow for hiding the list of file names but not number of files , as well as hiding metadata such as the original file size and CRC of the original file.
But you can't use WinZip or Info-Zip to do that. Additionally, integrity in the official. ZIP specification is provided through the use of one or more digital signatures in addition to the encryption.
My personal recommendation, though, is to avoid passwords, and instead use public keys. Key derivation functions are constantly getting faster, and I don't believe any vendor has even tried to keep up. If you have an unencrypted version of one of the files in a password protected zip you can use a known-plaintext attack to gain the password for all of the other files.
So the bottom line is, unless there is a vulnerability or back door in the encrypting code, it is as secure as your pass phrase is resistant to brute force attacks. There are various sites on the Internet where you can prototype the scheme you intend to use, to check roughly how long it would take to crack. Do not use WHAT you intend to use. Anything anyone can gain physical access to, is crackable, given enough time. However, you can have practical security if the cost and or time required to gain access to the information exceeds its likely value.
Unless it is something like financial information, there is often a big difference between what is valuable to a hacker, and what is valuable to you. A hacker is not likely to be willing to spend much time, and certainly not money, to gain access to something that doesn't have a convincingly high probability of containing something of value to him.
Not everything that is password protected can be hacked by brute force attacks. However, zip files can be cracked by brute force. Other systems have checks in place, like for example, lock out after three attempts, passkey verifications etc. I have heard about ways bywhich password protected zipped files can be cracked.
But in reality, there have been hundreds of thousands of people who are already using 7Zip. Several Redditors will back it up and other forum sites too. There are lots of speculations and questions that people have.
One of these questions still points to the earlier question, is 7Zip safe? As mentioned earlier, 7Zip is totally safe. On top of that, what sets it apart from the competition is its smooth and basic looking interface. Nothing to brag or the need to be showy. It is straightforward and easy to understand. Some other benefits include:. If you like something more than the simple user interface, just press F9. The 7z will transform into a dual-pane file manager.
Files can be verified effortlessly on your PC. No matter what I do my parents deny me saying it could be unsafe. From my research on the internet I can safely say this is a virus, the application installs tracking software on your computer and installs unwanted software. So, yes this is an innocent looking application that tries to trick people into downloading it.
I suggest you trust your parents for this one. To safely download games, go to the game's original website and not a free download site, as those have a very high chance of containing a virus. If you are unsure about doing this, try looking up reviews and information regarding that specific game.
Not Helpful 4 Helpful 7. Include your email address to get a message when this question is answered. Use your common sense - could it be simpler? Helpful 1 Not Helpful 1. Helpful 1 Not Helpful 0. Type the name of the file into a search engine such as Google or Yahoo! Try to get yourself a decent anti-virus program on your computer.
Norton, AVG and Avast! Even if you just get the free version, it's worth having a defense against a multitude of threats. Type the name of the website on a WHOIS site and it will find you lots of details that help you decide whether you can trust your download. Helpful 3 Not Helpful 0. If you receive an E-mail from an unknown sender with a file attached, delete it immediately.
That has 'virus' written all over it. Helpful 2 Not Helpful 0. Virtual Machines or sandbox programs such as Sandboxie can provide a safe way to test files. Try an add-on, such as VTzilla. It can scan files before you download them and can also scan links. Try this: Open command prompt.
The type the command: ping www. If you use Kaspersky, it is a great idea scanning the file with a virus check before running it - just to be extra sure that your computer isn't at stake! Submit a Tip All tip submissions are carefully reviewed before being published. If you downloaded something suspicious and ran it, download and install an appropriate program to find any threats on your computer.
Avast, AVG, or Malwarebytes are good and free programs. If you encrypt the files using the zipping program, the file names will still be visible to Gmail or anyone opening the. If you encrypt the. Theres also some email that will tell you a password to an attached zip file, which you have to input, to open. Zip files with passwords cannot be scanned by anti-malware as they are considered encrypted.
Not completely true. The contents of the password protected zipped files cannot be read, but the listing of files that are within the zip file CAN be seen. Double zipping hides the file names. Depending on the program used: 7-zip, for example, offers the option to encrypt file names. Unfortunately that option may not be compatible with the program used to unzip the file at the other end. REAL programmers type tar -cvfz archive. Do Not Use any of these examples lol. I like your approach, though I might not necessarily insist on phone key exchange only.
Is there really any risk in opening a zip file to see the contents? Is it possible for the zip file itself to actually install the virus if opened? I would have thought not, but could the. Technically, no, opening a zip will not install a virus. Yes, but when checking zipped files received for malware or viruses with Malwarebytes, SuperAntiSpyware or your anti-virus program, which do you check? The zipped folder itself or the contents after unzipping it??? You scan the. Some anti-malware programs give you an option to scan inside archives.
This option will scan both the. Because I deal with two banks, I always laugh when I get emails from other banks. Others claim to be invoices, bills, etc. It is a bit disappointing that Hotmail is letting so many of these through, given that it does scan messages for viruses. I have had one or two containing infected macros for Word documents, indicating the value of not allowing MS Word to open macros from the Web without permission. What can I do if I opened a. I did a search on what my next steps are to protect myself after opening a.
What do I do now? Are you suspecting that you got a virus? They all have to be temporarily extracted to memory to scan the true string of bits.
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