![]() a base64 your data after encryption or before decryption aes-256-cbc is a good way of using a AES cipher It uses a Key Derivation Function, lacking it would make bruteforcing password a lot easier.įor decrypting use: openssl enc -aes-256-cbc -a -d -in .enc -out -pbkdf2 -iter 1000000 -md sha512 Building on stefano-palazzo answer: openssl enc -aes-256-cbc -a -e -in -out oupput.enc -pbkdf2 -iter 1000000 -md sha512 Shown below is a basic encrypt / decrypt openssl command that uses AES-128: echo precious-content | openssl aes-128-cbc -a -salt -k echo U2FsdGVkX1+K6tvItr9eEI4圜4nZPK8b6o4fc0DR/Vzh7HqpE96se8Fu/BhM314z | openssl aes-128-cbc -a -d -salt -k recent option added to openssl since OpenSSL 1.1.0. This allows you to " easily" and " conveniently" encrypt a file/script without having to satisfy any package or module requirement on every system you intend to use the script on or run several complex and confusing incantations of openssl commands. That zip file will contain the encrypted (and executable if it is a script) version of your file. All you have to do is paste the script to the site, and a zip file will be generated for you. How can you "quickly and easily" encrypt a file using AES-128?Ī site like uses openssl AES-128 quite intensely to encrypt shell scripts and then makes the encrypted copies of the scripts executable. If you intend to use your file or script across different platforms, I strongly recommend using AES-128 because this is available everywhere. But others such as AIX 5.3 do not (i think HP-UX as well). However, I would caution against using AES-256 just because it is not available in all versions of openssl on some platforms. Basically, openssl is really the easiest way to go about encrypting a file or script. Use these sites with dev tools / inspector and check if they send anything before typing in your strong password.Ī lot of the suggestions I would have made have already been put forth in this thread. Warning: I have checked that these sites don't send your password to the server, but that can change at any time. (this at least check for common passwords).(this doesn't take into account any dictionary attacks!).You can use this site to get a sense of how good your password is: This is not an encryption key, it is not limited to 32 bytes! If you're going to transfer files with someone else, your shared secret should be very strong. These are the ciphers modes you have available (only counting AES): aes-128-cbc ← this is okay For normal use, I recommend aes 256 in CBC mode. Note that you have a choice of ciphers and modes of operation. U2FsdGVkX192dXI7yHGs/4Ed+圎C3ejXFINKO6Hufnc= Verifying - enter aes-256-cbc encryption password: It'll look like this: stefano:~$ openssl aes-256-cbc -in attack-plan.txt -a This way, you can paste the ciphertext in an email message, for example. You can get openssl to base64-encode the message by using the -a switch on both encryption and decryption. Openssl aes-256-cbc -d -in message.enc -out plain-text.txt Openssl aes-256-cbc -in attack-plan.txt -out message.enc you can't just use encryption to communicate securely) For many types of security, encryption is simply not enough (e.g.Additionally, this method doesn't authenticate the ciphertext, which means an attacker can modify or corrupt the contents without you noticing. ![]() As was pointed out in the comments, this method uses a naive key derivation function, so your password needs to be superlatively good in order for you to have a chance of being secure.Please note: You can use this to hide birthday-gift-ideas.txt from your roommate, but don't expect it to be secure against a determined attacker! If you want very simple platform independent encryption, you can use openssl. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |