33 votes

Alternatives to TrueCrypt?

VeraCrypt is an actively developed and maintained fork of TrueCrypt. Pros: Supported operating systems: Linux, Windows, OS X. Open Source (Apache License 2.0). Essentially identical interface to ...
  • 431
5 votes

Client-side encryption for cloud storage

There is a free and basic tool called CryptSync which is something like a cross between 7Zip (for compression and encryption) and SynchToy (for scheduled synch). You can synch compressed and ...
  • 151
5 votes
Accepted

Encrypt my external hard disk (Linux + OS X + Windows)

Until a yearor two back, the definitive answer would have been TrueCrypt. I still use it myself, but, as it is no longer actively developed, you might want to choose one of the forks, based on its ...
5 votes
Accepted

Software which can decrypt into 2 different files depending on the password?

i assume you are talking about Plausible deniability or to be more concrete Deniable encryption? well, read a bit further to https://www.privacytools.io/#encrypt and there is VeraCrypt recommended... ...
  • 1,636
4 votes
Accepted

App to encrypt and store all my photos online?

boxcryptor Boxcryptor protects your files in the cloud no matter if you use Dropbox, Google Drive, Microsoft OneDrive, SugarSync, Box.net, or any other major cloud storage provider. It also supports ...
4 votes

Crossplatform encrypted file container alt for TrueCrypt?

VeraCrypt is a free, open source disk encryption software for Windows, Mac OS X and Linux. VeraCrypt can create a virtual encrypted disk within a file or encrypt a partition or storage device. ...
  • 1,590
4 votes
Accepted

Portable encryption for USB flash drives

In the free arena, Veracrypt is still an excellent choice and is being maintained with both patches and improvements, and is cross-platform. In the paid area, software like Checkpoint can do (for ...
4 votes

Java equivalent to Ruby's SecureRandom?

tl;dr Integer.toHexString( new SecureRandom().nextInt() ) bd594090 JRuby Run your Ruby code on a JVM with JRuby. java.security.SecureRandom Java includes SecureRandom, a cryptographically ...
3 votes

What software could deny access to a USB Drive, with an encryption password?

The default windows Bitlocker program which is available in windows vista and up is just fine see a detailed tutorial here http://www.howtogeek.com/192894/how-to-set-up-bitlocker-encryption-on-...
3 votes

Is there a lightweight library that can perform RSA-2048 encryption for an embedded application?

Yes, LibTomCrypt. LibTomCrypt implements most common cryptographic primitives (and many uncommon ones), including RSA (PKCS#1 v1.5, PSS and OAEP modes). The code is clean and portable C, so you can ...
3 votes

End-to-end encrypted calendar software

To the best of my knowledge, no good end-to-end encrypted calendar is available at the moment (Dec 2016). The only option I'm familiar with is with a Swedish private email company called https://www....
  • 31
3 votes

bare metal crypto library

I'm going to assume that you only need the most standard capabilities and nothing fancy, so at most things like standard authenticated encryption primitives and thelike. No secret sharing, no format ...
  • 273
3 votes

Alternatives to TrueCrypt?

I would also check out LibreCrypt, LibreCrypt (Open Source) Transparent on-the-fly disk encryption for Windows. LUKS compatible. (formerly DoxBox) Features Easy to use, with a 'wizard' for creating ...
  • 7,594
3 votes

Video/audio chat programs that offer end-to-end encryption that do not let the service know of the content?

tox: Tox began a few years ago, in the wake of Edward Snowden's leaks regarding NSA spying activity. The idea was to create an instant messaging protocol that ran without any kind of central ...
  • 840
3 votes

On-the-fly encryption solution for external drive

Western Digital Passport external USB drives use hardware encryption, no need to use software. Here's a 3TB one from Amazon for $120usd. But beware, if the drive breaks you won't be able to get the ...
  • 218
3 votes
Accepted

Encrypted external disk, with no need to enter password each time

You can use LUKS encryption for your external hard drive. Anytime you plug in the drive, Ubuntu automonts the drive and directly asks for the password. Showing you an option when to forget it: ...
  • 774
3 votes

Git files encryption to protect the source code from theft

Have a look at Keybase app. The feature includes built-in encrypted chat and signed git hosting. It is free, open source and available for macOS, iOS, Android, Linux, and Windows. Run the app, then ...
  • 2,957
2 votes

Alternatives to TrueCrypt?

I'm using free version of Cryptic Disk, which supports TrueCrypt containers, and offers a lot of more features such as advanced UI, hotkeys, mount/unmount scripts, etc.
  • 121
2 votes

Is there a symmetric encryption GUI available for Ubuntu/Linux?

EncryptPad Open source and free. It encrypts binary (non-textual) files (second screenshot below) but works even better with text because it has a built-in editor. It edits text without saving ...
  • 156
2 votes

Encrypt then sync your files to ANY cloud storage as secured offsite backup?

It could be well worth taking a look at git-annex - you mark the remote storage for one of several types of encryption and it will sync your files as and when. Currently, August 2015, built in ...
  • 31.3k
2 votes

Software for determining known text cipher type and key

Detection and identification While it is possible to identify a cryptographic algorithm by way of cipher bit sequences, you should know that it can be difficult and (more important) reverse-...
  • 1,524
2 votes

Portable, no-admin, no-install, Win/Linux USB encryption/decryption on the go

The way you want the program to work is deeply flawed concerning protection of the files, as they would stay decrypted on the USB drive until the encryption program is run again. Instead, the way to ...
  • 671
2 votes
Accepted

Software tool for practical XOR comparisons (ASCII and HEX)

There is Cryptool, an open source project with the goal of teaching cryptography. I am using Cryptool 2. It can e.g. calculate XOR results as shown below. Unfortunately it doesn't really work well ...
2 votes

Alternative to UnRAR.dll

How about SharpCompress? It's a library that would allow you to unrar rar files. It's open source and can be found on GitHub. SharpCompress SharpCompress is a compression library for .NET/Mono/...
  • 7,594
2 votes
Accepted

Is there a secure group chat available today?

Now as for the security side of things, I cannot openly advise you on this. Here is a brief list of programs you can use. I will not go into details about protocols etc.; I'll leave this all for you ...
  • 1,462
2 votes

End-to-end encrypted calendar software

Disclaimer: I'm the developer of the product mentioned in this answer. I did not post earlier as I misread the question to be absolutely limited to open source. If you're searching for a solution for ...
2 votes

Open source self-hosted encrypted chat system

Use ChatSecure, run up your own XMPP server, OTR protocol. Downside here is that it does not meet your preferences: Is not available natively through web; OTR uses 128-bit long keys. Alterntaviely ...
  • 1,462
2 votes

Client-side encryption for cloud storage

Maybe PanBox. Their Github page claims that You can download the manual for PanBox from www.panbox.org, which fits for the Windows, Linux and Android version. The download page references GPLed ...
2 votes
Accepted

Backup program for encrypted data for linux

i'm not 100% sure if it hits all your requirement but Déjà Dup is definitively worth a look: it uses duplicity/rsync as backend use local, external or network-storage (ssh, ftp, WebDAV, smb, etc.) ...
  • 1,636
2 votes

Software which can decrypt into 2 different files depending on the password?

Not quite what you are looking for but you could use Steganography to hide your really sensitive data in the picture of the cat, (possibly after encrypting the text data itself), and then encrypt the ...
  • 31.3k

Only top scored, non community-wiki answers of a minimum length are eligible