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5 votes
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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 ...
Mawg's user avatar
  • 9,048
5 votes
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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... ...
DJCrashdummy's user avatar
  • 1,658
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 ...
Ad Astm's user avatar
  • 151
5 votes
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free chat app with end-to-end encryption operating on Android and iPhone

Signal is another example of such app, which is commonly used. encrypts communication end-to-end it's free has Android and iPhone support group chats are supported etc. No web app (which Telegram ...
Destroy666's user avatar
  • 2,066
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. ...
karel's user avatar
  • 1,636
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 ...
Basil Bourque's user avatar
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....
Fredric's user avatar
  • 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 ...
SEJPM's user avatar
  • 273
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 ...
agc's user avatar
  • 856
3 votes
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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: ...
pLumo's user avatar
  • 784
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 ...
kenorb's user avatar
  • 3,133
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 ...
DankyNanky's user avatar
  • 1,522
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 ...
evpo's user avatar
  • 156
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 ...
Frederick Nord's user avatar
2 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 ...
Bulrush's user avatar
  • 218
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.) ...
DJCrashdummy's user avatar
  • 1,658
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 ...
D. Steinmetz's user avatar
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 ...
Steve Barnes's user avatar
  • 31.7k
2 votes

Remote file system that's encrypted on the client side

A simple option is EncFS, a mature "fuse" (filesystem in user-space) package available in Linux. For MacOSX there is a version about which I know nothing but seems to be well-received. It encrypts ...
meuh's user avatar
  • 613
2 votes
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Folder Encryption Software

If you are not married to Google Drive, look into SpiderOak. Its client encrypts files locally on your PC before uploading & decrypts on download. The SpiderOak team don't have any access to ...
Mawg's user avatar
  • 9,048
2 votes

What's the easiest secure way to encrypt a string with my own password on Linux?

Gpg (GNU Privacy Guard) is a OpenPGP implementation. There are several frontend applications, although I never tried any of them; I prefer the command line. To encrypt: gpg --symmetric --armor --...
Gonzalo Matheu's user avatar
2 votes

Simple folder encryption software

For simpler alternative to VeraCrypt you could use AxCrypt. It's simple, yet powerful and open-source, too. You could even just right-click to encrypt files/folders you want to encrypt, or making ...
Bagas Sanjaya's user avatar
2 votes
Accepted

What encryption software for long-term archival purposes (Linux + Cygwin & CLI)?

I just want to finish this Q&A with an actual accepted solution. I have written POSIX shell scripts available on GitHub using openssl for both encryption and decryption of my files. So far they ...
Vlastimil Burián's user avatar
2 votes
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File-Level Encryption

Kruptos2 Kruptos2 coins the following as their product descriptor: Kruptos 2 Professional is an easy to use file encryption program that uses 256-bit encryption to password protect your private ...
David Sims's user avatar
2 votes

What are my options to encrypt a file before writing it on Python?

First off, avoid 3DES encryption. It exists only as a stop-gap created because of the panic after regular DES was broken but before people had any reasonable alternative. It's only marginally more ...
Austin Hemmelgarn's user avatar
2 votes

Git file encryption to support file/folder based permission to protect the source code from theft

The encryption of git repository is designed to protect files from the theft from 3rd parties (e.g. when hosted on external servers such as GitHub or S3 Bucket, or by using Keybase), not from the ...
kenorb's user avatar
  • 3,133
2 votes

Is there any cloud service has end to end encryption plus binary diff sync?

To get end-to-end encryption it is inevitable to install a piece of software on your client. Such tools exist and often work with more than one cloud. I would recommend to have a look at Boxcryptor, ...
martinstoeckli's user avatar
2 votes
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Windows tool to protect a text file with sensitive data

Difference between AES-256 and OpenPGP First, I want to clarify that AES-256 and OpenPGP are not mutually exclusive. It's simpler to look at OpenPGP as wrapper for data encrypted with AES-256 ...
evpo's user avatar
  • 156
2 votes

OS agnostic solution for encrypting USB flash drives?

Veracrypt has clients for Windows, Linux, and macos, I'm pretty sure it can run as a "portable" app in most of them. And it's FOSS, so even if "the software manufacturer could stop supporting it at ...
Xen2050's user avatar
  • 410
2 votes

Simple encryption app

GPG (free replacement for PGP) has clients for Windows, macOS, Linux, android, iphone... virtually every operating system used in the last two decades. Just search the OS's software repositories / app ...
Xen2050's user avatar
  • 410

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