Challenger is described as 'Software for the encoding of files, folders and drives. For the installation and for the execution simple user rights suffice. Thereby the program is mobil usable on an USB flash drive too' and is a Disk Encryption tool in the security & privacy category. There are more than 50 alternatives to Challenger for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Challenger alternative is TrueCrypt, which is free. Other great apps like Challenger are GnuPG, Kleopatra, Axcrypt and AES Crypt.
[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]
TrueCrypt is the most popular Windows, Mac & Linux alternative to Challenger.
TrueCrypt is the most popular free alternative to Challenger.
GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications.
GnuPG is the most popular Open Source alternative to Challenger.
Offers robust file encryption with AES-256 for premium and AES-128 for free users, integrated password manager, intuitive interface, support for cloud storage, multilingual options, offline security, group management tools, and secure file deletion features.
Axcrypt is the most popular Android, iPhone & iPad alternative to Challenger.
Easily encrypt files with user-friendly software using the powerful AES standard for security on Windows, macOS, and Linux, featuring robust 256-bit encryption for safeguarding sensitive data from unauthorized access, ideal for secure data storage, email transmission, and internet uploads.
AES Crypt is the most popular Android Tablet alternative to Challenger.
AES Crypt is the most popular commercial alternative to Challenger.
Multron File Guardian - A File Encrypter/Decrypter With Many Encryption Algorithm.
BitLocker Drive Encryption is a data protection feature that integrates with the operating system and addresses the threats of data theft or exposure from lost, stolen, or inappropriately decommissioned computers.
A simple right-click, you can encrypt files in seconds - without any prior technical knowledge.
Encrypto lets you encrypt files before sending them to friends or coworkers. Just drop a file into Encrypto, set a password, and then send it however you normally would — but this time with added security. It’s free for both Mac and Windows.
Samsung Secure Folder lets you put to use the power of defence-grade Samsung Knox security platform to protect your files with a private, encrypted space on your phone. Apps and data moved to Secure Folder are sandboxed separately on the device and gain an additional layer of...
FreeOTFE is a free, open source, "on-the-fly" (OTFE) disk encryption program for PCs running MS Windows and Windows Mobile PDAs (FreeOTFE4PDA).
Platform-independent password-based authenticated encryption of files & folders.
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