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I'm looking for a software to encrypt and decrypt a file in Windows. It should be:

  • simple (not too many features, should be able to just encrypt and decrypt it back)
  • light-weight/portable (just few hundred KBs if possible)
  • available as a single binary (executable file).
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    I use AESCrypt (you right click on files and an option to encrypt/decrypt is in the context menu) – markasoftware Sep 24 '14 at 0:05
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    I guess, the question follows the guideline now. Can you guys please care to upvote it now? :) – Dilip Raj Baral Sep 24 '14 at 13:59
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    I did (almost half a year after you posted it). It is, indeed, a perfectly cromulent question now – Mawg Jan 22 '15 at 8:57
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    @Mawg Thanks :) It would be great if at least two others did too. – Dilip Raj Baral Jan 22 '15 at 18:47
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I would suggest taking a look at gpg4usb:

  • Not as small as a few kB but still only a 23 MB download
  • Portable so you don't have to install to the machine in question just unzip and use.
  • Runs on both Windows and Linux (Mac under development and in Alpha at the time of writing Sept 2014)
  • Free (Libra & FLOSS)
  • Public/Private Key based i.e. the recipient does not have the key that was used to encrypt the file.
  • Compatible with GPG so for people who already have that installed, regardless of platform, they can receive and decrypt the file, (given the key).
  • GUI based so easy to use.

Screen Shot of Encrypting a file

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