We tried to reach the Encryptdrop owners, but their Site righteoustech.com is gone.
Encryptdrop, as the name itself implies, is a program for encrypting and decryptipting files.
We saved the latest non-shareware version of this program (V9B),
which still keeps different methods of encryption, for example: Serpent, Twofish, Cast-256 and AES.
It’s a small powerful program for Win32 that makes it’s job perfectly and has a nice interface.
The Encryptdrop programmers never released it for Open Source,
we just hope that they change their mind and continue the development of this program.
Here is direct download of it and a skin made by us for the interface included.
Akamai Chief Security Officer, Andy Ellis, shares A Short History Of Cryptography :
Before the modern era, cryptography was concerned solely with message confidentiality (i.e., encryption)—conversion of messages from a comprehensible form into an incomprehensible one and back again at the other end, rendering it unreadable by interceptors or eavesdroppers without secret knowledge (namely the key needed for decryption of that message).