Encrypting

BIGSPEED Peer-to-Peer SDK
Free - BIGSPEED Computing Inc.

BigSpeed Peer-to-Peer SDK is a set of two COM components (Agent and Hub) that lets you set up a virtual private peer-to-peer (P2P) network for secure file sharing and messaging. The security is provided in two different modes: symmetric encryption with shared secret key and asymmetric encryption with 1024-bit public/private keys.

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CommuniCrypt Mail
Free - CommuniCrypt Software

E-mail client with strongest asymmetric Public-Key-Encryption(RSAES-OAEP). This client is fully featured for receiving/sending mails via POP3/SMTP. With the integrated SMTP engine you do not need a SMTP server, program is trying to send the mail directly to recipient's mail server(if supported)! Encryption is optional to enable. Integrated file-/attachment encryption(RSA up to 7120 bit or AES 256) See www.communicrypt.com for full feature list.

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iOpus Secure Email Attachments - Encrypted and Self-extracting
Free - iOpus Software GmbH

In just a few moments, you can create an encrypted, compressed (ZIP) attachment with your sensitive documents. Ideal for sending information by email or making secure backups. Thanks to compression, iOpus SEA packages are up to 95 % smaller than the original files, saving time and money for e-mail transmission. The recipient requires no special software, because iOpus SEA packages decode themselves after the password is entered.

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