Best diffie-hellman software for free download

J2SSH Maverick is a lightweight professional SSH API for Java. The product is compatible for all versions of the Java Development Kit with support for SSH1, SSH2, SFTP and SCP. The product requires no external dependencies.

Features Include:
- Cross platform, 100% Java based API
- Support for both SSH protocols, SSH1 and SSH2
- No external dependencies, no JCE required!
- Small JAR sizes (148k minimum to support both protocols, 325k for complete feature set)
- Compatible with JDK1.1+ and J2ME (Java 2 Platform, Micro Edition)
- Password, Public key, Hostbased, and Keyboard Interactive authentication
- 3DES, DES & Blowfish ciphers
- Optional Twofish, AES & CAST ciphers
- Stateful decryption counter (SDCTR) mode cipher for AES
- SHA1, MD5 Message Authentication Codes (MACS)
- SFTP, SCP File Transfer protocols
- RSA, DSA public/private key file generation, in SSHTools, OpenSSH and SSH1 formats
- Supports reading of PuTTY and SSH.com public/private keys
- Port forwarding
- Public key subsystem
- X Forwarding
- ZLIB compression
- SSH2 custom channels
- HTTP, SOCKS 4 and SOCKS 5 proxy support
- diffie-hellman-group-exchange-sha1 Key Exchange

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Radmin Communication Server by Famatech is a new, secure solution for real-time corporate communications. It can also serve as a secure enterprise instant messaging tool, a solution for online conferencing, and a corporate multi-user Text and Voice chat for employees.
Radmin Communication Server uses a client-server structure. The server module is installed on each machine that is to generate a communication. This provides a connection for each Radmin Communication Client installed on the computers that will be receiving communications.
Text Chat options include private instant messaging, multi-user, real-time text chat conversations. Voice Chat options include private, real-time voice chat conversations (VoIP analog), multi-user, real-time voice chat conversations, conference mode with microphone queue, short text message (SMS) sending and customizable voice quality to save bandwidth and traffic.
Radmin CS does not use external servers for connections and offers wide administration opportunities, so no data can be intercepted. Radmin CS supports Windows NT/2000/XP/2003 user level security, so connections can be limited to specific users or user groups, Primary Domains, Trusted Domains or Active Directories. For user authentication and session key setups, a modified Diffie-Hellman exchange with a 2048-bit key size is used. All data are encrypted by AES with a 256-bit key size.

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