Users interested in Ultrasurf 13.1 generally download:
Ultrasurf is a program that enables you to protect your privacy online with anonymous surfing and browsing. The program hides your IP address, clears browsing history and cookies, it uses a strong end-to-end encryption to protect your data transfer from being seen by third parties.
UltraSurf is a hard one to block at ISP level because it uses a peer-to-peer technology and several obfuscation techniques, making it challenging for network operators to identify associated traffic. UltraSurf encrypts data transmitted over the Internet between peers and is particularly gifted when it comes to circumvent security limitations.
UltraSurf is a free software which enables users inside countries with heavy Internet censorship to visit any public web sites in the world safely and freely. Users in countries without internet censorship also use it to protect their internet privacy and security.