Private messaging, private sharing, and private networking. Sign up for a free account and start sending encrypted messages using iSign's Dynamic Public Key Infrastructure platform. In addition to your account, you will also get a USERNAME@USignIn.com email address. Your_Unique_Name@USignIn.com is running out fast.PRIVACY AND SECURITYWhat really separates USignIn from the rest is that messages are encrypted with our patent-pending Dynamic PKI encryption algorithm. Compliment that with our Biometric Signature verification algorithm, only the recipients can open and read the encrypted messages.BIOMETRIC SIGNATURE SIGN INYou can quickly and securely sign into your account by using your finger to sign your signature on the screen. Our patented short-loop biometric signature verification system learns your signature over time. Enrolling your signature takes less than 1 minute and only requires 4 signatures.