Abstract: A system and method for securely processing identity information. For example, in one embodiment of the invention, a first user is registered on an identity service with one or more identification (ID) codes and a token. In response to a query from a second user to connect with the first user, a query signature is generated using the one or more ID codes and token of the first and second users, and a timestamp. The query signature is usable by network services to authenticate communication between the first and second users on the network over a specified period of time. In another embodiment, user ID codes and tokens are cached on mobile devices and/or a system cache to improve performance. The validity of the cached data is determined by calculating a fingerprint which, in one embodiment, is a hash of the ID code, token and a timestamp.

Abstract: A system and method for secure instant messaging are described. For example, in one embodiment, a first user identifies a second user for an instant messaging session with the ID code of the second user. The first user is provided with network information for the second user and a public key associated with the second user. The first user encrypts an instant message using the public key of the second user and a private key. In one embodiment, the first user encrypts the content of the instant message (e.g., any text and/or attachments) using the public key of the second user and signs the content using the private key of the first user. The encrypted message is transmitted from the first user to the second user. The second user decrypts the instant message using the second user's private key and verifies the signature with the first user's public key.

Abstract: A system and method for secure instant messaging are described. For example, in one embodiment, a first user identifies a second user for an instant messaging session with the ID code of the second user. The first user is provided with network information for the second user and a public key associated with the second user. The first user encrypts an instant message using the public key of the second user and a private key. In one embodiment, the first user encrypts the content of the instant message (e.g., any text and/or attachments) using the public key of the second user and signs the content using the private key of the first user. The encrypted message is transmitted from the first user to the second user. The second user decrypts the instant message using the second user's private key and verifies the signature with the first user's public key.

Abstract: A system and method for securely processing identity information. For example, in one embodiment of the invention, a first user is registered on an identity service with one or more identification (ID) codes and a token. In response to a query from a second user to connect with the first user, a query signature is generated using the one or more ID codes and token of the first and second users, and a timestamp. The query signature is usable by network services to authenticate communication between the first and second users on the network over a specified period of time. In another embodiment, user ID codes and tokens are cached on mobile devices and/or a system cache to improve performance. The validity of the cached data is determined by calculating a fingerprint which, in one embodiment, is a hash of the ID code, token and a timestamp.