Establishing a direct connection between two devices

1. A method comprising:

by a first computing device, receiving a connection request from a second computing device, the connection request comprising an invitation to establish a social-networking connection;

by the first computing device, displaying a message indicating the received invitation to establish the social-networking connection;

by the first computing device, after receiving user confirmation via a manual input that the connection request is authentic, establishing a direct wireless connection with the second computing device;

by the first computing device after the direct wireless connection is established, exchanging social-networking information with the second computing device using the direct wireless connection;

by the first computing device, in response to determining that the first computing device does not currently have a network connection, storing at least a portion of the social-networking information exchanged between the first and second computing devices in one or more memory devices of the first computing device; and

by the first computing device, in response to detecting an available network connection:

connecting to the available network connection; and

sending, via the available network connection, the stored portion of the social-networking information to a computing device of a social-networking system.

2. The method of claim 1 , wherein the direct wireless connection comprises:

WI-FI DIRECT;

BLUETOOTH;

BLUETOOTH LOW ENERGY (BLE); or

near-field communication (NFC).

3. The method of claim 1 , wherein the social-networking information exchanged between the first and second computing devices comprises:

a friend request;

contact information;

one or more files;

one or more applications; or

social-networking information.

4. The method of claim 1 , wherein the available network connection comprises:

cellular; or

WI-FI.

5. The method of claim 1 , wherein the exchange of social-networking information with the second computing device comprises the first computing device sending information to or receiving information from the second computing device in an encrypted form.

6. The method of claim 1 , wherein establishing the direct wireless connection with the second computing device comprises:

broadcasting, by the second computing device, a connection request comprising a nickname, alias, first name, image, or user identifier;

receiving, by the first computing device, the connection request from the second computing device; and

accepting, by a first user, the connection request.

7. The method of claim 1 , wherein establishing the direct wireless connection with the second computing device comprises using a one-way authentication protocol comprising:

the first computing device sending encrypted information to the second computing device; and

the second computing device decrypting the encrypted information.

8. The method of claim 1 , wherein establishing the direct wireless connection with the second computing device comprises using a two-way authentication protocol comprising:

the first computing device sending first encrypted information to the second computing device;

the second computing device sending second encrypted information to the first computing device;

the second computing device decrypting the first encrypted information; and

the first computing device decrypting the second encrypted information.

9. The method of claim 1 , wherein the message indicating the received invitation to establish the social-networking connection comprises:

a name or nickname of a user associated with the second computing device; and

an image selected by the user associated with the second computing device.

10. One or more computer-readable non-transitory storage media embodying software that is operable when executed by a first computing device to:

receive a connection request from a second computing device, the connection request comprising an invitation to establish a social-networking connection;

display a message indicating the received invitation to establish the social-networking connection;

after receiving user confirmation via a manual input that the connection request is authentic, establish a direct wireless connection with the second computing device;

after the direct wireless connection is established, exchange social-networking information with the second computing device using the direct wireless connection;

in response to determining that the first computing device does not currently have a network connection, store at least a portion of the social-networking information exchanged between the first and second computing devices in one or more memory devices of the first computing device; and

in response to detecting an available network connection:

connect to the available network connection; and

send, via the available network connection, the stored portion of the social-networking information to a computing device of a social-networking system.

11. The media of claim 10 , wherein the direct wireless connection comprises:

WI-FI DIRECT;

BLUETOOTH;

BLUETOOTH LOW ENERGY (BLE); or

near-field communication (NFC).

12. The media of claim 10 , wherein the social-networking information exchanged between the first and second computing devices comprises:

a friend request;

contact information;

one or more files;

one or more applications; or

social-networking information.

13. The media of claim 10 , wherein the exchange of social-networking information with the second computing device comprises the first computing device sending information to or receiving information from the second computing device in an encrypted form.

14. The media of claim 10 , wherein establishing the direct wireless connection with the second computing device comprises:

broadcasting, by the second computing device, a connection request comprising a nickname, alias, first name, image, or user identifier;

receiving, by the first computing device, the connection request from the second computing device; and

accepting, by a first user, the connection request.

15. The media of claim 10 , wherein establishing the direct wireless connection with the second computing device comprises using a one-way authentication protocol comprising:

the first computing device sending encrypted information to the second computing device; and

the second computing device decrypting the encrypted information.

16. The media of claim 10 , wherein establishing the direct wireless connection with the second computing device comprises using a two-way authentication protocol comprising:

the first computing device sending first encrypted information to the second computing device;

the second computing device sending second encrypted information to the first computing device;

the second computing device decrypting the first encrypted information; and

the first computing device decrypting the second encrypted information.

17. A first computing device, comprising:

one or more processors; and

a memory coupled to the one or more processors comprising instructions executable by the one or more processors, the one or more processors being operable when executing the instructions to:

receive a connection request from a second computing device, the connection request comprising an invitation to establish a social-networking connection;

display a message indicating the received invitation to establish the social-networking connection;

after receiving user confirmation via a manual input that the connection request is authentic, establish a direct wireless connection with the second computing device;

after the direct wireless connection is established, exchange social-networking information with the second computing device using the direct wireless connection;

in response to determining that the first computing device does not currently have a network connection, store at least a portion of the social-networking information exchanged between the first and second computing devices in one or more memory devices of the first computing device; and

in response to detecting an available network connection:

connect to the available network connection; and

send, via the available network connection, the stored portion of the social-networking information to a computing device of a social-networking system.

18. The first computing device of claim 17 , wherein:

the direct wireless connection comprises:

WI-FI DIRECT;

BLUETOOTH;

BLUETOOTH LOW ENERGY (BLE); or

near-field communication (NFC); and

the social-networking information exchanged between the first and second computing devices comprises:

a friend request;

contact information;

one or more files;

one or more applications; or

social-networking information.

19. The first computing device of claim 17 , wherein the exchange of social-networking information with the second computing device comprises the first computing device sending information to or receiving information from the second computing device in an encrypted form.

20. The first computing device of claim 17 , wherein establishing the direct wireless connection with the second computing device comprises:

broadcasting, by the second computing device, a connection request comprising a nickname, alias, first name, image, or user identifier;

receiving, by the first computing device, the connection request from the second computing device; and

accepting, by a first user, the connection request.