Hash-based message authentication code (HMAC) provides the server and the client each with a private key that is known only to that specific server and that specific client. The client creates a unique HMAC, or hash, per request to the server by hashing the request data with the private keys and sending it as part of a request. What makes HMAC more secure than Message Authentication Code (MAC) is that the key and the message are hashed in separate steps.
Brownsville, Texas. Brownsville is the county seat of Cameron County, Texas. It is the sixteenth most populous city in the state of Texas, with a population at the 2010 census of 175,023 and an estimated population in 2014 of 183,046.
Major airports near Brownsville, Texas: The nearest major airport is Brownsville/South Padre Island International Airport (BRO / KBRO). This airport has domestic flights and is 5 miles from the center of Brownsville, TX. Another major airport is General Servando Canales International Airport (MAM / MMMA), which has domestic flights from Matamoros, Mexico and is 10 miles from Brownsville, TX. Valley International Airport (HRL / KHRL) has domestic flights from Harlingen, Texas and is 29 miles from Brownsville, TX. General Lucio Blanco International Airport (REX / MMRX) has domestic flights from Reynosa, Mexico and is 53 miles from Brownsville, TX.