Multi-device authentication process and system utilizing cryptographic techniques

A system comprising:

• a portable communication device comprising:
• a processor, and
• a non-transitory computer readable medium comprising code executable by the processor, for performing a method comprising,
• transmitting device information of the portable communication device of a user to a server computer,
• receiving, from the server computer, a first cryptographic pattern that is formed from at least a credential or a token, and a nonce,
• receiving, from a base station, a base station identifier comprising a UUID that uniquely identifies the base station,
• forming a second cryptographic pattern by hashing at least the first cryptographic pattern and the base station identifier, and
• transmitting the second cryptographic pattern and the nonce to the base station in communication with an access device or transmitting at least the base station identifier to the server computer;
• and
• the access device, wherein the access device is programmed to receive the second cryptographic pattern from the base station, compare the second cryptographic pattern to a third cryptographic pattern derived from the credential or the token from a portable transaction device, and send an authorization request message that comprises at least a portion of the third cryptographic pattern or an indication of a successful match between the second cryptographic pattern and the third cryptographic pattern to the server computer if the second and third cryptographic patterns match, and
• wherein the portable communication device, the base station, and the user are within a merchant location.