Abstract: Authentication for payment transaction includes receiving, by a point-of-sale (POS) terminal, an indication that a payment account of a cardholder is associated with a mobile device and receiving a second indication of physical possession of a payment card by a merchant. The authentication includes receiving a purchase request for an authorization of exchange from the payment account of the cardholder to the merchant and assigning a transaction identifier to the request for the authorization of the exchange. The authentication includes transmitting the request for authorization of the exchange from the cardholder payment account to the merchant and the transaction identifier. The authentication includes receiving an indication that an authentication identifier is associated with the transaction identifier. The authentication includes receiving a copy of the authentication identifier, facilitated by the cardholder.

Abstract: Authentication includes receiving an indication of physical possession of a payment card by a merchant and receiving a purchase request for an authorization of an exchange from the payment account of the cardholder to the merchant. Authentication includes assigning a randomized transaction identifier to the request for the authorization of the exchange. The method also includes transmitting the request for the authorization of the exchange from the payment account of the cardholder to the merchant and receiving the assigned randomized transaction identifier and a randomized authentication identifier associated with the randomized transaction identifier from a payment association, the payment association determining whether the request for the authorization of the exchange is valid.

Abstract: Authentication for payment transaction includes receiving, by a point-of-sale (POS) terminal, an indication that a payment account of a cardholder is associated with a mobile device and receiving a second indication of physical possession of a payment card by a merchant. The authentication includes receiving a purchase request for an authorization of exchange from the payment account of the cardholder to the merchant and assigning a transaction identifier to the request for the authorization of the exchange. The authentication includes transmitting the request for authorization of the exchange from the cardholder payment account to the merchant and the transaction identifier. The authentication includes receiving an indication that an authentication identifier is associated with the transaction identifier. The authentication includes receiving a copy of the authentication identifier, facilitated by the cardholder.

Abstract: Authentication includes determining that a cardholder payment account is associated with a mobile device. Authentication includes receiving an indication of physical possession of a payment card. Authentication includes receiving a purchase request for an authorization of an exchange of funds from the cardholder account to the merchant. Authentication includes receiving a randomized transaction identifier to the request for the authorization of the exchange. Authentication includes transmitting to the mobile device, information associated with the request. Authentication includes transmitting to the mobile device, a request for confirmation of the authorization from the cardholder from the account of the cardholder to the merchant. Authentication includes receiving an indication, facilitated by the cardholder, that the exchange is authorized. Authentication includes authorizing the exchange of from the payment account of the cardholder to the merchant.

Abstract: Authentication includes receiving an indication of physical possession of a payment card by a merchant and receiving a purchase request for an authorization of an exchange from the payment account of the cardholder to the merchant. Authentication includes assigning a randomized transaction identifier to the request for the authorization of the exchange. The method also includes transmitting the request for the authorization of the exchange from the payment account of the cardholder to the merchant and receiving the assigned randomized transaction identifier and a randomized authentication identifier associated with the randomized transaction identifier from a payment association, the payment association determining whether the request for the authorization of the exchange is valid.

Abstract: Authentication includes receiving an indication of physical possession of a payment card by a merchant and receiving a purchase request for an authorization of an exchange from the payment account of the cardholder to the merchant. Authentication includes assigning a randomized transaction identifier to the request for the authorization of the exchange. The method also includes transmitting the request for the authorization of the exchange from the payment account of the cardholder to the merchant and receiving the assigned randomized transaction identifier and a randomized authentication identifier associated with the randomized transaction identifier from a payment association, the payment association determining whether the request for the authorization of the exchange is valid.

Abstract: Authentication for payment transaction includes receiving, by a point-of-sale (POS) terminal, an indication that a payment account of a cardholder is associated with a mobile device and receiving a second indication of physical possession of a payment card by a merchant. The authentication includes receiving a purchase request for an authorization of exchange from the payment account of the cardholder to the merchant and assigning a transaction identifier to the request for the authorization of the exchange. The authentication includes transmitting the request for authorization of the exchange from the cardholder payment account to the merchant and the transaction identifier. The authentication includes receiving an indication that an authentication identifier is associated with the transaction identifier. The authentication includes receiving a copy of the authentication identifier, facilitated by the cardholder.

Abstract: Authentication includes determining that a cardholder payment account is associated with a mobile device. Authentication includes receiving an indication of physical possession of a payment card. Authentication includes receiving a purchase request for an authorization of an exchange of funds from the cardholder account to the merchant. Authentication includes receiving a randomized transaction identifier to the request for the authorization of the exchange. Authentication includes transmitting to the mobile device, information associated with the request. Authentication includes transmitting to the mobile device, a request for confirmation of the authorization from the cardholder from the account of the cardholder to the merchant. Authentication includes receiving an indication, facilitated by the cardholder, that the exchange is authorized. Authentication includes authorizing the exchange of from the payment account of the cardholder to the merchant.

Abstract: Authentication includes receiving an indication of physical possession of a payment card by a merchant and receiving a purchase request for an authorization of an exchange from the payment account of the cardholder to the merchant. Authentication includes assigning a randomized transaction identifier to the request for the authorization of the exchange. The method also includes transmitting the request for the authorization of the exchange from the payment account of the cardholder to the merchant and receiving the assigned randomized transaction identifier and a randomized authentication identifier associated with the randomized transaction identifier from a payment association, the payment association determining whether the request for the authorization of the exchange is valid.

Abstract: System, method and computer program product for setting phase control codes to (in-phase) I and (quadrature) Q rotators to a first code pair, different by enough to produce a phase difference between the rotator outputs sufficient to be detected with minimal error by a phase-to-voltage converter. Auxiliary trim DACs are then adjusted according to calibration logic until a comparator output detects a phase difference between the I and Q rotators are within tolerable limits. The resulting trim codes are stored for both the codes in the pair. These trim codes along with the main codes are subsequently applied whenever the codes are used thereafter. These steps are repeated with each successive code pair having the same separation as the first code pair, e.g. both incremented by same amount until all codes have been calibrated. In this manner having the phase separation between all code pairs forced to the same value.

Abstract: Authentication for payment transaction includes receiving, by a point-of-sale (POS) terminal, an indication that a payment account of a cardholder is associated with a mobile device and receiving a second indication of physical possession of a payment card by a merchant. The authentication includes receiving a purchase request for an authorization of exchange from the payment account of the cardholder to the merchant and assigning a transaction identifier to the request for the authorization of the exchange. The authentication includes transmitting the request for authorization of the exchange from the cardholder payment account to the merchant and the transaction identifier. The authentication includes receiving an indication that an authentication identifier is associated with the transaction identifier. The authentication includes receiving a copy of the authentication identifier, facilitated by the cardholder.

Abstract: Authentication for payment transaction includes receiving, by a point-of-sale (POS) terminal, an indication that a payment account of a cardholder is associated with a mobile device and receiving a second indication of physical possession of a payment card by a merchant. The authentication includes receiving a purchase request for an authorization of exchange from the payment account of the cardholder to the merchant and assigning a transaction identifier to the request for the authorization of the exchange. The authentication includes transmitting the request for authorization of the exchange from the cardholder payment account to the merchant and the transaction identifier. The authentication includes receiving an indication that an authentication identifier is associated with the transaction identifier. The authentication includes receiving a copy of the authentication identifier, facilitated by the cardholder.

Abstract: Authentication includes determining that a cardholder payment account is associated with a mobile device. Authentication includes receiving an indication of physical possession of a payment card. Authentication includes receiving a purchase request for an authorization of an exchange of funds from the cardholder account to the merchant. Authentication includes receiving a randomized transaction identifier to the request for the authorization of the exchange. Authentication includes transmitting to the mobile device, information associated with the request. Authentication includes transmitting to the mobile device, a request for confirmation of the authorization from the cardholder from the account of the cardholder to the merchant. Authentication includes receiving an indication, facilitated by the cardholder, that the exchange is authorized. Authentication includes authorizing the exchange of from the payment account of the cardholder to the merchant.

Abstract: Authentication includes receiving an indication of physical possession of a payment card by a merchant and receiving a purchase request for an authorization of an exchange from the payment account of the cardholder to the merchant. Authentication includes assigning a randomized transaction identifier to the request for the authorization of the exchange. The method also includes transmitting the request for the authorization of the exchange from the payment account of the cardholder to the merchant and receiving the assigned randomized transaction identifier and a randomized authentication identifier associated with the randomized transaction identifier from a payment association, the payment association determining whether the request for the authorization of the exchange is valid.

Abstract: Authentication includes receiving an indication of physical possession of a payment card by a merchant and receiving a purchase request for an authorization of an exchange from the payment account of the cardholder to the merchant. Authentication includes assigning a randomized transaction identifier to the request for the authorization of the exchange. The method also includes transmitting the request for the authorization of the exchange from the payment account of the cardholder to the merchant and receiving the assigned randomized transaction identifier and a randomized authentication identifier associated with the randomized transaction identifier from a payment association, the payment association determining whether the request for the authorization of the exchange is valid.

Abstract: Authentication includes determining that a cardholder payment account is associated with a mobile device. Authentication includes receiving an indication of physical possession of a payment card. Authentication includes receiving a purchase request for an authorization of an exchange of funds from the cardholder account to the merchant. Authentication includes receiving a randomized transaction identifier to the request for the authorization of the exchange. Authentication includes transmitting to the mobile device, information associated with the request. Authentication includes transmitting to the mobile device, a request for confirmation of the authorization from the cardholder from the account of the cardholder to the merchant. Authentication includes receiving an indication, facilitated by the cardholder, that the exchange is authorized. Authentication includes authorizing the exchange of from the payment account of the cardholder to the merchant.

Abstract: System, method and computer program product for setting phase control codes to (in-phase) I and (quadrature) Q rotators to a first code pair, different by enough to produce a phase difference between the rotator outputs sufficient to be detected with minimal error by a phase-to-voltage converter. Auxiliary trim DACs are then adjusted according to calibration logic until a comparator output detects a phase difference between the I and Q rotators are within tolerable limits. The resulting trim codes are stored for both the codes in the pair. These trim codes along with the main codes are subsequently applied whenever the codes are used thereafter. These steps are repeated with each successive code pair having the same separation as the first code pair, e.g. both incremented by same amount until all codes have been calibrated. In this manner having the phase separation between all code pairs forced to the same value.

Abstract: System, method and computer program product for setting phase control codes to (in-phase) I and (quadrature) Q rotators to a first code pair, different by enough to produce a phase difference between the rotator outputs sufficient to be detected with minimal error by a phase-to-voltage converter. Auxiliary trim DACs are then adjusted according to calibration logic until a comparator output detects a phase difference between the I and Q rotators are within tolerable limits. The resulting trim codes are stored for both the codes in the pair. These trim codes along with the main codes are subsequently applied whenever the codes are used thereafter. These steps are repeated with each successive code pair having the same separation as the first code pair, e.g. both incremented by same amount until all codes have been calibrated. In this manner having the phase separation between all code pairs forced to the same value.

Abstract: System, method and computer program product for setting phase control codes to (in-phase) I and (quadrature) Q rotators to a first code pair, different by enough to produce a phase difference between the rotator outputs sufficient to be detected with minimal error by a phase-to-voltage converter. Auxiliary trim DACs are then adjusted according to calibration logic until a comparator output detects a phase difference between the I and Q rotators are within tolerable limits. The resulting trim codes are stored for both the codes in the pair. These trim codes along with the main codes are subsequently applied whenever the codes are used thereafter. These steps are repeated with each successive code pair having the same separation as the first code pair, e.g. both incremented by same amount until all codes have been calibrated. In this manner having the phase separation between all code pairs forced to the same value.

Abstract: A phase locked loop generates an output corresponding to a source synchronous input and an input link clock signal. A phase locking feedback system receives the input and an input link clock signal and detects phase deviations between the output and the input. The phase locking feedback system also adjusts an adjusted clock signal based on the phase deviations thereby causing the phase locking feedback system to generate the output so that the output has a steady phase relationship with the input. A first mechanism causes the phase locking feedback system not to track phase deviations between the output and the input upon occurrence of a first predefined event, thereby maintaining the adjusted clock signal at a current state.