Cryptography Research discovered DPA attacks, which analyse the power consumption fluctuations of tamper-resistant devices to extract cryptographic keys.
The company has patented several countermeasures, including techniques to mask the correlation between cryptographic computations and power consumption.
The countermeasures are designed to protect against the use of DPA attacks for purposes of fraud, piracy, cloning, reverse engineering and espionage.
The countermeasures are typically used to protect secrets used in mobile, banking government and defence applications.
A licence from Cryptography Research is required by companies such as Microsoft to make, use and sell products that contain these countermeasures.
"We are pleased to announce Microsoft as our newest licensee," said Paul Kocher, president and chief scientist at Cryptography Research.
DPA countermeasures and other security capabilities are becoming increasingly important for complex devices, he said.