Signature aggregation is a process used in cryptography to combine multiple digital signatures into a single signature. This technique enhances efficiency by reducing the amount of data that needs to be transmitted or stored. It is particularly useful in scenarios where many signatures are generated, such as in blockchain transactions or secure communications. By aggregating signatures, systems can maintain security while improving performance. For example, in a network of devices, blockchain technology can utilize signature aggregation to streamline the verification process, ensuring that all parties can trust the authenticity of the data without needing to check each individual signature separately.