In the context of encryption, what is a "security token"?

In the context of encryption, a security token is primarily recognized as a device that generates or stores cryptographic keys. These tokens play a critical role in enhancing the security of cryptographic systems by ensuring that sensitive key material is safely stored or generated in a controlled manner.

Security tokens can be either physical devices, such as USB tokens or smart cards, or they can be software-based solutions that manage keys securely. When used for key generation, they can create strong, random keys that are less susceptible to attacks compared to keys generated by less secure methods. When used for key storage, these devices ensure that the keys are protected from unauthorized access, making it more difficult for potential attackers to compromise cryptographic data.

This functionality is essential in secure communications, digital signatures, and maintaining the integrity and confidentiality of sensitive information, making option B the most accurate definition within the context of encryption.