In which scenario would steganography most likely be employed?

Steganography is primarily used for the purpose of concealing information within other non-suspicious data, such as embedding messages within images or audio files. This technique allows individuals to communicate covertly without drawing attention to the existence of the hidden information. In the context of the choices provided, obfuscation aligns perfectly with the goal of steganography, which is to obscure the message's presence rather than its content.

Obfuscation involves making information unclear or unintelligible, and steganography achieves this by hiding information in plain sight. Consequently, it serves as a method of obfuscating data communications, ensuring that unauthorized observers cannot easily discern the presence of sensitive content.

The other scenarios, such as integrity, non-repudiation, and blockchain, do not directly apply to the primary functions and aims of steganography. Integrity pertains to ensuring the accuracy and trustworthiness of data, non-repudiation deals with preventing users from denying their actions, and blockchain focuses on secure, decentralized record-keeping without inherently involving hidden information. Thus, steganography's role in obfuscation makes it the most appropriate context among the provided options.