Which cryptography element ensures no modification of data while still identifying the origin?

Authentication Headers (AH) are designed to provide integrity and authentication for data packets transmitted over a network. This means that AH ensures that the data has not been altered in transit, maintaining its integrity, while also confirming the identity of the sender. By including a cryptographic hash of the data and some of the packet header information, AH allows the recipient to verify that the data remains unchanged and is coming from the expected source.

In contrast, Encapsulated Security Payload (ESP) provides confidentiality, integrity, and authentication but is primarily focused on encrypting the data. Full Disk Encryption secures data at rest and does not provide mechanisms for verifying authenticity or integrity during transmission. Differential Linear Cryptanalysis is a method for breaking cryptographic systems and does not pertain to ensuring data integrity or authentication in network communications.