____ was designed to provide built in cryptography for the clipper chip.

Skipjack was specifically developed to provide built-in cryptography for the Clipper chip, a telecommunications encryption device designed by the U.S. National Security Agency (NSA) during the early 1990s. The Clipper chip used Skipjack encryption to secure telephone conversations and was intended to balance the needs for privacy and law enforcement access. The selection of Skipjack was significant due to its unique design, which utilized an 80-bit key and a specific algorithm that allowed for efficient and secure data encryption.

In the context of this question, understanding the purpose of Skipjack and its association with the Clipper chip is essential. Other encryption methods mentioned, like 3DES, GOST, and Blowfish, have their own characteristics and applications but were not designed specifically for use with the Clipper chip. Thus, Skipjack remains the correct answer for this question as it was explicitly created for that purpose.