Khufu and Khafre

Khufu and Khafre do this, for example.

Radjedef definitely ruled between Khufu and Khafre, that is proven by contemporary inscriptions.

It was named after the Egyptian Pharaoh Sneferu, continuing the tradition of the Khufu and Khafre block ciphers.

While at Xerox PARC, Merkle designed the Khufu and Khafre block ciphers, and the Snefru hash function.

In cryptography, Khufu and Khafre are two block ciphers designed by Ralph Merkle in 1989 while working at Xerox's Palo Alto Research Center.

The cipher FEAL (followed by Khufu and Khafre) introduced the practice of key whitening using portions of the same key used in the rest of the cipher.

NSA/CSS has, at times, attempted to restrict the publication of academic research into cryptography; for example, the Khufu and Khafre block ciphers were voluntarily withheld in response to an NSA request to do so.