There are four major components of Capstone: a bulk data encryption
algorithm, a digital signature algorithm, a key exchange protocol, and a
hash function. The data encryption algorithm is called Skipjack (see
Question 3.6.5), but is often referred to as Clipper, which is
the encryption chip that includes Skipjack (see Question 3.6.2).
The digital signature algorithm is DSS (see Question 3.6.8) and
the hash function is SHS (see Question 3.8.4 about SHS and
Question 3.8.2 about hash functions). The key exchange protocol
has not yet been announced.
All the parts of Capstone have 80-bit security: all the keys involved are 80 bits long and other aspects are also designed to withstand anything less than an ``80-bit'' attack, that is, an effort of 280 operations. Eventually the government plans to place the entire Capstone cryptographic system on a single chip.