An algorithm which is a part of the U.S. government's long-term project to develop a set of standards for publicly available cryptography as authorized by the Computer Security Act of 1987 accepts a message of 264 bits in length and a 160-bit message output digest is produced to complicate text searching. Which of the following algorithms is a family of two similar hash functions, with different block sizes, and uses 32-bit words and 64-bit words?