Kerberos version 4, the first public version, was released on January 24, 1989. Since Kerberos 4 was developed in the United States, and since it used the Data Encryption Standard (DES) encryption algorithm, U.S. export control restrictions prevented it from being exported to other countries. MIT created an exportable version of Kerberos 4 with all encryption code removed, called "Bones". Eric Young of Australia's Bond University reimplemented DES into Bones, in a version called "eBones", which could be freely used in any country. Sweden's Royal Institute of Technology released another reimplementation called KTH-KRB.
Kerberos version 4, the first public version, was released on January 24, 1989. Since Kerberos 4 was developed in the United States and since it used the Data Encryption Standard (DES) encryption algorithm, U.S export control restrictions prevented it from being exported to other countries. MIT created an exportable version of Kerberos 4 with all encryption code removed, called "Bones". Eric Young of Australia's Bond University reimplemented DES into Bones, in a version called "eBones", which could be freely used in any country. Sweden's Royal Institute of Technology released another reimplementation called KTH-KRB