Title: The Internet IP Security Domain of Interpretation for ISAKMP
Abstract: Section 4.4.4.2 states, "All implememtations within the IPSEC DOI MUST support ESP_DES...".Recent work in the area of cryptanalysis suggests that DES may not be sufficiently strong for many applications.Therefore, it is very likely that the IETF will deprecate the use of ESP_DES as a mandatory cipher suite in the near future.It will remain as an optional use protocol.Although the IPsec working group and the IETF in general have not settled on an alternative algorithm (taking into account concerns of security and performance), implementers may want to heed the recommendations of section 4.4.4.3 on the use of ESP_3DES.1.