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OSPFv2 issues Also Keyed MD5 is the default authentication algorithm used While there are no openly published attacks on that mechanism, some reports [Dobb96a, Dobb96b] create concern about the ultimate strength of the MD5 cryptographic hash function. Further, some end users, particularly several different governments, require the use of the SHA-1 hash function rather than any other such function for policy reasons. Draft to recommend HMAC construct already there for RIP/ IS-IS |