Editing RIPEMD (section)

{{Short description|Cryptographic hash function}}
{{Infobox cryptographic hash function
| name           = RIPEMD
| image          =
| caption        =
<!-- General -->
| designers      = [[Hans Dobbertin]], [[Antoon Bosselaers]] and [[Bart Preneel]]
| publish date   = 1992
| series         =
| derived from   =
| derived to     =
| related to     =
| certification  = RIPEMD-160: [[CRYPTREC]] (Monitored)
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| digest size    = 128, 160, 256, 320 bits
| structure      =
| rounds         =
| cryptanalysis  =
}}

[[File:RIPEMD 160 2.png|thumbnail|right|300px|A sub-block from the compression function of the RIPEMD-160 hash algorithm]]
{{Wikifunctions|Z10138|RIPEMD-128}}
{{Wikifunctions|Z10139|RIPEMD-160}}
'''RIPEMD''' ('''RIPE Message Digest''') is a family of [[cryptographic hash function]]s developed in 1992 (the original RIPEMD) and 1996 (other variants). There are five functions in the family: RIPEMD, RIPEMD-128, RIPEMD-160, RIPEMD-256, and RIPEMD-320, of which RIPEMD-160 is the most common.{{cn|reason=Most common is true but not a verified claim here|date=April 2024}}

The original RIPEMD, as well as RIPEMD-128, is not considered secure because 128-bit result is too small and also (for the original RIPEMD) because of design weaknesses. The 256- and 320-bit versions of RIPEMD provide the same level of security as RIPEMD-128 and RIPEMD-160, respectively; they are designed for applications where the security level is sufficient but longer hash result is necessary.

While RIPEMD functions are less popular than [[SHA-1]] and [[SHA-2]], they are used, among others, in [[Bitcoin]] and other [[cryptocurrencies]] based on Bitcoin.{{Citation needed|reason=I could only find sources for RIPEMD-160 being used for Bitcoin addresses, which, if that's the case, should have a citation and also be clarified with both the exact used function (RIPEMD-160) and use case (and be put in the Bitcoin article)|date=April 2024}}