---
name: "sfs_srp_params"
section: "5"
platform: "linux"
package: "sfs-server"
version: "1:0.8-0+pre20060720.1-1"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/sfs_srp_params"
---

# sfs\_srp\_params(5)

default parameters for SRP protocol

## NAME

sfs\_srp\_params - default parameters for SRP protocol

## DESCRIPTION

Specifies a \`\`strong prime'' and a generator for use in the SRP protocol.  SFS ships with a particular set of parameters because generating new ones can take a considerable amount of CPU time.  You can replace these parameters with randomly generated ones using the **sfskey srpgen -b** *bits* command.

Note that SRP parameters can afford to be slightly shorter than Rabin public keys, both because SRP is based on discrete logs rather than factoring, and because SRP is used for authentication, not secrecy.

The format of the file is a single line of the form:

N=0xModulus,g=0xGenerator

*Modulus* is a prime number, represented in hexadecimal, which must satisfy the property that (*Modulus*-1)/2 is also prime. *Generator* is an element of the multiplicative group of integers modulo *Modulus* such that *Generator* has order (*Modulus*-1)/2.

## FILES

- */etc/sfs/sfs\_srp\_params*

  - */usr/local/share/sfs/sfs\_srp\_params*

  default parameters for SRP protocol

(Files in */etc/sfs* supersede default versions in */usr/local/share/sfs*.)

## SEE ALSO

[*dirsearch*(1)](/dirsearch/1.md), [*newaid*(1)](/newaid/1.md), [*rex*(1)](/rex/1.md), [*sfsagent*(1)](/sfsagent/1.md), [*sfskey*(1)](/sfskey/1.md), [*ssu*(1)](/ssu/1.md), *sfs\_config*(5), [*sfs\_hosts*(5)](/sfs_hosts/5.md), [*sfs\_users*(5)](/sfs_users/5.md), [*sfsauthd\_config*(5)](/sfsauthd_config/5.md), [*sfscd\_config*(5)](/sfscd_config/5.md), *sfsrosd\_config*(5), [*sfsrwsd\_config*(5)](/sfsrwsd_config/5.md), [*sfssd\_config*(5)](/sfssd_config/5.md), [*sfs\_environ*(7)](/sfs_environ/7.md), [*funmount*(8)](/funmount/8.md), *nfsmounter*(8), [*sfsauthd*(8)](/sfsauthd/8.md), [*sfscd*(8)](/sfscd/8.md), *sfsrosd*(8), *sfsrwcd*(8), [*sfsrwsd*(8)](/sfsrwsd/8.md), [*sfssd*(8)](/sfssd/8.md), [*vidb*(8)](/vidb/8.md)

The full documentation for **SFS** is maintained as a Texinfo manual.  If the **info** and **SFS** programs are properly installed at your site, the command **info SFS** should give you access to the complete manual.

For updates, documentation, and software distribution, please see the **SFS** website at *http://www.fs.net/*.

## AUTHOR

sfsdev@redlab.lcs.mit.edu