Re: 1024 bit key used to sign GLPK distribution package

> you are using a 1024 bit key for signing GLPK distribution tar balls.
> 
> 1024 bit is no longer considered safe. Cf.
> http://csrc.nist.gov/publications/nistpubs/800-57/sp800-57-Part1-revised2_Mar08-2007.pdf
> 
> Furthermore you are using SHA-1 for signing.
> SHA1 is also regarded as unsafe.
> 

AFAIK, many other GNU packages use a similar signature. See for example,
ftp://ftp.gnu.org/gnu/gcc/gcc-6.3.0/ .