.SH VERSIONS
These functions are present in
glibc 2.1 and later.
+.SH VERSIONS
+Because they employ the DES block cipher,
+which is no longer considered secure,
+.BR ecb_crypt (),
+.BR ecb_crypt (),
+.BR crypt_r (),
+and
+.BR des_setparity ()
+were removed in glibc 2.28.
+Applications should switch to a modern cryptography library, such as
+.BR libgcrypt .
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).