atmark@atde4:~$ sudo apt-key list /etc/apt/trusted.gpg -------------------- pub 1024D/F42584E6 2008-04-06 [–ž—¹: 2012-05-15] uid Lenny Stable Release Key pub 4096R/55BE302B 2009-01-27 [–ž—¹: 2012-12-31] uid Debian Archive Automatic Signing Key (5.0/lenny) pub 2048R/6D849617 2009-01-24 [–ž—¹: 2013-01-23] uid Debian-Volatile Archive Automatic Signing Key (5.0/lenny) pub 4096R/B98321F9 2010-08-07 [–ž—¹: 2017-08-05] uid Squeeze Stable Release Key pub 4096R/473041FA 2010-08-27 [–ž—¹: 2018-03-05] uid Debian Archive Automatic Signing Key (6.0/squeeze) pub 4096R/46925553 2012-04-27 [–ž—¹: 2020-04-25] uid Debian Archive Automatic Signing Key (7.0/wheezy) pub 4096R/65FFB764 2012-05-08 [–ž—¹: 2019-05-07] uid Wheezy Stable Release Key