History of pgp_strong

The changes to the source code of this entry in the repository, newest first, each with the differences it made to the entry's files. They are also listed on GitLab.

2026-10-25 [entries] Fix parse bugs and improve the metadata of existing entries by Tiago de Paula Peixoto c996a0e

From a review of the dataset descriptions against the upstream sources
and papers, and from user reports:

- parse fixes (wrong edge direction or directedness, shifted or
  misnamed properties, merged node identities, duplicated or missing
  edges and nodes, wrong types), e.g. arxiv_citation (the HepTh dates
  were a copy of the HepPh ones; now from the KDD Cup 2003 data),
  eu_procurements, foursquare_global, hiv_transmission, genetic_multiplex,
  gnutella (adds the 05 snapshot), roadnet, macaque_neural, python_dependency
- descriptions rewritten from the upstream sources, documenting every
  property
- corrected titles, citations and DOIs, licences (ustream_license typo,
  the data's own terms), tags and ICON ids
- url lists for entries with several sources or dataset pages
- SocioPatterns entries moved to the site's new data location, with the
  daily networks of sp_infectious and sp_primary_school
- the Michael Fire entries marked as orphans (served from the mirror)
- redundant type forcings removed after the graph-tool coercion fixes

diff --git a/entries/pgp_strong/__init__.py b/entries/pgp_strong/__init__.py
index 683ffef..fa71155 100644
--- a/entries/pgp_strong/__init__.py
+++ b/entries/pgp_strong/__init__.py
@@ -19,13 +19,25 @@
 from .. import *
 
 title = "PGP web of trust (2009)"
-description = """Strongly connected component of the Pretty-Good-Privacy (PGP) web of trust among users, circa November 2009.[^icon]
-[^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
+description = """Strongly connected component of the Pretty Good Privacy (PGP) web of trust, circa November 2009, assembled by O. Richters and T. P. Peixoto from a dump of the public OpenPGP key servers (key-server.de). Nodes are public keys (which usually correspond to users), and a directed edge $(i,j)$ indicates that the owner of key $i$ signed key $j$, i.e. certified that key $j$ belongs to the person named in it, which is an expression of trust. Only the largest strongly connected component is included.
+
+The network has the following properties:
+
+- `id`: the key ID (64-bit, in hexadecimal).
+- `uid`: the primary user ID of the key (usually a name and an email address).
+- `subkeys`: the IDs of the subkeys of the key.
+- `date`: the creation time of the key (Unix time).
+- `expire_date`, `rev_date`: the expiration and revocation times of the key (Unix time), or $2^{63}-1$ if the key does not expire or was not revoked.
+- `valid`: whether the key is valid.
+- `s`: an undocumented integer label of the node.
+- `vb`, `eb`: the betweenness centrality of the node and of the edge.
+- `e_id`: the IDs of the keys that issued the signatures of the edge (the signing key or one of its subkeys), separated by commas; an edge can correspond to several signatures.
+- `e_time`: the creation times of the signatures of the edge (Unix time)."""
 tags = ['Social', 'Online', 'Unweighted']
 url = 'https://git.skewed.de/count0/graph-tool/-/raw/master/src/graph_tool/collection/pgp-strong-2009.gt.gz'
 citation = [('O. Richters and T. P. Peixoto, "Trust Transitivity in Social Networks." PLoS ONE 6(4): e18384 (2011).', 'https://doi.org/10.1371/journal.pone.0018384')]
 icon_hash = '56a85c8e26855e083a2f78d1'
-ustream_license = None
+upstream_license = None
 upstream_prefix = 'https://git.skewed.de/count0/graph-tool/-/raw/master/src/graph_tool/collection'
 files = [('pgp-strong-2009.gt.gz', None, 'gt')]

2026-10-24 Update copyright information by Tiago de Paula Peixoto 73a4f0d

diff --git a/entries/pgp_strong/__init__.py b/entries/pgp_strong/__init__.py
index 9627e9b..683ffef 100644
--- a/entries/pgp_strong/__init__.py
+++ b/entries/pgp_strong/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020-2024 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2026 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2024-05-27 Update copyright information by Tiago de Paula Peixoto 3d288ea

diff --git a/entries/pgp_strong/__init__.py b/entries/pgp_strong/__init__.py
index 0c274d8..9627e9b 100644
--- a/entries/pgp_strong/__init__.py
+++ b/entries/pgp_strong/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020-2023 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2024 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2023-02-19 Update copyright information by Tiago de Paula Peixoto 8d005ae

diff --git a/entries/pgp_strong/__init__.py b/entries/pgp_strong/__init__.py
index 688c6c8..0c274d8 100644
--- a/entries/pgp_strong/__init__.py
+++ b/entries/pgp_strong/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2021 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2023 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2021-06-22 Update copyright info by Tiago de Paula Peixoto db2efcc

diff --git a/entries/pgp_strong/__init__.py b/entries/pgp_strong/__init__.py
index 058a79f..688c6c8 100644
--- a/entries/pgp_strong/__init__.py
+++ b/entries/pgp_strong/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2021 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2020-11-28 Update citations to use DOIs by Tiago de Paula Peixoto e878874

diff --git a/entries/pgp_strong/__init__.py b/entries/pgp_strong/__init__.py
index 1037f47..058a79f 100644
--- a/entries/pgp_strong/__init__.py
+++ b/entries/pgp_strong/__init__.py
@@ -23,7 +23,7 @@ description = """Strongly connected component of the Pretty-Good-Privacy (PGP) w
 [^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
 tags = ['Social', 'Online', 'Unweighted']
 url = 'https://git.skewed.de/count0/graph-tool/-/raw/master/src/graph_tool/collection/pgp-strong-2009.gt.gz'
-citation = [('O. Richters and T. P. Peixoto, "Trust Transitivity in Social Networks." PLoS ONE 6(4): e18384 (2011).', 'http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0018384')]
+citation = [('O. Richters and T. P. Peixoto, "Trust Transitivity in Social Networks." PLoS ONE 6(4): e18384 (2011).', 'https://doi.org/10.1371/journal.pone.0018384')]
 icon_hash = '56a85c8e26855e083a2f78d1'
 ustream_license = None
 upstream_prefix = 'https://git.skewed.de/count0/graph-tool/-/raw/master/src/graph_tool/collection'

2020-09-15 Change license from GPLv3 to AGPLv3 by Tiago de Paula Peixoto d754be5

diff --git a/entries/pgp_strong/__init__.py b/entries/pgp_strong/__init__.py
index 4802973..1037f47 100644
--- a/entries/pgp_strong/__init__.py
+++ b/entries/pgp_strong/__init__.py
@@ -3,18 +3,18 @@
 #
 # Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
 #
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
 #
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# You should have received a copy of the GNU Affero General Public License along
+# with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from .. import *

2020-09-13 Add explicit attribution to descriptions obtained from ICON by Tiago de Paula Peixoto 1645314

diff --git a/entries/pgp_strong/__init__.py b/entries/pgp_strong/__init__.py
index c984d01..4802973 100644
--- a/entries/pgp_strong/__init__.py
+++ b/entries/pgp_strong/__init__.py
@@ -19,7 +19,8 @@
 from .. import *
 
 title = "PGP web of trust (2009)"
-description = "Strongly connected component of the Pretty-Good-Privacy (PGP) web of trust among users, circa November 2009."
+description = """Strongly connected component of the Pretty-Good-Privacy (PGP) web of trust among users, circa November 2009.[^icon]
+[^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
 tags = ['Social', 'Online', 'Unweighted']
 url = 'https://git.skewed.de/count0/graph-tool/-/raw/master/src/graph_tool/collection/pgp-strong-2009.gt.gz'
 citation = [('O. Richters and T. P. Peixoto, "Trust Transitivity in Social Networks." PLoS ONE 6(4): e18384 (2011).', 'http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0018384')]

2020-08-11 Initial commit by Tiago de Paula Peixoto cc85872

diff --git a/entries/pgp_strong/__init__.py b/entries/pgp_strong/__init__.py
new file mode 100644
index 0000000..c984d01
--- /dev/null
+++ b/entries/pgp_strong/__init__.py
@@ -0,0 +1,51 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from .. import *
+
+title = "PGP web of trust (2009)"
+description = "Strongly connected component of the Pretty-Good-Privacy (PGP) web of trust among users, circa November 2009."
+tags = ['Social', 'Online', 'Unweighted']
+url = 'https://git.skewed.de/count0/graph-tool/-/raw/master/src/graph_tool/collection/pgp-strong-2009.gt.gz'
+citation = [('O. Richters and T. P. Peixoto, "Trust Transitivity in Social Networks." PLoS ONE 6(4): e18384 (2011).', 'http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0018384')]
+icon_hash = '56a85c8e26855e083a2f78d1'
+ustream_license = None
+upstream_prefix = 'https://git.skewed.de/count0/graph-tool/-/raw/master/src/graph_tool/collection'
+files = [('pgp-strong-2009.gt.gz', None, 'gt')]
+
+def fetch_upstream(force=False):
+    return fetch_upstream_files(__name__.split(".")[-1], upstream_prefix, files,
+                                force)
+
+@cache_network()
+@coerce_props()
+@annotate()
+def parse(alts=None):
+    global files
+    name = __name__.split(".")[-1]
+    for fnames, alt, fmt in files:
+        if alts is not None and alt not in alts:
+            continue
+        if isinstance(fnames, str):
+            fnames = [fnames]
+        with ExitStack() as stack:
+            fs = [stack.enter_context(open_upstream_file(name, fn, "rb")) for fn in fnames]
+            g = parse_graph(fs, fmt, directed=True)
+            del g.gp["description"]
+            del g.vp["pos"]
+        yield alt, g