diff --git a/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.md b/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.md
index 13a514c175..55158130f8 100644
--- a/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.md
+++ b/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.md
@@ -164,7 +164,7 @@ The main objective here is to establish the framework for comparing the security
2 Post-quantum cryptography is available in beta version, as opt-in only for direct conversations. See below how it will be rolled-out further.
Some columns are marked with a yellow checkmark:
-- when messages are padded, but not to a fixed size.
+- when messages are padded, but not to a fixed size (Briar pads messages to the size rounded up to 1024 bytes, Signal - to 160 bytes).
- when repudiation does not include client-server connection. In case of Cwtch it appears that the presence of cryptographic signatures compromises repudiation (deniability), but it needs to be clarified.
- when 2-factor key exchange is optional (via security code verification).
- when post-quantum cryptography is only added to the initial key agreement and does not protect break-in recovery.
diff --git a/blog/images/20240314-comparison.jpg b/blog/images/20240314-comparison.jpg
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diff --git a/media-logos/README.md b/media-logos/README.md
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+++ b/media-logos/README.md
@@ -0,0 +1,5 @@
+# SimpleX logos
+
+Please use these logos in your publications about SimpleX Chat.
+
+You can also use app screenshots and diagrams from our [blog posts](../blog/README.md) – please reference them.
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diff --git a/media-logos/simplex-symbol-dark.png b/media-logos/simplex-symbol-dark.png
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diff --git a/media-logos/simplex-symbol-dark.svg b/media-logos/simplex-symbol-dark.svg
new file mode 100644
index 0000000000..fa598acf3d
--- /dev/null
+++ b/media-logos/simplex-symbol-dark.svg
@@ -0,0 +1,10 @@
+
diff --git a/media-logos/simplex-symbol-light.png b/media-logos/simplex-symbol-light.png
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diff --git a/media-logos/simplex-symbol-light.svg b/media-logos/simplex-symbol-light.svg
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+++ b/media-logos/simplex-symbol-light.svg
@@ -0,0 +1,15 @@
+