From 4479d21d26a91249fd415fa59f3de8624d579d5f Mon Sep 17 00:00:00 2001
From: Martin Schanzenbach <schanzen@gnunet.org>
Date: Thu, 26 May 2022 18:06:08 +0200
Subject: modify difficulty calculation

---
 draft-schanzen-gns.xml | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/draft-schanzen-gns.xml b/draft-schanzen-gns.xml
index 960d6f5..f113141 100644
--- a/draft-schanzen-gns.xml
+++ b/draft-schanzen-gns.xml
@@ -686,8 +686,8 @@ zTLD[126..129].zTLD[63..125].zTLD[0..62]
        </dl>
        <t>
          Usually, PoW schemes require to find one POW value such that
-         at least D leading zeroes are found in the hash result.
-         D is then referred to as the difficulty of the PoW.
+         a specific number of leading zeroes are found in the hash result.
+         This number is then referred to as the difficulty of the PoW.
          In order to reduce the variance in time it takes to calculate the
          PoW, a valid GNS revocation requires that a number Z different PoWs
          must be found that on average have D leading zeroes.
@@ -709,7 +709,7 @@ zTLD[126..129].zTLD[63..125].zTLD[0..62]
          <dt>Z</dt>
          <dd>The number of PoWs that are required. Its value is fixed at 32.</dd>
          <dt>D</dt>
-         <dd>The minimum average difficulty. Its value is fixed at 22.</dd>
+         <dd>The lower limit of the average difficulty. Its value is fixed at 22.</dd>
          <dt>EPOCH</dt>
          <dd>A single epoch. Its value is fixed at 365 days in microseconds.</dd>
        </dl>
@@ -757,7 +757,7 @@ zTLD[126..129].zTLD[63..125].zTLD[0..62]
            microseconds in network byte order.
            The field <bcp14>SHOULD</bcp14> be set to EPOCH * 1.1.
            Given an average number of leading zeros D', then the field value
-           <bcp14>MAY</bcp14> be increased up to (D'-D) * EPOCH * 1.1.
+           <bcp14>MAY</bcp14> be increased up to (D'-D+1) * EPOCH * 1.1.
            Validators <bcp14>MAY</bcp14> reject messages with lower or higher
            values when received.
            The EPOCH is extended by
@@ -847,7 +847,7 @@ zTLD[126..129].zTLD[63..125].zTLD[0..62]
          <li>The signature <bcp14>MUST</bcp14> be verified against the zone key.</li>
          <li>The set of POW values <bcp14>MUST</bcp14> NOT contain duplicates which <bcp14>MUST</bcp14> be checked by verifying that the values are strictly monotonically increasing.</li>
          <li>The average number of leading zeroes D' resulting from the provided
-         POW values <bcp14>MUST</bcp14> be greater than and not equal to D.  Implementers
+         POW values <bcp14>MUST</bcp14> be greater than or equal to D.  Implementers
          <bcp14>MUST NOT</bcp14> use an integer data type to calculate or represent D'.</li>
        </ol>
        <t>
@@ -861,7 +861,7 @@ zTLD[126..129].zTLD[63..125].zTLD[0..62]
        </t>
        <t>
          The validity period of the revocation is calculated as
-         (D'-D) * EPOCH * 1.1. The EPOCH is extended by
+         (D'-D+1) * EPOCH * 1.1. The EPOCH is extended by
          10% in order to deal with unsynchronized clocks.
          The validity period added on top of the TIMESTAMP yields the
          expiration date.
-- 
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