diff --git a/xep.ent b/xep.ent
index 2fb8c8a8..9f7805e6 100644
--- a/xep.ent
+++ b/xep.ent
@@ -70,6 +70,56 @@
 <!ENTITY TRANSPORT "&lt;transport/&gt;">
 <!ENTITY CANDIDATE "&lt;candidate/&gt;">
 
+<!-- shortcuts for Encrypted Sessions XEPs -->
+
+<!ENTITY CBeCAx2n1 "&CsubB; = &CsubA; XOR 2<span class='super'>n-1</span>">
+<!ENTITY CsubA "C<span class='sub'>A</span>">
+<!ENTITY CsubB "C<span class='sub'>B</span>">
+<!ENTITY dsupx "d<span class='super'>x</span>">
+<!ENTITY e1eZ "e<span class='sub'>1</span>...e<span class='sub'>Z</span>">
+<!ENTITY esupy "e<span class='super'>y</span>">
+<!ENTITY formA "form<span class='sub'>A</span>">
+<!ENTITY formA2 "form<span class='sub'>A2</span>">
+<!ENTITY formB "form<span class='sub'>B</span>">
+<!ENTITY formB2 "form<span class='sub'>B2</span>">
+<!ENTITY gsupx "g<span class='super'>x</span>">
+<!ENTITY gsupy "g<span class='super'>y</span>">
+<!ENTITY He1HeZ "He<span class='sub'>1</span>...He<span class='sub'>Z</span>">
+<!ENTITY IDA "ID<span class='sub'>A</span>">
+<!ENTITY IDB "ID<span class='sub'>B</span>">
+<!ENTITY isPKsubA "isPK<span class='sub'>A</span>">
+<!ENTITY isPKsubB "isPK<span class='sub'>B</span>">
+<!ENTITY KCsubA "KC<span class='sub'>A</span>">
+<!ENTITY KCsubB "KC<span class='sub'>B</span>">
+<!ENTITY KMsubA "KM<span class='sub'>A</span>">
+<!ENTITY KMsubB "KM<span class='sub'>B</span>">
+<!ENTITY KSsubA "KS<span class='sub'>A</span>">
+<!ENTITY KSsubB "KS<span class='sub'>B</span>">
+<!ENTITY macA "mac<span class='sub'>A</span>">
+<!ENTITY macB "mac<span class='sub'>B</span>">
+<!ENTITY NsubA "N<span class='sub'>A</span>">
+<!ENTITY NsubB "N<span class='sub'>B</span>">
+<!ENTITY MsubA "M<span class='sub'>A</span>">
+<!ENTITY MsubB "M<span class='sub'>B</span>">
+<!ENTITY pubKeyA "pubKey<span class='sub'>A</span>">
+<!ENTITY pubKeyB "pubKey<span class='sub'>B</span>">
+<!ENTITY pubKeysA "pubKeys<span class='sub'>A</span>">
+<!ENTITY RS1ARSZA "RS<span class='sub'>1A</span>...RS<span class='sub'>ZA</span>">
+<!ENTITY RS1BRSZB "RS<span class='sub'>1B</span>...RS<span class='sub'>ZB</span>">
+<!ENTITY RSH1ARSHZA "RSH<span class='sub'>1A</span>...RSH<span class='sub'>ZA</span>">
+<!ENTITY setA "{&KCsubB;&#160;&KMsubB;&#160;x}">
+<!ENTITY setB "{&KCsubA;&#160;&KMsubA;&#160;y}">
+<!ENTITY signA "sign<span class='sub'>A</span>">
+<!ENTITY signB "sign<span class='sub'>B</span>">
+<!ENTITY signKeyA "signKey<span class='sub'>A</span>">
+<!ENTITY signKeyB "signKey<span class='sub'>B</span>">
+<!ENTITY signKeysA "signKeys<span class='sub'>A</span>">
+<!ENTITY signsA "signs<span class='sub'>A</span>">
+<!ENTITY signsB "signs<span class='sub'>B</span>">
+<!ENTITY twosup2n "2<span class='super'>2n-1</span>">
+<!ENTITY twosup32 "2<span class='super'>32</span>">
+<!ENTITY x1xZ "x<span class='sub'>1</span>...x<span class='sub'>Z</span>">
+
 <!-- shortcuts for address types -->
 
 <!ENTITY BAREJID "&lt;node@domain.tld&gt;">