diff --git a/README.md b/README.md
index 51e52e2..feecf67 100644
--- a/README.md
+++ b/README.md
@@ -20,9 +20,9 @@ The following is the draft timetable:
 | 3  | 3 Feb 2025   | Symmetric Key [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit02_symmetric)]                                 | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit02_symmetric/lab)]  [Vincent Rijmen](https://www.youtube.com/watch?v=u8kakBA7mkc)         |
 | 4  | 10 Feb 2025  | Hashing and MAC [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit03_hashing)]                               | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit03_hashing/lab)   [Ivan Damgård](https://www.youtube.com/watch?v=crQVIqrJzds)    |
 | 5  | 17 Feb 2025  | Asymmetric (Public) Key [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit04_public_key)]                       | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit04_public_key/lab)]                     |
-| 6  | 24 Feb 2025  | Key Exchange   [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit05_key_exchange)]                                | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit05_key_exchange/lab) Whitfield Diffie]                |
+| 6  | 24 Feb 2025  | Key Exchange   [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit05_key_exchange)]                                | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit05_key_exchange/lab) [Whitfield Diffie](https://www.youtube.com/watch?v=KgkdwtYW-tE) ]                |
 | 7 | 3 Mar 2025  | Reading Week (Revision lecture)   | Mini-project  [[Here](https://github.com/billbuchanan/appliedcrypto/tree/main/unit06a_mini_project)] /Coursework |
-| 8  | 10 Mar 2025   | Digital Signatures and Certificates   [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit06_trust_dig_cert)]              | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit06_trust_dig_cert/lab) Vincent Rijmen]   
+| 8  | 10 Mar 2025   | Digital Signatures and Certificates   [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit06_trust_dig_cert)]              | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit06_trust_dig_cert/lab) ]   
 | 9  | 17 Mar 2025  | Test (Units 1-5) 40% of overall mark [[Here](https://github.com/billbuchanan/appliedcrypto/tree/main/z_assessments/test01)] |                                |
 | 10 | 24 Mar 2025  | Tunnelling     [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit07_tunnelling)]                                | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit07_tunnelling/lab) Marty Hellman                      |
 | 11 | 31 Mar 2025   | Blockchain   [[Unit](https://github.com/billbuchanan/appliedcrypto/tree/main/unit08_blockchain)]                                             | [[Lab](https://github.com/billbuchanan/appliedcrypto/tree/main/unit08_blockchain/lab)] [Troy Hunt](https://us02web.zoom.us/j/87987679833?pwd=SVhMUHRVbXRRQjc0anFTS1UyaGVhQT09)     |