diff --git a/batch/2019-21.md b/batch/2019-21.md
index 95d3427..9ad8dc9 100644
--- a/batch/2019-21.md
+++ b/batch/2019-21.md
@@ -10,16 +10,16 @@
 | S.No | Roll No. | Name | Project Title | 
 |:----:|:-----------:|:----|:----|
 | 1 | CB.EN.P2CYS19001 | Aju Mathew Thomas | Decentralized-Identifier and Verifiable Claims: A Novel Approach to Build Trust and Privacy in Vehicle Deals | 
-| 2 | CB.EN.P2CYS19002 | Aswathi Balachandran | Steganalysis to Detect QIM Steganography for Voip Streams | 
-| 3 | CB.EN.P2CYS19003 | Naga Sai Abhishek | A Secure Lightweight Authentication Protocol for IoT Device  | 
+| 2 | CB.EN.P2CYS19002 | Aswathi Balachandran | [VPN Network Traffic Classification Using Entropy Estimation and Time-Related Features](https://link.springer.com/chapter/10.1007/978-981-16-3945-6_50) | 
+| 3 | CB.EN.P2CYS19003 | Naga Sai Abhishek | [SLAP-IoT: A Secure Lightweight Authentication Protocol for IoT Device](https://link.springer.com/chapter/10.1007/978-981-16-5529-6_61)  | 
 | 4 | CB.EN.P2CYS19004 | C.N.V Hrushikesh | A Multi Class Classification for Detection of IoT Botnet Malware  | 
-| 5 | CB.EN.P2CYS19005 | Abhiram D | Zero Trust Security Implementation Using SDP over VPN | 
-| 6 | CB.EN.P2CYS19006 | Gowtham Akshaya Kumaran | Real Time Segregation of Encrypted Data using Entropy | 
-| 7 | CB.EN.P2CYS19007 | K.V.L.Bhargavi | Panther:- A Sponge Based Lightweight Authenticated Encryption Scheme | 
+| 5 | CB.EN.P2CYS19005 | Abhiram D | [Zero-Trust Security Implementation Using SDP over VPN](https://link.springer.com/chapter/10.1007/978-981-16-5529-6_22) | 
+| 6 | CB.EN.P2CYS19006 | Gowtham Akshaya Kumaran | [Real-Time Segregation of Encrypted Data Using Entropy](https://link.springer.com/chapter/10.1007/978-981-16-9113-3_61) | 
+| 7 | CB.EN.P2CYS19007 | K.V.L.Bhargavi | [Panther: A Sponge Based Lightweight Authenticated Encryption Scheme](https://link.springer.com/chapter/10.1007/978-3-030-92518-5_3) | 
 | 8 | CB.EN.P2CYS19008 | Lakshmi Subhadra Khande | A Machine Learning Based Intrusion Detection and Prevention System for Internet of Things | 
-| 9 | CB.EN.P2CYS19009 | Aishvarya Nair | Dweb Application on Beaker and Brave Browser | 
+| 9 | CB.EN.P2CYS19009 | Aishvarya Nair | [Challenging the Network Privacy of Beaker Browser](https://link.springer.com/chapter/10.1007/978-981-16-5529-6_32) | 
 | 10 | CB.EN.P2CYS19010 | Panguluri Sai Deepika | Real Time Sniffing of Secret Sharing Images and Predicting the Crack Resistivity | 
-| 11 | CB.EN.P2CYS19011 | Manthan Patel | DDoS Attack Detection Model Using Machine Learning Algorithm in Next Generation Firewall | 
+| 11 | CB.EN.P2CYS19011 | Manthan Patel | [DDoS Attack Detection Model Using Machine Learning Algorithm in Next Generation Firewall]() | 
 | 13 | CB.EN.P2CYS19013 | S Ribu Hassini | Detection of Attacks in Industrial Control Systems Using Machine Learning and Deep Neural Network | 
 | 14 | CB.EN.P2CYS19014 | Samia Anjum | Identity Based Proxy Re-Encryption Using CRT (IPRC) | 
 | 15 | CB.EN.P2CYS19017 | Sivadanam Yaswanth Lingam | Blockchain Framework with Hybrid Architecture: Towards GDPR Compliance |