International Journal of Computer Network and Information Security (IJCNIS)
IJCNIS Vol. 17, No. 6, 8 Dec. 2025
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Scalable-pos: Towards Decentralized and Efficient Energy Saving Consensus in Blockchain
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Author(s)
Anupama B. S.
1,*
Sunitha N. R.
1
G. S. Thejas
2
Index Terms
Blockchain, Consensus Protocol, Decentralization, Proof of Stake, Scalability
Abstract
Blockchain has become peer-to-peer immutable distributed ledger technology network, and its consensus protocol is essential to the management of decentralized data. The consensus algorithm, at core of blockchain technology (BCT), has direct impact on blockchain's security, stability, decentralization, and many other crucial features. A key problem in development of blockchain applications is selecting the right consensus algorithm for various scenarios. Ensuring scalability is the most significant drawback of BCT. The industry has been rejuvenated and new architectures have been sparked by the usage of consensus protocols for blockchains(BC). Researchers analyzed shortcomings of proof of work (PoW) consensus process and subsequently, alternative protocols like proof of stake (PoS) arose. PoS, together with other improvements, lowers the unimaginably high energy usage of PoW, making it protocol of time. In PoS, only the user with highest stake becomes the validator. To overcome this, we propose Scalable Proof of Stake (SPoS), a novel consensus protocol, which is an enhancement of PoS protocol. In the proposed algorithm, each stakeholder based on the stake gets a chance to become the validator and can mine blocks in the blockchain. Clustering of the stakeholders is done using mean shift algorithm. Each cluster gets a different number of blocks to mine in BC. Cluster with highest stake will get a greater number of blocks to mine when compared to other groups and the cluster with the least stake gets least number of blocks to mine when compared to other groups. To mine the blocks, validator is chosen based on the cluster in which he is present. Fair mining is ensured for all stakeholders based on number of stakes. Mining is distributed among all the stakeholders. Since the validators are chosen fast, the transaction rate is high in the network. Validators in PoS are selected according to the quantity of cryptocurrency they stake. More stakeholders will get chance of validating blocks and receiving rewards. Over time, this reduces fairness and decentralization by concentrating on wealth and power. This is addressed in SPoS using clustering-based validator assignment.
Cite This Paper
Anupama B. S., Sunitha N. R., G. S. Thejas, "Scalable-pos: Towards Decentralized and Efficient Energy Saving Consensus in Blockchain", International Journal of Computer Network and Information Security(IJCNIS), Vol.17, No.6, pp.84-97, 2025. DOI:10.5815/ijcnis.2025.06.06
Reference
[1]S. Zhang and J. H. Lee, “Analysis of the main consensus protocols of blockchain,” ICT Express, vol. 6, no. 2, pp. 93–97, 2020, doi: 10.1016/j.icte.2019.08.001.
[2]B. S. Anupama and N. R. Sunitha, “Analysis of the Consensus Protocols used in Blockchain Networks - An overview,” IEEE Int. Conf. Data Sci. Inf. Syst. ICDSIS 2022, pp. 1–6, 2022, doi: 10.1109/ICDSIS55133.2022.9915929.
[3]L. Qi, J. Tian, M. Chai, and H. Cai, “LightPoW: A trust based time-constrained PoW for blockchain in internet of things,” Comput. Networks, vol. 220, no. April 2022, p. 109480, 2023, doi: 10.1016/j.comnet.2022.109480.
[4]B. Cao et al., “Performance analysis and comparison of PoW, PoS and DAG based blockchains,” Digit. Commun. Networks, vol. 6, no. 4, pp. 480–485, 2020, doi: 10.1016/j.dcan.2019.12.001.
[5]Y. Wang et al., “Study of Blockchains’s Consensus Mechanism Based on Credit,” IEEE Access, vol. 7, pp. 10224–10231, 2019, doi: 10.1109/ACCESS.2019.2891065.
[6]A. K. Yadav, K. Singh, A. H. Amin, L. Almutairi, T. R. Alsenani, and A. Ahmadian, “A comparative study on consensus mechanism with security threats and future scopes: Blockchain,” Comput. Commun., vol. 201, no. October 2022, pp. 102–115, 2023, doi: 10.1016/j.comcom.2023.01.018.
[7]H. Xiong, M. Chen, C. Wu, Y. Zhao, and W. Yi, “Research on Progress of Blockchain Consensus Algorithm: A Review on Recent Progress of Blockchain Consensus Algorithms,” Futur. Internet, vol. 14, no. 2, 2022, doi: 10.3390/fi14020047.
[8]V. Bachani and A. Bhattacharjya, “Preferential Delegated Proof of Stake (PDPoS)—Modified DPoS with Two Layers towards Scalability and Higher TPS,” Symmetry (Basel)., vol. 15, no. 1, 2023, doi: 10.3390/sym15010004.
[9]R. Chen, L. Wang, and R. Zhu, “Improvement of Delegated Proof of Stake Consensus Mechanism Based on Vague Set and Node Impact Factor,” Entropy, vol. 24, no. 8, 2022, doi: 10.3390/e24081013.
[10]“DOGECOIN web page,” Available online : https://dogecoin.com/.
[11]“Litecoin Web Page,” Available online : https://litecoin.org/.
[12]L. Bahri and S. Girdzijauskas, “When Trust Saves Energy: A Reference Framework for Proof of Trust (PoT) Blockchains,” Web Conf. 2018 - Companion World Wide Web Conf. WWW 2018, pp. 1165–1169, 2018, doi: 10.1145/3184558.3191553.
[13]K. J. O’Dwyert and D. Malone, “Bitcoin mining and its energy footprint,” IET Conf. Publ., vol. 2014, no. CP639, pp. 280–285, 2014, doi: 10.1049/cp.2014.0699.
[14]P. Giungato, R. Rana, A. Tarabella, and C. Tricase, “Current trends in sustainability of bitcoins and related blockchain technology,” Sustain., vol. 9, no. 12, 2017, doi: 10.3390/su9122214.
[15]E. Symitsi and K. J. Chalvatzis, “Return, volatility and shock spillovers of Bitcoin with energy and technology companies,” Econ. Lett., vol. 170, pp. 127–130, 2018, doi: 10.1016/j.econlet.2018.06.012.
[16]H. Vranken, “Sustainability of bitcoin and blockchains,” Curr. Opin. Environ. Sustain., vol. 28, pp. 1–9, 2017, doi: 10.1016/j.cosust.2017.04.011.
[17]J. Spasovski and P. Eklund, “Proof of stake blockchain: Performance and scalability for groupware communications,” 9th Int. Conf. Manag. Digit. Ecosyst. MEDES 2017, vol. 2017-Janua, pp. 251–258, 2017, doi: 10.1145/3167020.3167058.
[18]M. Bartoletti, S. Lande, and A. S. Podda, “A proof-of-stake protocol for consensus on bitcoin subchains,” Lect. Notes Comput. Sci. (including Subser. Lect. Notes Artif. Intell. Lect. Notes Bioinformatics), vol. 10323 LNCS, pp. 568–584, 2017, doi: 10.1007/978-3-319-70278-0_36.
[19]L. Fan and H.-S. Zhou, “A Scalable Proof-of-Stake Blockchain in the Open Setting ∗ (or, How to Mimic Nakamoto’s Design via Proof-of-Stake),” Cryptol. ePrint Arch., 2018, [Online]. Available: https://eprint.iacr.org/2017/656.pdf
[20]A. M. Bentov Iddo, Ariel Gabizon, “Cryptocurrencies Without Proof of Work,” Lect. Notes Comput. Sci. (including Subser. Lect. Notes Artif. Intell. Lect. Notes Bioinformatics), vol. 8438, pp. 142–157, 2016, doi: 10.1007/978-3-662-44774-1.
[21]Z. Zheng, S. Xie, H. Dai, X. Chen, and H. Wang, “An Overview of Blockchain Technology: Architecture, Consensus, and Future Trends,” Proc. - 2017 IEEE 6th Int. Congr. Big Data, BigData Congr. 2017, pp. 557–564, 2017, doi: 10.1109/BigDataCongress.2017.85.
[22]D. B. and O. R. Kiayias, Aggelos, Russell Alexander, Ouroboros: A Provably Secure Proof-of-Stake Blockchain Protocol, vol. 10403, no. 639554. 2017. doi: 10.1007/978-3-319-63688-7.
[23]J. Garay, A. Kiayias, and Nikos Leonardos, “The Bitcoin Backbone Protocol: Analysis and Applications,” vol. 9057, pp. 817–836, 2015, doi: 10.1007/978-3-662-46803-6.
[24]R. P. and E. S. Phil Daian, “Snow white: Robustly reconfigurable consensus and applications to provably secure proof of stake,” in International Conference on Financial Cryptography and Data Security, 2019, pp. 23–41. doi: https://doi.org/10.1007/978-3-030-32101-7_2.
[25]R. Pass and E. Shi, “FruitChains: A fair blockchain,” Proc. Annu. ACM Symp. Princ. Distrib. Comput., vol. Part F1293, pp. 315–324, 2017, doi: 10.1145/3087801.3087809.
[26]J. Chen and S. Micali, “Algorand: A secure and efficient distributed ledger,” Theor. Comput. Sci., vol. 777, pp. 155–183, 2019, doi: 10.1016/j.tcs.2019.02.001.
[27]B. Wang, Z. Li, and H. Li, “Hybrid consensus algorithm based on modified proof-of-probability and DPoS,” Futur. Internet, vol. 12, no. 8, pp. 1–16, 2020, doi: 10.3390/FI12080122.
[28]MoonKing, “Supernode Proof of Stake Consensus Complete Guide by MoonKing9998,” 2019. https://medium.com/@moonking9998/supernode-proof-of-stake-complete-guide-by-moonking9998-41a8f7675a28
[29]C. Badertscher, P. Gaži, A. Kiayias, A. Russell, and V. Zikas, “Ouroboros genesis: Composable proof-of-stake blockchains with dynamic availability,” Proc. ACM Conf. Comput. Commun. Secur., no. 780477, pp. 913–930, 2018, doi: 10.1145/3243734.3243848.
[30]S. King and S. Nadal, “PPCoin: Peer-to-Peer Crypto-Currency with Proof-of-Stake,” Proc. 2016 ACM SIGSAC Conf. Comput. Commun. Secur. - CCS’16, vol. 1919, no. January, pp. 1–27, 2017, [Online]. Available: http://peerco.in/assets/paper/peercoin-paper.pdf%0Ahttp://fc17.ifca.ai/preproceedings/paper_73.pdf%0Ahttp://arxiv.org/abs/1606.06530%0Ahttps://papers.ssrn.com/sol3/papers.cfm?abstract_id=2977811%0Ahttp://dl.acm.org/citation.cfm?doid=2976749.2978389%0Ahttp
[31]G. Fanti, L. Kogan, S. Oh, K. Ruan, P. Viswanath, and G. Wang, “Compounding of Wealth in Proof-of-Stake Cryptocurrencies,” Lect. Notes Comput. Sci. (including Subser. Lect. Notes Artif. Intell. Lect. Notes Bioinformatics), vol. 11598 LNCS, pp. 42–61, 2019, doi: 10.1007/978-3-030-32101-7_3.
[32]M. Li et al., “CrowdBC: A blockchain-based decentralized framework for crowdsourcing,” IEEE Trans. Parallel Distrib. Syst., vol. 30, no. 6, pp. 1251–1266, 2019, doi: 10.1109/TPDS.2018.2881735.
[33]V. Buterin, “Proof of Work is the Rich Get Richer Squared" Says Vitalik Buterin,” 2018. https://www.trustnodes.com/2018/07/10/proof-work-rich-get-richer-squared-says-vitalik-buterin
[34]M. Saad, V. Cook, L. Nguyen, M. T. Thai, and A. Mohaisen, “Partitioning attacks on bitcoin: Colliding space, time, and logic,” Proc. - Int. Conf. Distrib. Comput. Syst., vol. 2019-July, pp. 1175–1187, 2019, doi: 10.1109/ICDCS.2019.00119.
[35]M. Saad et al., “Exploring the Attack Surface of Blockchain: A Comprehensive Survey,” IEEE Commun. Surv. Tutorials, vol. 22, no. 3, pp. 1977–2008, 2020, doi: 10.1109/COMST.2020.2975999.
[36]T. Duong, A. Chepurnoy, L. Fan, and H.-S. Zhou, “TwinsCoin: A Cryptocurrency via Proof-of-Work and Proof-of-Stake,” pp. 1–13, 2018, doi: 10.1145/3205230.3205233.
[37]I. Bentov, C. Lee, A. Mizrahi, and M. Rosenfeld, “Proof of Activity: Extending Bitcoin’s Proof of Work via Proof of Stake,” Cryptol. ePrint Arch., vol. 452, no. 3, pp. 1–19, 2014.
[38]W. Li, S. Andreina, J. M. Bohli, and G. Karame, “Securing Proof-of-Stake Blockchain Protocols Wenting,” Proceedings, pp. 297–315, 2017, doi: 10.1007/978-3-319-67816-0.
[39]F. Saleh, “Blockchain Without Waste: Proof-of-Stake,” SSRN Electron. J., no. May, 2018, doi: 10.2139/ssrn.3183935.
[40]L. M. Bach, B. Mihaljevic, and M. Zagar, “Comparative analysis of blockchain consensus algorithms,” 2018 41st Int. Conv. Inf. Commun. Technol. Electron. Microelectron. MIPRO 2018 - Proc., pp. 1545–1550, 2018, doi: 10.23919/MIPRO.2018.8400278.
[41]X. Wei, A. Li, and Z. He, “Impacts of consensus protocols and trade network topologies on blockchain system performance,” Jasss, vol. 23, no. 3, pp. 1–20, 2020, doi: 10.18564/jasss.4289.
[42]Z. Hussein, M. A. Salama, and S. A. El-Rahman, “Evolution of blockchain consensus algorithms: a review on the latest milestones of blockchain consensus algorithms,” Cybersecurity, vol. 6, no. 1, 2023, doi: 10.1186/s42400-023-00163-y.
[43]M. I. Mehar et al., “Understanding a revolutionary and flawed grand experiment in blockchain: The DAO attack,” J. Cases Inf. Technol., vol. 21, no. 1, pp. 19–32, 2019, doi: 10.4018/JCIT.2019010102.
[44]L. Mearian, “MIT’s blockchain-based ‘Spider’ offers 4X faster cryptocurrency processing,” 2020. https://www.computerworld.com/article/3518893/mits-blockchain-based-spider-offers-4x-faster-cryptocurrency-processing.html