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ArticlesTelecom & Blockchain: Why Telefonica launched DLT-based services
Leading communication service providers are changing their standards and striving for more security and transparency. Recently, Telefonica introduced a blockchain-based workflow. But other gaps remain in the telecom industry – and blockchain can bridge them.
Seven leading communication service providers – AT&T, Colt, Deutsche Telekom, Globe Telecom, Softbank, Vodafone, and Telefónica – are experimenting with blockchain and distributed ledgers. Successful experiments are becoming a part of the market, and blockchain is changing the game.

Spanish company Telefónica recently announced the implementation of TrustOS, its blockchain-based software for document flow. It combines a user's digital signature with cryptographic hashing of verifiable documents. Both elements are recorded on the blockchain to protect their origin and data integrity. Before this, Telefonica had used IBM's blockchain platform to log information f
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