<prompt> Hlalosa hore na ke hobaneng ha tsamaiso ea blockchain e sireletsehile.nan  <response>: Instruction in English: Explain why a blockchain system is secure. . Response in English: A blockchain system is secure because of its decentralized nature and the use of cryptographic techniques. Unlike traditional systems where there is a central authority controlling the network, a blockchain network is maintained by a distributed network of computers that all work together to validate transactions and add them to the blockchain. This makes it much harder for an attacker to compromise the network, as they would need to gain control of the majority of the computers in the network known as a 51 attack in order to compromise the integrity of the blockchain.In addition, each block in the blockchain contains a cryptographic hash that links it to the previous block. This hash is generated using the data from the previous block and is unique to that block. If any data in a block is changed, even by a single character, the hash will be different, and the entire chain of blocks after it will be invalidated. This means that any attempt to tamper with the blockchain will be quickly detected and rejected by the other participants in the network.Furthermore, the use of public-key cryptography in blockchain systems also helps to ensure security. Each user in the blockchain network has a pair of cryptographic keys a public key and a private key. The public key is used to verify the users identity, while the private key is used to sign transactions. Only the user has access to their private key, and any transactions signed with it are considered valid. This means that it is very difficult for an attacker to impersonate another user and carry out fraudulent transactions.In conclusion, the decentralized nature of a blockchain system, the use of cryptographic techniques, and the use of public-key cryptography all work together to make it a highly secure system. . Response in Sesotho: Sistimi ea blockchain e bolokehile ka lebaka la tlhaho ea eona e arohaneng le tsebeliso ea mahlale a cryptographic. Ho fapana le mekhoa ea setso moo ho nang le bolaoli bo bohareng bo laolang marang-rang, marang-rang a blockchain a hlokomeloa ke marang-rang a ajoang a likhomphieutha tseo kaofela li sebetsang hammoho ho netefatsa litšebelisano le ho li kenya ho thibela. Sena se etsa hore ho be thata haholo hore mohlaseli a sekisetse marang-rang, kaha ba ne ba tla hloka ho laola boholo ba likhomphieutha tsa marang-rang tse tsejoang e le tlhaselo ea 51 e le hore ba sekisetse botšepehi ba blockchain. Ntle le moo, blockchain e ngoe le e ngoe ea blockchain e na le cryptographic hash e e hokahanyang le block e fetileng. Hashe ena e hlahisoa ho sebelisoa data ho tloha thibela e fetileng mme e ikhetha ho thibela eo. Haeba data leha e le efe e ka hara block e fetoloa, esita le ka sebopeho se le seng, hash e tla fapana, me ketane eohle ea li-blocks ka mora eona e tla be e sa sebetse. Sena se bolela hore boiteko leha e le bofe ba ho senya blockchain bo tla fumanoa ka potlako me bo haneloe ke barupeluoa ba bang ba marang-rang. Ho feta moo, tsebeliso ea li-crypto-key cryptography litsebetsong tsa blockchain e boetse e thusa ho netefatsa tsireletso. Mosebelisi e mong le e mong oa marang-rang oa blockchain o na le linotlolo tsa cryptographic - senotlolo sa sechaba le senotlolo sa lekunutu. Senotlolo sa sechaba se sebelisetsoa ho netefatsa boitsebiso ba mosebedisi, ha senotlolo sa lekunutu se sebelisetsoa ho saena litšebelisano. Ke mosebelisi feela ea nang le monyetla oa ho fumana senotlolo sa hae sa lekunutu, me litšebelisano life kapa life tse saenneng le eona li nkuoa li nepahetse. Sena se bolela hore ho thata haholo ho mohlaseli ho iketsa mosebelisi e mong le ho etsa litšebelisano tsa bolotsana. Qetellong, mokhoa oa ho aroloa ha tsamaiso ea blockchain, tšebeliso ea mekhoa ea li-cryptographic, le tšebeliso ea li-cryptography tsa sechaba kaofela li sebetsa moho ho etsa hore e be mokhoa o sireletsehileng haholo. 