Ciphergraphy is Purley an algorithmic technique in which we send massages in coding form under encrypted rules. Ciphers has rich history with human where high level massages sent between the top officials in secret coding language.
Ciphers still used by top diplomats to deliver the massage from country to country especially ambassadors send daily official posts back to their concern ministry. It is never easy to any one (almost impossible) to decode it. Here is an example of it ,

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This cipher sent by an ambassador to US foreign affairs ministry from somewhere during the World war 2.
Role of ciphergraphy in Crypto.
Cipher technique used by programmers , developers and designers to make encryption and decryption the key words into coding to make blockchain technology unaccessible to common people.

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These encryption and decryption technique which work massage encoding under a algorithm to make sure the massage deliver ,like a transaction on blockchain, at destination in authentic , confidential and untouched way.
Ciphergraphy makes sure the transparency , accuracy and integrity of any transaction which flows on any blockchain technology. Different chains used different techniques like Bitcoin using Ettiptic Curve with SHA-256 algorithm and ethereum working with EVM technique. But both has same aim to provide secured environment for Transactions to their users.
The trust and confidence over unaltered, untouched and unmodified Crypto transaction is only possible due to its ciphergraphy which enables it to secure and reliable.
Cheers,
Amjad