• chosen cyphertext: the attacker can choose arbitrary cyphertext and find the corresponding decrypted plaintext (this can show in public key systems, where it may reveal the private key)
â € ¢ waliochaguliwa cyphertext: mshambulizi anaweza kuchagua cyphertext holela na kupata sambamba decrypted maandishi wazi (hii inaweza kuonyesha katika mifumo umma muhimu, ambapo inaweza yatangaza ufunguo binafsi)