---
# System prepended metadata

title: Treasure hunt

---

# Treasure hunt

Welcome to your first tresure hunt based on cryptography! :moneybag: Have you ever heard about [Vigenère cipher](https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher)?
Let's warm up!

Here is an example:
```
arya + abcd = asad
asad - abcd = arya
```

Can you compute these? :+1: 
```
arya + crco = ?
ciao - crco = ?
```

This table or [script](https://tio.run/##jVbbjuI4EH3nK2ppjbBFQNO0dkeDhgcYza76bdTZh5WiCJlgiEeJE8VOX1b7771VdgIxzVzggaTiOnXq1CXULzav9N3rqyrrqrHQyFF/JfS@KkejG4jb2lkOrc6sqvRoLw9QN0rbbSNt22j2zJcjwI8z4p278c/gGSFubuBeW3mUDRjpMRxuCcqbDRTKWOOQTVtuCWYdwSYCZbabrZZHYdWjhBX8KQoju3DCGNlYVkjN1hxWK6CrDQ/CJ0zAFHYc3sHiD1AH0JW9AJWICHhsdjp2qBoQ0Q7Zwb@qRiYbnhLjz1VZt1aCyUUjDVQHELpPwXOnB1uj9LGQLgkRge7Yxsg@8arO6Ycev48Wv3MXTlEwNB8lGvXsFgMOsogxh8RRRHVYzD1PPPITUl5XxBmw67TtafU6XafupSBu69QXMrZY5GNQR9vILAfjHvhAaLFZzkwExdtaGQ6f0O7MxvnK/daQOj7nN3L0GKHDXNS11HtmEoVqeOA0qP14PP9WKbSffPjI8csw162tXJpZqEPV7Fk2L6on2TCUeQYfP3gfand0IVemQp8sRxNW6OMH7rtEP2KunSBgq7AavUL4rOcQX9RiyM/4GhgSJE6H@GGNMcygAh1bb2H3F/hhLmfB79N@Lr3jeSA7oJ/P5IX0IY9@tMPs1zwKDRt@EYNz/p3xC7rOd/CJad/htWisEsUtdViQeiitu47p@jwnb4giaDoEXTjQOFED9z5eemWwQ@878u6livkbiEVKhwNdsc268z2Gb/nhJkjWKe2LTYrtm3ym6/l8Djth5B4qDTaXFIDuHkXRopJ@KNB7K59r9uWfr8E@7wkmqAaTnJaohN9WMJlOcNXsu5vZxC/SCX6naJu6K8pIUkYImnabGf1pWikMLe3b83B3SeKT5L0XiiDPz9cPf1EVB88766KzLs5WjEIWrMLKUT2j0OfhC63jYWcjdOSg@OmgLEKQ2a@DRPB300p@mdlJ4wR9qTCEfrfEtTV6ylUhnZcPgqcQXGmsKBvfa9qeZMPGN7h3lzD24DiuL9qKZ9/J2Li0cgStZwy57I64hnZtkei0rwGCzY3FJjJPyuZs7A6NB6vWV38Su2lburJSBwRj5kDqQlnGUaWIHIamBdacXyPalqUjiu1j2p1tBL5N6K3i1w4w@Si1bUVRvHTTzkFkGS7nbqNSDxvc6aXsc7ze9Fea6Aa@UvNT/icblgHFbmRHfMKS6X@zlE8iSqaRdSEyybCfo8mE8wFSP3El5oU9fbQ5iLIiisSv26H9cTy0LTAM/rKEJkDyYD6@P1iQDoPG/u16Esvk@O8M/1rZHF/8ZyYXySX9S1lGnskPBpluOoKfOtputmU4z1eEQPMoHI9grVz21oM0bWHPvYUuqO/rq2he6G@b2GX7/wE) is your friend! :female_elf: 

![alt text](https://raw.githubusercontent.com/lorenzogentile404/vigenere-additive-secret-sharing/main/Vigen%C3%A8re_square_shading.svg.png)

## Let's start now!

0. Ask to Lorenzo your secret key and go to step 1. You will discover later how to use it. :key: :key: :key: :key:
1. A cat heard what you are looking for and it is still in her ears :cat: 
2. teqtfpdhdvkfbqmtvxhpjmkngjyhwjeodhx
3. dqwdmyfdxcqnalsrnlkdkbmkd

