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Regarded as more efficient than ECDSA and presented as a means to enhance scalability and transaction confidentiality on the Bitcoin network, the Schnorr authentication protocol is a signature algorithm invented by Claus P. Schnorr, a German mathematician and cryptographer.

This certified opsec sweatshirt is designed for an informed Bitcoiner.

Learn more: 

Schnorr Signatures - Yannick Seurin (ANSSI)

One-of-a-kind piece crafted.


  • Black fabric
  • Optical white transfer 
  • White unicorn embroidery


  • Fleece 80% organic cotton - 20% recycled polyester 280 g/m², GOTS and GRS certified
  • Lined hood
  • Kangaroo pocket
  • Tone-on-tone drawstring
  • Ribbed cuffs and waistband
  • Unicorn embroidered in Paris
  • Transfer done in Paris
  • Sweatshirt made in Italy
  • Registered design

Care Instructions:

  • Wash at 30°C
  • Iron gently at low temperature inside out
  • Do not use bleach
  • Do not tumble dry

This hoodie is slightly fitted. For an oversized effect, we recommend taking a size up.

This model is made to order. The time required for the making of this item is estimated between 3 and 6 weeks.

Don't forget to specify your size in the note section when validating your cart.